WO2022241698A1 - 模数转换电路、集成芯片、显示装置及模数转换方法 - Google Patents
模数转换电路、集成芯片、显示装置及模数转换方法 Download PDFInfo
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/124—Sampling or signal conditioning arrangements specially adapted for A/D converters
- H03M1/1245—Details of sampling arrangements or methods
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
Definitions
- the present disclosure relates to the field of electronic technology, and in particular, to an analog-to-digital conversion circuit, an integrated chip, a display device, and an analog-to-digital conversion method.
- ADC Analog-to-Digital Converter
- the conversion accuracy and cost of the ADC mainly depend on the ADC bit width.
- the purpose of the present disclosure is to provide an analog-to-digital conversion circuit, an integrated chip, a display device and an analog-to-digital conversion method.
- an analog-to-digital conversion circuit includes:
- the first conversion circuit is configured to convert the original analog signal to obtain a first digital signal with a first bit width
- At least one voltage dividing circuit for each voltage dividing circuit, configured to divide the first-level analog signal to obtain a second-level analog signal, wherein the first-level analog signal is the original analog signal, or The second level analog signal output by the previous voltage dividing circuit adjacent to the voltage dividing circuit;
- the second conversion circuit corresponding to the voltage divider circuit is configured to convert the received second-level analog signal according to a preset algorithm to obtain a second digital signal with a second bit width;
- a control calculation circuit configured to obtain a target digital signal with a third bit width according to the first digital signal and the second digital signal
- the third bit width is greater than the first bit width, and the third bit width is greater than the second bit width.
- the voltage dividing circuit includes a plurality of voltage dividing resistors, and a first switch tube corresponding to each voltage dividing resistor;
- the multiple voltage dividing resistors are connected in series;
- each voltage dividing resistor is connected to the first end of the corresponding first switching tube;
- each first switch tube is connected to each other, and is connected to the second conversion circuit corresponding to the voltage divider circuit, and the control end of each first switch tube is connected to the control calculation circuit;
- the first terminal of the first voltage-dividing resistor is used to input the first-stage analog signal, and the second terminal of the last voltage-dividing resistor is grounded.
- the number of voltage dividing circuits in the at least one voltage dividing circuit is one;
- the first level analog signal is the original analog signal.
- the number of voltage dividing circuits in the at least one voltage dividing circuit is multiple, and the multiple voltage dividing circuits are connected in series;
- the first-stage analog signal is a second-stage analog signal output by a previous voltage-dividing circuit connected in series with the voltage-dividing circuit.
- the number of voltage dividing circuits in the at least one voltage dividing circuit is multiple, and the multiple voltage dividing circuits are connected in parallel;
- the first level analog signal is the original analog signal.
- control computing circuit is specifically configured to control a first switch transistor of at least one of the voltage dividing circuits to turn on according to the first digital signal.
- the first conversion circuit includes a first analog-to-digital converter with the first bit width and a second switch tube;
- the first end of the second switch tube is configured to input the original analog signal
- the second end of the second switch tube is electrically connected to the input end of the first analog-to-digital converter
- the second switch The control terminal of the tube is electrically connected to the control calculation circuit, and the output terminal of the first analog-to-digital converter is electrically connected to the control calculation circuit;
- the control calculation circuit is specifically configured to control the second switching tube to turn on at the first sampling moment, and control the second switching tube to turn off at the second sampling moment, wherein the first sampling moment is earlier than The second sampling moment.
- the second conversion circuit includes a second analog-to-digital converter
- the input end of the second analog-to-digital converter is electrically connected to the second end of each first switching tube in the corresponding voltage divider circuit, and the output end of the second analog-to-digital converter is connected to the control calculation circuit electrical connection;
- the control calculation circuit is specifically configured to, if the first digital signal is within a first preset range, control the first one of the at least one voltage divider circuit in the voltage divider circuit at the second sampling moment.
- the first switch tube corresponding to the voltage dividing resistor is turned on; if the first digital signal is within a second preset range, then according to the first digital signal, control the voltage dividing circuit in the second sampling moment A first switch tube of at least one voltage dividing circuit is turned on.
- control computing circuit is specifically configured to:
- the sum of the adjusted digital signal and the second digital signal is used as the target digital signal.
