CN106357566B - A kind of encoded signal production method and system - Google Patents
A kind of encoded signal production method and system Download PDFInfo
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- CN106357566B CN106357566B CN201610749514.6A CN201610749514A CN106357566B CN 106357566 B CN106357566 B CN 106357566B CN 201610749514 A CN201610749514 A CN 201610749514A CN 106357566 B CN106357566 B CN 106357566B
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Abstract
The invention discloses a kind of encoded signal generation system and methods, for easily realizing the generation of encoded signal and improving the encoded signal quality generated, which includes: control module, waveform memory module, digital-to-analogue conversion module and Linear Amplifer module；Control module generates the first digitally encoded signal for simulating；The first digitally encoded signal is quantified according to the number of significant digit of digital-to-analogue conversion module, generates the second digitally encoded signal；Waveform memory module, for storing the second digitally encoded signal；Digital-to-analogue conversion module, for reading the second digitally encoded signal, the second digitally encoded signal being converted to the first analog encoding signal when receiving the control instruction for needing to generate encoded signal；Linear Amplifer module generates the second analog encoding signal, exports the second analog encoding signal for the voltage linear of the first analog encoding signal to be amplified to voltage preset range.
Description
Technical field
The present invention relates to medical ultrasonic technical fields, and in particular to a kind of encoded signal production method and system.
Background technique
Medical ultrasound image technology is when being propagated in human body different tissues using ultrasonic wave, and the acoustic feature presented is poor
The different image to obtain organization internal has noninvasive, the real-time dynamic imaging of safety, simple operation and other advantages.Work as ultrasonic signal
When propagating from skin surface to inside of human body, the acoustic impedance and attenuation characteristic difference of different tissues organ can generate sound wave different
The reflection and decaying of degree, cause the information such as amplitude, the phase of echo-signal to change.Medical ultrasound image technology is by echo
The information that signal carries is converted into the pixel with different gray values, and carries out imaging and show, to obtain the sound of human body section
As figure, the differentiation of organ, lesion tissue information can be realized by observing ultrasonogram.In order to obtain clearly image, guarantee to examine
Disconnected accuracy needs medical ultrasonic imaging system to have high resolving power.
In the prior art, the pulse compression technique that can use communication emits the coded pulse signal of long duration
Replace conventional single carrier, short pulse signal, to achieve the purpose that improve resolving power and penetration power.In the prior art, it proposes
A kind of encoded signal production method based on tri-state impulse generator, carries out coding generation according to the needs of actual waveform first
Symbol is controlled, the then shock response of estimating system is corrected according to control symbol of this shock response to generation；Another party
Face is higher due to signal voltage, it is also desirable to carry out balance optimizing according to any encoded signal of the system shock response to input；Most
Afterwards by the symbol after correction and the signal after equilibrium by symbol quantizer, encoded signal required for generating.But it is based on three
Any encoded signal production method of state impulse generator needs estimating system shock response and subsequent symbol correction balanced,
Realize that complexity is not readily understood, additionally due to the encoded signal of generation needs balance optimizing and ideal using the method for approximate evaluation
Encoded signal ratioing signal it is second-rate.
Summary of the invention
In view of this, the present invention provides a kind of encoded signal production method and system, to solve coding letter in the prior art
Number generation realize complicated and poor signal quality technical problem.
To solve the above problems, technical solution provided by the invention is as follows:
A kind of encoded signal generation system, the system comprises:
Control module, waveform memory module, digital-to-analogue conversion module and Linear Amplifer module；
The control module generates the first digitally encoded signal for simulating；According to the digital-to-analogue conversion module
Number of significant digit quantifies first digitally encoded signal, generates the second digitally encoded signal；
The waveform memory module, for storing second digitally encoded signal；
The digital-to-analogue conversion module, for reading institute when receiving the control instruction for needing to generate encoded signal
The second digitally encoded signal is stated, second digitally encoded signal is converted into the first analog encoding signal；
The Linear Amplifer module presets model for the voltage linear of the first analog encoding signal to be amplified to voltage
It encloses, generates the second analog encoding signal, export the second analog encoding signal.