- the bit width of the first analog-to-digital converter is equal to the bit width of the second analog-to-digital converter.
- the preset algorithm is an A-law 13-fold algorithm.
- an integrated chip including any one of the above-mentioned analog-to-digital conversion circuits.
- a display device including the above-mentioned integrated chip.
- an analog-to-digital conversion method applied to any one of the analog-to-digital conversion circuits described in the first aspect including:
- the first-level analog signal is divided by one of the at least one voltage-dividing circuit to obtain a second-level analog signal, wherein the first-level analog signal is the original analog signal, or is the same as the original analog signal.
- the second level analog signal obtained by the previous voltage dividing circuit adjacent to one voltage dividing circuit;
- the third bit width is greater than the first bit width, and the third bit width is greater than the second bit width.
- the number of voltage dividing circuits in the at least one voltage dividing circuit is one;
- the step of dividing the first-level analog signal by one of the at least one voltage-dividing circuit to obtain the second-level analog signal includes:
- the first-level analog signal is divided by controlling the conduction of a switch in the voltage dividing circuit to obtain the second-level analog signal, wherein the first-level analog
- the signal is the original analog signal.
- the number of voltage dividing circuits in the at least one voltage dividing circuit is multiple, and the multiple voltage dividing circuits are connected in series;
- the step of dividing the first-level analog signal by one of the at least one voltage-dividing circuit to obtain the second-level analog signal includes:
- the first digital signal by controlling the conduction of a switch in one of the at least one voltage dividing circuit to divide the first level of analog signal, the second level of analog signal, wherein the first-level analog signal is a second-level analog signal output by a previous voltage dividing circuit adjacent to the one voltage dividing circuit.
- the number of voltage dividing circuits in the at least one voltage dividing circuit is multiple, and the multiple voltage dividing circuits are connected in parallel;
- the step of dividing the first-level analog signal by one of the at least one voltage-dividing circuit to obtain the second-level analog signal includes:
- the first digital signal by controlling the conduction of a switch in one of the at least one voltage dividing circuit to divide the first level of analog signal, the second level of analog signal, wherein the first level analog signal is the original analog signal.
- the second stage if the first digital signal is within the first preset range, by controlling the conduction of a switch in one of the at least one voltage divider circuits, the second stage an analog signal equal to said original analog signal;
- the first digital signal is within the second preset range, according to the first digital signal, by controlling the conduction of a switch tube in one of the at least one voltage dividing circuit to control the conduction of the The original analog signal is divided to obtain the second-level analog signal.
- the obtaining the target digital signal of the third bit width according to the first digital signal and the second digital signal includes:
- the sum of the adjusted digital signal and the second digital signal is used as the target digital signal.
- FIG. 1 is a schematic structural diagram of an analog-to-digital conversion circuit provided by an embodiment of the present disclosure
- FIG. 2 is a schematic structural diagram of another analog-to-digital conversion circuit provided by an embodiment of the present disclosure
- Fig. 3 is the curve schematic diagram of A rate 13 fold line algorithm
- FIG. 4 is a schematic structural diagram of another analog-to-digital conversion circuit provided by an embodiment of the present disclosure.
- FIG. 5 is a schematic structural diagram of another analog-to-digital conversion circuit provided by an embodiment of the present disclosure.
- FIG. 6 is a schematic structural diagram of an analog-to-digital conversion method provided by an embodiment of the present disclosure.
- an analog-to-digital conversion circuit may include: a control calculation circuit 10, a first conversion circuit 20, at least one voltage divider circuit 30, and a second conversion circuit corresponding to the voltage divider circuit 40.
- the first conversion circuit 20 is configured to convert the original analog signal to obtain a first digital signal with a first bit width
- each voltage divider circuit 30 is configured to divide the first-level analog signal to obtain a second-level analog signal, wherein the first-level analog signal is the original analog signal, or combined with the divided The second level analog signal output by the previous voltage divider circuit adjacent to the voltage circuit;
- the second conversion circuit 40 corresponding to the voltage divider circuit 30 is configured to convert the received second-level analog signal according to a preset algorithm to obtain a second digital signal with a second bit width;
- the control calculation circuit 10 is configured to obtain a target digital signal with a third bit width according to the first digital signal and the second digital signal;
- the third bit width is greater than the first bit width, and the third bit width is greater than the second bit width.