Correspondingly, the control module includes the first control submodule and the second control submodule；
First control submodule generates the first digitally encoded signal for simulating；According to the digital-to-analogue conversion
The number of significant digit of module quantifies first digitally encoded signal, generates the second digitally encoded signal；By described second
Digitally encoded signal is sent to second control submodule；
Second control submodule, for second digitally encoded signal to be sent to the waveform memory module.
Correspondingly, first control submodule, is also used to send waveform storage address to second control submodule,
The Waveform storage address is storage address of second digitally encoded signal in the waveform memory module；
Second control submodule is also used to the Waveform storage address being sent to the waveform memory module；
The waveform memory module is specifically used for storing the second digital coding letter according to the Waveform storage address
Number.
Correspondingly, first control submodule, is also used to send needs generation coding to second control submodule
The control instruction of signal, the control instruction for needing to generate encoded signal include the Waveform storage address；
Second control submodule is also used to the control instruction for needing to generate encoded signal being sent to the number
Word analog conversion module；
The digital-to-analogue conversion module is specifically used for: when receiving the control instruction for needing to generate encoded signal, root
Second digitally encoded signal is read from the waveform memory module according to the Waveform storage address, second number is compiled
Code signal is converted to the first analog encoding signal.
Correspondingly, first control submodule, is also used to send amplification control parameter to second control submodule；
Second control submodule is also used to the amplification control parameter being sent to the Linear Amplifer module；
The Linear Amplifer module, specifically for according to the amplification control parameter by the first analog encoding signal
Voltage linear is amplified to voltage preset range, generates the second analog encoding signal, exports the second analog encoding signal.
Correspondingly, the waveform memory module is set in the digital-to-analogue conversion module.
Correspondingly, first control submodule is realized by computer, second control submodule is by field-programmable
Gate array FPGA is realized.
A kind of encoded signal production method, simulation generate the first digitally encoded signal；According to digital-to-analogue conversion module
Number of significant digit quantifies first digitally encoded signal, generates the second digitally encoded signal；Store second number
Encoded signal；The described method includes:
When receiving the control instruction for needing to generate encoded signal, by described in digital-to-analogue conversion module reading
Second digitally encoded signal is converted to the first analog encoding signal by the second digitally encoded signal；
The voltage linear of the first analog encoding signal is amplified to voltage preset range, generates the second analog encoding letter
Number, export the second analog encoding signal.
Correspondingly, storage second digitally encoded signal, comprising:
Second digitally encoded signal is stored according to Waveform storage address；
It is described when receiving the control instruction for needing to generate encoded signal, pass through the digital-to-analogue conversion module read
Second digitally encoded signal reads second digitally encoded signal by the digital-to-analogue conversion module, comprising:
The control instruction for needing to generate encoded signal includes the Waveform storage address, needs to generate volume when receiving
When the control instruction of code signal, second number is read according to the Waveform storage address by the digital-to-analogue conversion module
Word encoded signal.
Correspondingly, the voltage linear by the first analog encoding signal is amplified to voltage preset range, the is generated
Two analog encoding signals, comprising:
The voltage linear of the first analog encoding signal is amplified to voltage preset range according to amplification control parameter, it is raw
At the second analog encoding signal.
It can be seen that the embodiment of the present invention has the following beneficial effects:
Simulation generates ideal any encoded signal and stores after quantization the embodiment of the present invention according to actual needs first,
The digitally encoded signal that storage is read when actual needs generates encoded signal, by digital-to-analogue conversion module by digital coding
Signal is converted to analog encoding signal, and the analog encoding signal of low pressure is amplified to symbol without distortions using Linear Amplifer module
High pressure simulation encoded signal actually required is closed, the generation process of any encoded signal is completed, is easily understood in the Principle of Process,
Complicated algorithm estimating system shock response etc. is not needed, being emitted again by the storage of signal keeps the signal quality of generation higher,
And realization is upper simple and easy to do, does not need the optimization such as to carry out signal equilibrium and correct repeatedly, mainly by digital-to-analogue conversion mould
Encoded signal generation can be realized in block and Linear Amplifer module, and cost is relatively low.