- the first conversion circuit converts the original analog signal to obtain a digital signal with a first bit width
- the voltage divider circuit divides the voltage of the first-level analog signal to obtain a second-level analog signal
- the first-level analog signal is the original analog signal or the second-level analog signal output by the previous voltage-dividing circuit adjacent to the voltage-dividing circuit
- the second conversion circuit performs the received second-level analog signal according to a preset algorithm Convert to obtain the second digital signal with the second bit width
- control the calculation circuit to obtain the target digital signal with the third bit width according to the first digital signal and the second digital signal
- the third bit width is greater than the first bit width
- the third bit width is greater than the first bit width
- the third bit width is greater than the second bit width
- the bit width of the obtained target digital signal is greater than the bit width of the first digital signal obtained by the first conversion circuit, and also greater than the bit width of the second digital signal obtained by the second conversion circuit, so it is larger than the current In the prior art, the bit
- the analog-to-digital conversion circuit provided by the embodiments of the present disclosure may include a voltage divider circuit and a second conversion circuit, or may include multiple voltage divider circuits and multiple second conversion circuits, which will be described respectively below.
- the number of voltage divider circuits in at least one voltage divider circuit in the analog-to-digital conversion circuit is one, that is, the analog-to-digital conversion circuit includes a voltage divider circuit and a second conversion circuit:
- FIG. 2 it is a schematic structural diagram of an analog-to-digital conversion circuit provided by an embodiment of the present disclosure. It can be seen from FIG. 2 that the voltage divider circuit 20 includes 2n voltage divider resistors and 2n first switch tubes, and the voltage divider resistors correspond to the first switch tubes one by one;
- each first switching tube is connected to each other and is connected to the input end of the second conversion circuit, and the control end of each first switching tube is connected to the control calculation circuit 10 for receiving the control sent by the control calculation circuit 10 signal to control the conduction and disconnection of the first switch tube;
- n is a positive integer.
- the voltage dividing resistor has a first terminal and a second terminal
- the first switch tube has a control terminal, a first terminal and a second terminal
- the second switch tube has a control terminal, first end and second end.
- the first-stage analog signal input to the voltage divider circuit 30 is the original analog signal, and the original analog signal is divided by 2 n voltage divider resistors, and the divided analog signal is input to the second conversion circuit 40 .
- the first conversion circuit may include a second switch tube G0 and a first analog-to-digital converter ADC1 with a first bit width
- the second conversion circuit may include a second analog-to-digital converter ADC2
- the control calculation circuit 10 may It is MCU (Microcontroller Unit, micro control unit).
- the specific connection between the circuits can be as follows: the first end of the second switch tube G0 is used to input the original analog signal, the second end of the second switch tube G0 is connected to the input end of ADC1, and the second switch tube G0
- the control terminal of G0 is connected with the MCU, and is used to receive the control signal that controls the second switching tube G to be turned on and off;
- the output terminal of ADC1 is connected to the MCU, and is used to input the first digital signal to the MCU;
- the second end of (G1, G2, G3...G2 n ) is connected to the input end of ADC2;
- the output end of ADC2 is connected to the MCU for inputting the second digital signal to the MCU.
- the MCU controls the gate voltage of the switch tube G0 to turn on the switch tube G0, the original analog signal is input to ADC1, and the original analog signal is converted by ADC1 to obtain the first bit width
- the first digital signal at the second sampling moment, the MCU controls the second switching tube G0 to turn off by controlling the gate voltage of the second switching tube G0, and determines to control one of the first digital signals in the voltage divider circuit 30 according to the first digital signal.
- the switching tube is turned on, so that the original analog signal is divided by 2 n voltage dividing resistors, and the second-stage analog signal obtained by voltage division is input to the second conversion circuit 40 by controlling the determined conduction of the first switching tube.
- the second conversion circuit 40 converts the received second-level analog signal according to a preset algorithm to obtain a second digital signal with a second bit width, and the MCU obtains a third bit width according to the first digital signal and the second digital signal target digital signal.
- the first sampling moment is earlier than the second sampling moment, that is, the collected original analog signal is converted first, and then the collected original analog signal is divided into voltages.
- the MCU determines to control a switch in the voltage divider circuit 20 to turn on according to the first digital signal, it can first judge the range where the original analog signal is located, and then determine whether to divide the voltage according to the range.
- the specific method can be as follows: When the digital signal is within the first preset range, the original analog signal is directly input to ADC2; when the first digital signal is within the second preset range, the original analog signal is input to ADC2 after voltage division.
- both end values of the second preset range are smaller than any value in the first preset range, for example, the first preset range is 0 and 1, and the second preset range is greater than 1.
- the MCU controls the first switch tube G1 to be turned on; if it is determined that the original analog signal is input to ADC2 after voltage division, the MCU determines the first switch tube that needs to be turned on according to the first digital signal , specifically, the first switch tube that needs to be turned on can be determined by the following formula:
- X is the bit number corresponding to the first switch to be turned on
- n is the bit width of ADC2
- adc1 is the first digital signal.
- n 8
- the first digital signal is 5.
- X 255
- the first switch tube G255 is turned on.
- the original analog signal will be divided by 256 voltage dividing resistors. Since the 255th switching tube is turned on, the analog signal input to ADC2 is a signal obtained by dividing the voltage of the ground through two resistors (R255 and R256).
- the MCU determines whether to perform voltage division processing on the original analog signal. If no voltage division processing is performed, the original analog signal is directly input to ADC2. If it is determined to perform voltage division, the original analog signal is divided. Voltage processing, and determine which first switching tube is turned on through calculation, so that the signal input to ADC2 is the ground voltage of the position of the first switching tube being turned on, and ADC2 performs the input analog signal according to the preset algorithm converted to obtain a second digital signal with a second bit width.
- the analog signal is converted according to the preset algorithm, that is, the analog signal is first amplified according to the preset algorithm, and then the amplified analog signal is converted from analog to digital.
- the analog signal can be converted in ADC2
- the analog signal can also be amplified in the MCU, and the analog signal can also be amplified in other modules. If the conversion is performed in the MCU or other modules, the analog signal is first sent to the MCU or other modules, through The preset algorithm amplifies the analog signal in the MCU or other modules, and then sends the amplified analog signal to ADC2, and performs analog-to-digital conversion on the amplified analog signal through ADC2.
- the preset algorithm in the embodiment of the present disclosure may be the A rate 13 broken line algorithm.
- the A rate 13 broken line algorithm uses 1/4096 as the minimum quantization unit for uniform quantization of linear coding.
- the non-uniform coding reduces the small-signal quantization step by 16 times, which is equivalent to improving the signal-to-noise ratio of the small signal by 20dB.
- the small analog signal is amplified by 16 times through the A-rate 13-fold line algorithm, and then converted by ADC2 to obtain the second digital signal value of the second bit width.
- bit width of ADC1 and the bit width of ADC2 may be the same, and both may be the first bit width, such as 8 bits.
- the MCU can adjust the first digital signal based on the preset value, and use the sum of the adjusted digital signal and the second digital signal as the target digital signal.
- the preset value may correspond to a preset algorithm, for example, if the preset algorithm is an A-law 13-fold algorithm, then the preset value is 16. If the preset algorithm is another algorithm, the preset value also needs to be changed.
- two analog-to-digital converters with the same bit width can be used, for example, two 8-bit low-bit-width analog-to-digital converters ADC 1 and ADC 2 with the same reference voltage can be used, and the A-law 13-fold line algorithm can be used to analyze the first The secondary analog signal is converted.
- the voltage dividing resistor and the same number of first switching tubes corresponding to it form a voltage dividing circuit;
- the MCU controls to turn on the gate of the second switching tube G0, the original analog signal is input to ADC1, and ADC1 converts the original analog signal to obtain the first digital signal. Since an 8-bit analog-to-digital converter is used, the first The digital signal value adc1 is an integer between 0 and 255;
- ADC 1 and ADC 2 are the same analog-to-digital conversion
- the preset algorithm is the A-law 13 broken line algorithm, if the (0-1/64) interval of the algorithm is selected to amplify the signal input to ADC2, the second-stage analog signal input to the front end of ADC2 must be ADC2 within the range of (0 to 1/64) of the range.