Detailed description of the invention
Fig. 1 is the schematic diagram of the encoded signal generation system embodiment one provided in the embodiment of the present invention；
Fig. 2 is the schematic illustration of the encoded signal generation system embodiment provided in the embodiment of the present invention；
Fig. 3 is the schematic diagram of the encoded signal generation system embodiment two provided in the embodiment of the present invention；
Fig. 4 is the flow chart of the encoded signal production method embodiment provided in the embodiment of the present invention.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Mode is applied to be described in further detail the embodiment of the present invention.
Encoded signal generation system embodiment one shown in Figure 1, providing in the embodiment of the present invention may include:
Control module 101, waveform memory module 102, digital-to-analogue conversion module 103 and Linear Amplifer module 104.
Wherein, control module 101 can be used for simulating the first digitally encoded signal of generation；According to digital-to-analogue conversion mould
The number of significant digit of block quantifies the first digitally encoded signal, generates the second digitally encoded signal.
Waveform memory module 102 can be used for storing the second digitally encoded signal.
Digital-to-analogue conversion module 103 can be used for when receiving the control instruction for needing to generate encoded signal, read
Second digitally encoded signal is converted to the first analog encoding signal by the second digitally encoded signal.
Linear Amplifer module 104 can be used for for the voltage linear of the first analog encoding signal being amplified to voltage and preset model
It encloses, generates the second analog encoding signal, export the second analog encoding signal.
It is shown in Figure 2, show the operation principle schematic diagram of encoded signal generation system provided in this embodiment.
Firstly, control module, which can use MATLAB simulation, generates the first digitally encoded signal, the first digitally encoded signal
With medical ultrasound system sample frequency actually required；Then by generated ideal signal (i.e. the first digitally encoded signal) into
Row quantization, quantization need to be carried out according to used according to the number of significant digit of digital-to-analogue conversion module, such as according to digital mould
The number of significant digit of quasi- conversion module is 8, i.e., indicates decimal integer with 8 bits, can represent -128~127 it
Between integer value, that is, 256 quantized levels then can carry out the first digitally encoded signal to be up to 256 quantized levels
Quantization；The second digitally encoded signal generated after quantization is stored in waveform memory module.During storage, control
Module can distribute corresponding Waveform storage address for the second digitally encoded signal, and waveform memory module is according to Waveform storage address
The second digitally encoded signal is stored, the second different digitally encoded signals is stored in different Waveform storage addresses.
When needing to generate encoded signal, it includes Waveform storage that control module can also be sent to digital-to-analogue conversion module
The control instruction for needing to generate encoded signal of address, digital-to-analogue conversion module read second according to Waveform storage address first
Digitally encoded signal, the second digitally encoded signal carries out DAC, and (Digital-to-Analog Converter, digital simulation turn
Change) the first analog encoding signal is converted to, realize the generation of any encoded signal of low pressure；Finally by the first analog encoding signal
Voltage linear is amplified to medicine detection institute voltage actually required, generates the second analog encoding signal.In the process of voltage amplification
In, control module can send amplification control parameter to Linear Amplifer module, and amplification control parameter may include that voltage presets model
The parameters such as enclose, so that Linear Amplifer module carries out voltage amplification according to amplification control parameter.
In this way, simulation generates ideal any encoded signal and deposits after quantization the present embodiment according to actual needs first
The digitally encoded signal of storage is read in storage when actual needs generates encoded signal, will be digital by digital-to-analogue conversion module
Encoded signal is converted to analog encoding signal, amplifies the analog encoding signal of low pressure without distortions using Linear Amplifer module
To the high pressure simulation encoded signal to correspond to actual needs, the generation process of any encoded signal is completed, it is simple in the Principle of Process
It is understandable, complicated algorithm estimating system shock response etc. is not needed, emits the signal quality for making to generate again by the storage of signal
It is higher, and realization is upper simple and easy to do, does not need the optimization such as to carry out signal equilibrium and correct repeatedly, mainly passes through digital simulation and turn
Encoded signal generation can be realized in mold changing block and Linear Amplifer module, and cost is relatively low.
In some possible implementations of the invention, control module may include the first control submodule and second
Control submodule；First control submodule can be realized that the second control submodule can be by FPGA (Field by computer
Programmable Gate Array, field programmable gate array) it realizes；Waveform memory module can be set in digital simulation
In conversion module；Digital-to-analogue conversion module can be realized that Linear Amplifer module can be by linear amplifier module by DAC chip
It realizes.Faster by FPGA and DAC chip interactive speed, it can satisfy the requirement of real-time of encoded signal generation.
Encoded signal generation system embodiment two shown in Figure 3, providing in the embodiment of the present invention may include:
Computer 301, FPGA302, DAC chip 303 and linear amplifier 304.
The working principle of encoded signal generation system provided in this embodiment is:
First control submodule, which can be simulated, generates the first digitally encoded signal；According to the effective of digital-to-analogue conversion module
Digit quantifies the first digitally encoded signal, generates the second digitally encoded signal；Second digitally encoded signal is sent to
Second control submodule.That is the first control submodule can use MATLAB and generate the first number according to the actual sample frequency of system
First digitally encoded signal, is then quantified as the second digitally encoded signal of Nbit by word encoded signal, and N is having for DAC chip
Digit is imitated, above-mentioned second digitally encoded signal can be stored to the RAM to the second control submodule FPGA in practical applications
In (Random Access Memory, random access memory).
Then the second digitally encoded signal can be sent to waveform memory module, Waveform storage mould by the second control submodule
Block can be set in digital-to-analogue conversion module.In practical applications, waveform memory module can be the RAM of DAC chip, this
Sample, FPGA can be counted second after quantization by SPI (Serial Peripheral Interface, Serial Peripheral Interface (SPI))
Word encoded signal is stored into the RAM of DAC chip.
During storage, the first control submodule can also send waveform storage address to the second control submodule,
Waveform storage address is sent to waveform memory module by the second control submodule；Then waveform memory module can be according to Waveform storage
Address stores the second digitally encoded signal, and Waveform storage address is storage of second digitally encoded signal in waveform memory module
Address, the second different digitally encoded signals can store in different Waveform storage addresses.
When needing to generate encoded signal, the first control submodule, which is also used to send to the second control submodule, to be needed to generate
The control instruction of encoded signal, the control instruction for needing to generate encoded signal includes Waveform storage address；Second control submodule
It is also used to the control instruction for needing to generate encoded signal being sent to digital-to-analogue conversion module；Then digital-to-analogue conversion module is worked as
When receiving the control instruction for needing to generate encoded signal, the second number is read from waveform memory module according to Waveform storage address
Second digitally encoded signal is converted to the first analog encoding signal by encoded signal.
Finally, the first control submodule can also send amplification control parameter to the second control submodule；Second control
Module is sent to Linear Amplifer module for control parameter is amplified；Linear Amplifer module compiles the first simulation according to amplification control parameter
The voltage linear of code signal is amplified to voltage preset range, generates the second analog encoding signal, exports the second analog encoding signal,
Complete the generation of any encoded signal.
In the present embodiment, computer, which will be responsible for the control of system and the generation of ideal coding signal, quantization, FPGA, to control
System instruction is issued to DAC chip；DAC chip is responsible for converting digital signals into the recovery that analog signal completes encoded signal, and
Analog encoding signal is sent to linear amplifier；Linear amplifier is responsible for the analog encoding linearly for exporting DAC chip
It is amplified to high voltage level actually required.
In this way, simulation generates ideal any encoded signal and deposits after quantization the present embodiment according to actual needs first
The digitally encoded signal of storage is read in storage when actual needs generates encoded signal, will be digital by digital-to-analogue conversion module
Encoded signal is converted to analog encoding signal, amplifies the analog encoding signal of low pressure without distortions using Linear Amplifer module
To the high pressure simulation encoded signal to correspond to actual needs, the generation process of any encoded signal is completed, it is simple in the Principle of Process
It is understandable, complicated algorithm estimating system shock response etc. is not needed, emits the signal quality for making to generate again by the storage of signal
It is higher, and realization is upper simple and easy to do, does not need the optimization such as to carry out signal equilibrium and correct repeatedly, mainly passes through digital simulation and turn
Encoded signal generation can be realized in mold changing block and Linear Amplifer module, and cost is relatively low.
It may include following step correspondingly, also providing a kind of encoded signal production method embodiment in the embodiment of the present invention
It is rapid:
Step 401: simulation generates the first digitally encoded signal；According to the number of significant digit of digital-to-analogue conversion module to first
Digitally encoded signal is quantified, and the second digitally encoded signal is generated.