- each voltage dividing resistor in the embodiment of the present invention may be the same or different. If the resistance value of each voltage dividing resistor is the same, the obtained analog signal after voltage division is more accurate.
- the second digital signal value adc2 output by ADC 2 at this time is the digital signal value obtained by converting the second-level analog signal through PCM encoding using the A-law 13-fold line, that is, without using the A-law 13-fold line 16 times the value of the digital signal output by the method;
- ADC (adc1-1) ⁇ 16+adc2;
- ADC is the target digital signal
- adc1 is the first digital signal
- adc2 is the second digital signal.
- ADC adc2
- the digital signal value of high bit width can be obtained by sampling with two low bit width analog-to-digital converters, thereby improving the conversion precision of the digital signal.
- the number of voltage divider circuits in at least one voltage divider circuit in the analog-to-digital conversion circuit is multiple, that is, the analog-to-digital conversion circuit includes multiple voltage divider circuits and multiple second conversion circuits:
- connection mode of the voltage divider circuits 20 can be serial connection, parallel connection, part series connection and part parallel connection, which can be set according to actual needs in specific implementation.
- FIG. 1 it is an analog-to-digital conversion circuit provided by an embodiment of the present disclosure. It can be seen from Fig. 1 that a plurality of voltage dividing circuits 20 are connected in series, the first voltage dividing circuit divides the original analog signal, and the second voltage dividing circuit divides the analog signal after the second voltage dividing circuit Divide the pressure, and so on.
- each voltage dividing circuit is as described above, and will not be repeated here.
- the original analog signal is first input into the first conversion circuit, and the first conversion circuit converts the original analog signal to obtain the first digital signal, and the control calculation circuit determines to open the first voltage divider according to the first digital signal A switch tube in the circuit, after the original analog signal is divided by the voltage divider circuit, the first second-level analog signal is obtained, and the first second conversion circuit converts the first second-level analog signal according to the preset algorithm.
- the control calculation unit perform conversion to obtain the first second digital signal, control the calculation circuit to control the first second conversion circuit to stop receiving the analog signal, and determine to turn on a switch tube in the second voltage divider circuit according to the first second digital signal , the second voltage divider circuit receives the second-level analog signal output by the first voltage-divider circuit, divides the received second-level analog signal, and obtains the second second-level analog signal, and the second second-level analog signal.
- the conversion circuit converts the second second-level analog signal according to the preset algorithm to obtain the second second digital signal, and the control calculation unit determines to turn on one of the third voltage divider circuits according to the second second digital signal
- the control calculation unit finally determines the target digital signal according to the received first digital signal and at least one second digital signal.
- each second conversion circuit may be the same or different.
- FIG. 4 it is another analog-to-digital conversion circuit provided by an embodiment of the present disclosure. As can be seen from Figure 4, it includes 4 voltage divider circuits and 4 second conversion circuits, wherein the 4 voltage divider circuits are connected in parallel, and all input the original analog signal, that is, they all divide the original analog signal, and then The divided analog signals are input to respective corresponding second conversion circuits for conversion.
- the specific implementation method of this circuit can refer to the method in Figure 1, but the input of part of the voltage divider circuit in Figure 1 is the analog signal after the voltage division of the previous voltage divider circuit, and the input of each voltage divider circuit in Figure 4 is Raw analog signal.
- FIG. 5 it is another analog-to-digital conversion circuit provided by an embodiment of the present disclosure.
- the first voltage dividing circuit and the second voltage dividing circuit are connected in series, and the third voltage dividing circuit and the fourth voltage dividing circuit are connected in parallel.
- the switch tube mentioned in the above embodiments of the present invention may be a thin film transistor (TFT, Thin Film Transistor), or a metal oxide semiconductor field effect transistor (MOS, Metal Oxide Semiconductor), which is not limited here.
- TFT Thin Film Transistor
- MOS Metal Oxide Semiconductor
- the control terminals of the above-mentioned switching transistors are used as their gates, and depending on the type of transistor and the input signal, the first terminal can be used as a source, and the second terminal can be used as a drain; or the first terminal can be used as a drain pole, and the second end is used as the source, and no specific distinction is made here.