It can use control module simulation in practical applications and generate the first digitally encoded signal；According to digital-to-analogue conversion
The number of significant digit of module quantifies the first digitally encoded signal, generates the second digitally encoded signal.Control module can be with
Waveform storage address is sent to waveform memory module, when needing to generate encoded signal, sends and wraps to digital-to-analogue conversion module
The control instruction for needing to generate encoded signal is included, the control instruction for needing to generate encoded signal may include Waveform storage address.
Control module can also send amplification control parameter to Linear Amplifer module.
Step 402: the second digitally encoded signal of storage.
It can use waveform memory module and store the second digitally encoded signal, specifically, can be according to Waveform storage address
Store the second digitally encoded signal.
Step 403: when receiving the control instruction for needing to generate encoded signal, being read by digital-to-analogue conversion module
Second digitally encoded signal is converted to the first analog encoding signal by the second digitally encoded signal.
In some possible implementations of the invention, the control instruction for needing to generate encoded signal may include waveform
Storage address, the specific implementation of this step can be to pass through number when receiving the control instruction for needing to generate encoded signal
Analog conversion module reads the second digitally encoded signal according to Waveform storage address.Namely it can use number in practical applications
Analog conversion module realizes this step.
Step 404: the voltage linear of the first analog encoding signal being amplified to voltage preset range, the second simulation is generated and compiles
Code signal exports the second analog encoding signal.
In some possible implementations of the invention, the specific implementation of this step can amplify control ginseng according to
The voltage linear of first analog encoding signal is amplified to voltage preset range by number, generates the second analog encoding signal.Namely
It can use Linear Amplifer module in practical application and realize this step.
In this way, simulation generates ideal any encoded signal and deposits after quantization the present embodiment according to actual needs first
The digitally encoded signal of storage is read in storage when actual needs generates encoded signal, will be digital by digital-to-analogue conversion module
Encoded signal is converted to analog encoding signal, amplifies the analog encoding signal of low pressure without distortions using Linear Amplifer module
To the high pressure simulation encoded signal to correspond to actual needs, the generation process of any encoded signal is completed, it is simple in the Principle of Process
It is understandable, complicated algorithm estimating system shock response etc. is not needed, emits the signal quality for making to generate again by the storage of signal
It is higher, and realization is upper simple and easy to do, does not need the optimization such as to carry out signal equilibrium and correct repeatedly, mainly passes through digital simulation and turn
Encoded signal generation can be realized in mold changing block and Linear Amplifer module, and cost is relatively low.
It should be noted that each embodiment in this specification is described in a progressive manner, each embodiment emphasis is said
Bright is the difference from other embodiments, and the same or similar parts in each embodiment may refer to each other.For reality
For applying system or device disclosed in example, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, phase
Place is closed referring to method part illustration.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can directly be held with hardware, processor
The combination of capable software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of encoded signal generation system, which is characterized in that the system comprises:
Control module, waveform memory module, digital-to-analogue conversion module and Linear Amplifer module；
The control module generates the first digitally encoded signal for simulating；According to the effective of the digital-to-analogue conversion module
Digit quantifies first digitally encoded signal, generates the second digitally encoded signal；
The waveform memory module, for storing second digitally encoded signal；
The digital-to-analogue conversion module reads described for when receiving the control instruction for needing to generate encoded signal
Second digitally encoded signal is converted to the first analog encoding signal by two digitally encoded signals；
The Linear Amplifer module, for the voltage linear of the first analog encoding signal to be amplified to voltage preset range,
The second analog encoding signal is generated, the second analog encoding signal is exported.
2. system according to claim 1, which is characterized in that the control module includes the first control submodule and the
Two control submodules；
First control submodule generates the first digitally encoded signal for simulating；According to the digital-to-analogue conversion module
Number of significant digit first digitally encoded signal is quantified, generate the second digitally encoded signal；By second number
Encoded signal is sent to second control submodule；
Second control submodule, for second digitally encoded signal to be sent to the waveform memory module.
3. system according to claim 2, which is characterized in that
First control submodule is also used to send waveform storage address to second control submodule, and the waveform is deposited
Storage address is storage address of second digitally encoded signal in the waveform memory module；
Second control submodule is also used to the Waveform storage address being sent to the waveform memory module；
The waveform memory module is specifically used for storing second digitally encoded signal according to the Waveform storage address.
4. system according to claim 3, which is characterized in that
First control submodule, the control for being also used to need to generate to second control submodule transmission encoded signal refer to
It enables, the control instruction for needing to generate encoded signal includes the Waveform storage address；
Second control submodule is also used to for the control instruction for needing to generate encoded signal being sent to the digital mould
Quasi- conversion module；
The digital-to-analogue conversion module is specifically used for: when receiving the control instruction for needing to generate encoded signal, according to institute
It states Waveform storage address and reads second digitally encoded signal from the waveform memory module, second digital coding is believed
Number be converted to the first analog encoding signal.
5. system according to claim 2, which is characterized in that
First control submodule is also used to send amplification control parameter to second control submodule；
Second control submodule is also used to the amplification control parameter being sent to the Linear Amplifer module；
The Linear Amplifer module, specifically for according to the amplification control parameter by the voltage of the first analog encoding signal
Linear Amplifer generates the second analog encoding signal to voltage preset range, exports the second analog encoding signal.
6. according to the described in any item systems of claim 2-4, which is characterized in that the waveform memory module is set to the number
In word analog conversion module.
7. according to the described in any item systems of claim 2-5, which is characterized in that first control submodule is by computer reality
Existing, second control submodule is realized by on-site programmable gate array FPGA.
8. a kind of encoded signal production method, which is characterized in that simulation generates the first digitally encoded signal；Turned according to digital simulation
The number of significant digit of mold changing block quantifies first digitally encoded signal, generates the second digitally encoded signal；Described in storage
Second digitally encoded signal；The described method includes:
When receiving the control instruction for needing to generate encoded signal, described second is read by the digital-to-analogue conversion module
Second digitally encoded signal is converted to the first analog encoding signal by digitally encoded signal；
The voltage linear of the first analog encoding signal is amplified to voltage preset range, generates the second analog encoding signal,
Export the second analog encoding signal.
9. according to the method described in claim 8, it is characterized in that, storage second digitally encoded signal, comprising:
Second digitally encoded signal is stored according to Waveform storage address；
It is described when receiving the control instruction for needing to generate encoded signal, by the digital-to-analogue conversion module read described in
Second digitally encoded signal reads second digitally encoded signal by the digital-to-analogue conversion module, comprising:
The control instruction for needing to generate encoded signal includes the Waveform storage address, needs to generate coding letter when receiving
Number control instruction when, by the digital-to-analogue conversion module according to the Waveform storage address read it is described second number compile
Code signal.
10. according to the method described in claim 8, it is characterized in that, the pressure-wire by the first analog encoding signal
Property be amplified to voltage preset range, generate the second analog encoding signal, comprising:
The voltage linear of the first analog encoding signal is amplified to voltage preset range according to amplification control parameter, generates the
Two analog encoding signals.
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|---|---|---|---|---|
| EP0863607B1 (en) * | 1997-03-03 | 2002-11-06 | Agilent Technologies, Inc. (a Delaware corporation) | Method and apparatus for linearizing an efficient class D/E power amplifier using delta modulation |
| CN101094042A (en) * | 2006-06-19 | 2007-12-26 | 上海国皓电子有限公司 | Wireless digital transmitting set based on AVS source coding |
| CN104135664A (en) * | 2014-07-01 | 2014-11-05 | 宁波摩米创新工场电子科技有限公司 | Method for digital processing of medical image |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0863607B1 (en) * | 1997-03-03 | 2002-11-06 | Agilent Technologies, Inc. (a Delaware corporation) | Method and apparatus for linearizing an efficient class D/E power amplifier using delta modulation |
| CN101094042A (en) * | 2006-06-19 | 2007-12-26 | 上海国皓电子有限公司 | Wireless digital transmitting set based on AVS source coding |
| CN104135664A (en) * | 2014-07-01 | 2014-11-05 | 宁波摩米创新工场电子科技有限公司 | Method for digital processing of medical image |
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