- multiple voltage dividing circuits are connected in parallel, as shown in Figure 4 and Figure 5, the input terminals of multiple voltage dividing circuits are connected to each other, and the output terminals of multiple voltage dividing circuits are indirectly connected to MCU, for example, each The output end of each voltage dividing circuit is connected to the input end of a second conversion circuit corresponding to it, and the output end of the second conversion circuit corresponding to it is connected to the MCU.
- this disclosure also provides an analog-to-digital conversion method, which is applied to any of the above-mentioned analog-to-digital conversion circuits.
- the problem-solving principle of this method is similar to that of the aforementioned analog-to-digital conversion circuit.
- the implementation of the digital conversion circuit will not be repeated here.
- the analog-to-digital conversion method provided by the present disclosure includes the following steps:
- the third bit width is greater than the first bit width, and the third bit width is greater than the second bit width.
- the original analog signal is converted by the first conversion circuit to obtain a digital signal of the first bit width
- the first-stage analog signal is divided by the voltage divider circuit to obtain the second-stage analog signal.
- the first-level analog signal is the original analog signal or the second-level analog signal obtained by the previous voltage-dividing circuit adjacent to the voltage-dividing circuit
- the second conversion circuit converts the received second-level analog signal according to a preset algorithm , to obtain the second digital signal with the second bit width, and finally according to the first digital signal and the second digital signal, obtain the target digital signal with the third bit width, the third bit width is greater than the first bit width, and the third bit width is greater than
- the second bit width because the bit width of the obtained target digital signal is greater than the bit width of the first digital signal obtained by the first conversion circuit, and also greater than the bit width of the second digital signal obtained by the second conversion circuit, so it is wider than the prior art
- the bit width of the output digital signal is large, so that the precision of the output digital signal can be improved.
- the number of voltage dividing circuits in at least one voltage dividing circuit is one;
- the step of dividing the first-level analog signal by one of the at least one voltage-dividing circuit to obtain the second-level analog signal includes:
- the first-level analog signal is divided by controlling the conduction of a switch in the voltage dividing circuit to obtain the second-level analog signal, wherein the first-level analog
- the signal is the original analog signal.
- multiple voltage dividing circuits in at least one voltage dividing circuit, and the multiple voltage dividing circuits are connected in series;
- the step of dividing the first-level analog signal by one of the at least one voltage-dividing circuit to obtain the second-level analog signal includes:
- the first level analog signal is divided to obtain the second level analog signal , wherein the first-level analog signal is a second-level analog signal output by a previous voltage dividing circuit adjacent to the one voltage dividing circuit.
- multiple voltage dividing circuits in at least one voltage dividing circuit, and the multiple voltage dividing circuits are connected in parallel;
- the step of dividing the first-level analog signal by one of the at least one voltage-dividing circuit to obtain the second-level analog signal includes:
- the first digital signal by controlling the conduction of a switch in one of the at least one voltage dividing circuit to divide the first level of analog signal, the second level of analog signal, wherein the first level analog signal is the original analog signal.
- the second stage analog a signal equal to said original analog signal
- the original analog signal is divided by controlling the conduction of a switch in the voltage dividing circuit to obtain the second stage analog signal.
- the obtaining the target digital signal of the third bit width according to the first digital signal and the second digital signal includes:
- the sum of the adjusted digital signal and the second digital signal is used as the target digital signal.
- the preset algorithm is an A-law 13-fold algorithm.
- an embodiment of the present disclosure further provides an integrated chip, where the integrated chip includes any one of the analog-to-digital conversion circuits described above.
- the problem-solving principle of the integrated chip is similar to that of the aforementioned analog-to-digital conversion circuit, so the implementation of the integrated chip can refer to the implementation of the aforementioned analog-to-digital conversion circuit, and the repetitions will not be repeated here.
- an embodiment of the present disclosure further provides a display device, which includes any one of the above integrated chips.
- the problem-solving principle of the display device is similar to the aforementioned analog-to-digital conversion circuit in the integrated chip, so the implementation of the display device can refer to the implementation of the aforementioned analog-to-digital conversion circuit in the integrated chip, and the repetitions will not be repeated here.
- the display device may be any product or component with a display function such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, and the like.
- a display function such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, and the like.
- Other essential components of the display device should be understood by those of ordinary skill in the art, and will not be repeated here, nor should they be used as limitations on the present disclosure.
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- 一种模数转换电路,其中,包括:第一转换电路,被配置为对原始模拟信号进行转换,得到第一位宽的第一数字信号;至少一个分压电路,针对每个分压电路,被配置为对第一级模拟信号进行分压,得到第二级模拟信号,其中,所述第一级模拟信号为所述原始模拟信号,或与分压电路相邻的上一个分压电路输出的第二级模拟信号;与分压电路对应的第二转换电路,被配置为根据预设算法对接收到的第二级模拟信号进行转换,得到第二位宽的第二数字信号;控制计算电路,被配置为根据所述第一数字信号和所述第二数字信号,得到第三位宽的目标数字信号;其中,所述第三位宽大于所述第一位宽,且所述第三位宽大于所述第二位宽。
- 根据权利要求1所述的电路,其中,所述分压电路包括多个分压电阻、与每个分压电阻对应的第一开关管;所述多个分压电阻串联连接;串联连接后的分压电阻中,每个分压电阻的第一端和与其对应的第一开关管的第一端连接;每个第一开关管的第二端相互连接,且和与所述分压电路对应的第二转换电路连接,每个第一开关管的控制端与所述控制计算电路连接;首个分压电阻的第一端用于输入所述第一级模拟信号,末个分压电阻的第二端接地。
- 根据权利要求2所述的电路,其中,所述至少一个分压电路中分压电路的数量为一个;所述第一级模拟信号为所述原始模拟信号。
- 根据权利要求2所述的电路,其中,所述至少一个分压电路中分压电 路的数量为多个,且多个分压电路串联连接;所述第一级模拟信号为与所述分压电路串联的上一个分压电路输出的第二级模拟信号。
- 根据权利要求2所述的电路,其中,所述至少一个分压电路中分压电路的数量为多个,且多个分压电路并联连接;所述第一级模拟信号为所述原始模拟信号。
- 根据权利要求2所述的电路,其中,所述控制计算电路,具体被配置为根据所述第一数字信号控制所述分压电路中至少一个分压电路的一个第一开关管导通。
- 根据权利要求2所述的电路,其中,所述第一转换电路包括所述第一位宽的第一模数转换器和第二开关管;所述第二开关管的第一端被配置为输入所述原始模拟信号,所述第二开关管的第二端与所述第一模数转换器的输入端电连接,所述第二开关管的控制端与所述控制计算电路电连接,所述第一模数转换器的输出端与所述控制计算电路电连接;所述控制计算电路具体被配置为,在第一采样时刻控制所述第二开关管导通,在第二采样时刻控制所述第二开关管断开,其中,所述第一采样时刻早于所述第二采样时刻。
- 根据权利要求7所述的电路,其中,所述第二转换电路包括所述第二模数转换器;所述第二模数转换器的输入端和与其对应的分压电路中的每个第一开关管的第二端电连接,所述第二模数转换器的输出端与所述控制计算电路电连接;所述控制计算电路具体被配置为,若所述第一数字信号在第一预设范围内,则在所述第二采样时刻控制与所述分压电路中的至少一个分压电路的首个分压电阻对应的第一开关管导通;若所述第一数字信号在第二预设范围内,则根据所述第一数字信号,在所述第二采样时刻控制所述分压电压中的至少 一个分压电路的一个第一开关管导通。
- 根据权利要求1所述的电路,其中,所述控制计算电路具体被配置为:基于预设值对所述第一数字信号进行调整;将调整后的数字信号与所述第二数字信号的和作为所述目标数字信号。
- 根据权利要求7所述的电路,其中,所述第一模数转换器的位宽等于所述第二模数转换器的位宽。
- 根据权利要求10所述的电路,其中,所述预设算法为A律13折线算法。
- 一种集成芯片,其中,包括如权利要求1-11任一所述的模数转换电路。
- 一种显示装置,其特征在于,包括如权利要求12所述的集成芯片。
- 一种模数转换方法,应用于权利要求1-11任一所述的电路,其中,包括:通过所述第一转换电路对接收到的原始模拟信号进行转换,得到第一位宽的第一数字信号;通过所述至少一个分压电路中的一个分压电路对第一级模拟信号进行分压,得到第二级模拟信号,其中,所述第一级模拟信号为所述原始模拟信号,或与所述一个分压电路相邻的上一个分压电路得到的第二级模拟信号;通过所述第二转换电路根据预设算法对接收到的第二级模拟信号进行转换,得到第二位宽的第二数字信号;根据所述第一数字信号和所述第二数字信号,得到第三位宽的目标数字信号;其中,所述第三位宽大于所述第一位宽,且,所述第三位宽大于所述第二位宽。
- 根据权利要求14所述的方法,其中,所述至少一个分压电路中分压电路的数量为一个;所述通过所述至少一个分压电路中的一个分压电路对第一级模拟信号进 行分压,得到第二级模拟信号,包括:根据所述第一数字信号,通过控制分压电路中的一个开关管的导通对所述第一级模拟信号进行分压,得到所述第二级模拟信号,其中,所述第一级模拟信号为所述原始模拟信号。
- 根据权利要求14所述的方法,其中,所述至少一个分压电路中分压电路的数量为多个,且多个分压电路串联连接;所述通过所述至少一个分压电路中的一个分压电路对第一级模拟信号进行分压,得到第二级模拟信号,包括:根据所述第一数字信号,通过控制所述至少一个分压电路中的一个分压电路的一个开关管的导通对所述第一级模拟信号进行分压,得到所述第二级模拟信号,其中,所述第一级模拟信号为与所述一个分压电路相邻的上一个分压电路输出的第二级模拟信号。
- 根据权利要求14所述的方法,其中,所述至少一个分压电路中分压电路的数量为多个,且多个分压电路并联连接;所述通过所述至少一个分压电路中的一个分压电路对第一级模拟信号进行分压,得到第二级模拟信号,包括:根据所述第一数字信号,通过控制所述至少一个分压电路中的一个分压电路中的一个开关管的导通对所述第一级模拟信号进行分压,得到所述第二级模拟信号,其中,所述第一级模拟信号为所述原始模拟信号。
- 根据权利要求14所述的方法,其中,若所述第一数字信号在第一预设范围内,则通过控制所述至少一个分压电路中的一个分压电路中的一个开关管的导通使所述第二级模拟信号等于所述原始模拟信号;若所述第一数字信号在第二预设范围内,则根据所述第一数字信号,通过控制所述至少一个分压电路中的一个分压电路中的一个开关管的导通对所述原始模拟信号进行分压,得到所述第二级模拟信号。
- 根据权利要求14所述的方法,其中,所述根据所述第一数字信号和所述第二数字信号,得到所述第三位宽的目标数字信号,包括:基于预设值对所述第一数字信号进行调整;将调整后的数字信号与所述第二数字信号的和作为所述目标数字信号。
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060158362A1 (en) * | 2003-10-21 | 2006-07-20 | Fujitsu Limited | D/A conversion circuit and A/D conversion circuit |
US20090033534A1 (en) * | 2007-07-31 | 2009-02-05 | Sanyo Electric Co. Ltd | Analog-to-digital converter for converting input analog signal into digital signal through multiple conversion processings |
CN104300984A (zh) * | 2014-10-21 | 2015-01-21 | 上海玮舟微电子科技有限公司 | 一种模数转换器和模数转换方法 |
CN104852742A (zh) * | 2014-02-14 | 2015-08-19 | 英飞凌科技股份有限公司 | 模数转换 |
CN108649954A (zh) * | 2018-07-05 | 2018-10-12 | 成都信息工程大学 | 一种游标式高精度高速a/d转换装置 |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060158362A1 (en) * | 2003-10-21 | 2006-07-20 | Fujitsu Limited | D/A conversion circuit and A/D conversion circuit |
US20090033534A1 (en) * | 2007-07-31 | 2009-02-05 | Sanyo Electric Co. Ltd | Analog-to-digital converter for converting input analog signal into digital signal through multiple conversion processings |
CN104852742A (zh) * | 2014-02-14 | 2015-08-19 | 英飞凌科技股份有限公司 | 模数转换 |
CN104300984A (zh) * | 2014-10-21 | 2015-01-21 | 上海玮舟微电子科技有限公司 | 一种模数转换器和模数转换方法 |
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