CN102087302A - Signal generator - Google Patents
Signal generator Download PDFInfo
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- CN102087302A CN102087302A CN2010105433453A CN201010543345A CN102087302A CN 102087302 A CN102087302 A CN 102087302A CN 2010105433453 A CN2010105433453 A CN 2010105433453A CN 201010543345 A CN201010543345 A CN 201010543345A CN 102087302 A CN102087302 A CN 102087302A
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Abstract
The invention discloses a signal generator which comprises an upper computer, a memory, a single chip, a waveform generator, a bias generating circuit and a superimposed circuit, wherein the memory is in bidirectional connection with the single chip and used for storing the setting conditions; the upper computer is connected with the single chip and used for inputting, changing and selecting the setting conditions; the waveform generator is connected with the single chip which controls the waveform generator to generate waveform; the bias generating circuit is used for generating bias voltage; and the superimposed circuit is used for superimposing the waveform on the bias voltage generated by the bias generating circuit so as to form the required waveform signal. The signal generator disclosed by the invention is of a simple structure and low in manufacturing cost.
Description
Technical field
The present invention relates to ic test technique, relate in particular to a kind of signal generator.
Background technology
Often run into such situation in integrated circuit testing: former device to be tested is the device that can drive a plurality of peripheral components work, under different frequency of operation and supply voltage, the different peripheral components switch work of former device control that this is to be tested, realize voltage detecting control switching, and the supply voltage that test machine provides for chip is the constant DC pressure, for example, former device to be tested can drive two peripheral components (being called first peripheral components and second peripheral components) work, in the high-low level condition of a certain frequency and bias voltage, former device to be tested drives the first peripheral components work, in the high-low level condition of difference/same frequency or difference/identical bias voltage, former device to be tested drives the second peripheral components work, and the supply voltage that test machine provides is DC voltage (not having waveform), for reaching test purpose, also need to produce signal generator with waveform signal.Signal generator complex structure of the prior art, manufacturing cost height.
Summary of the invention
The object of the present invention is to provide a kind of signal generator, overlaid waveforms on bias voltage produces the signal with various waveforms, its simple in structure, low cost of manufacture.
To achieve the above object, the invention provides a kind of signal generator, comprise host computer, storer, single-chip microcomputer, waveform generator, bias generation circuit and supercircuit; Described storer is connected with described single-chip microcomputer is two-way, and this storer is used for preserving the condition that is provided with; Described host computer is connected with described single-chip microcomputer, this host computer be used for the input condition is set, change is provided with condition and selection is provided with condition; Described waveform generator is connected with described single-chip microcomputer, controls it by described single-chip microcomputer according to the condition of selecting that is provided with and produces waveform; Described bias generation circuit is connected with described supercircuit, and described supercircuit is used for the described waveform bias voltage that described bias generation circuit produces that is added to, to form the signal of the waveform that needs.
Above-mentioned signal generator, wherein, also comprise amplitude adjusting circuit and D/A converter, described amplitude adjusting circuit is arranged between described waveform generator and the described supercircuit, described D/A converter links to each other with described amplitude adjusting circuit, the waveform that the output signal of the described D/A converter that described amplitude adjusting circuit will receive and described waveform generator produce is integrated, carry out amplitude according to certain input/output relation and regulate, and to regulate waveform behind the amplitude as the waveform on the described bias voltage that is added to.
Above-mentioned signal generator, wherein, the degree of regulation of described amplitude adjusting circuit is ± 2mV.
Above-mentioned signal generator wherein, also comprises driving circuit, and described driving circuit is connected with described supercircuit, and this driving circuit is used to increase the power of described supercircuit output signal.
Above-mentioned signal generator, wherein, the described various parameters that the described waveform generator of conditional definition is set.
Above-mentioned signal generator, wherein, described waveform generator produces square wave, triangular wave, sine wave or cosine wave (CW).
Above-mentioned signal generator, wherein, the frequency-tuning range of the waveform that described waveform generator produces is 1Hz～10MHz, degree of regulation is in 1KHz.
Above-mentioned signal generator, wherein, the waveform that described waveform generator produces is reference point with 0V, amplitude is ± 1V.
Above-mentioned signal generator, wherein, described bias generation circuit and described supercircuit realize waveform is superimposed upon-18V～+ voltage of 18V on.
Simple in structure and the most circuit component of signal generator of the present invention can adopt the chip that can buy on the market, price is not high, greatly reduces the low cost of manufacture of signal generator.
Description of drawings
Signal generator of the present invention is provided by following embodiment and accompanying drawing.
Fig. 1 is the structural representation of signal generator embodiment one of the present invention.
Fig. 2 is the structural representation of signal generator embodiment two of the present invention.
Fig. 3 is the structural representation of signal generator embodiment three of the present invention.
Embodiment
Below with reference to Fig. 1～Fig. 3 signal generator of the present invention is described in further detail.
Embodiment one:
Referring to Fig. 1, the signal generator of present embodiment comprises host computer 100, storer 200, single-chip microcomputer 300, waveform generator 400, bias generation circuit 500 and supercircuit 600;
Described storer 200 and described 300 two-way connections of single-chip microcomputer, this storer 200 are used for preserving the condition that is provided with;
The described various parameters that the described waveform generator 400 of conditional definition is set, for example type of waveform, frequency etc.;
Described host computer 100 is connected with described single-chip microcomputer 300, this host computer 100 be used for the input condition is set, change is provided with condition and selection is provided with condition;
The original condition that is provided with that is kept in the described storer 200 is imported by described host computer 100, and is saved in the described storer 200 by described single-chip microcomputer 300;
Described host computer 100 can be by the condition that is provided with in the described storer 200 of described single-chip microcomputer 300 changes, and the condition that is provided with after will changing is kept in the described storer 200;
More than one of the condition that is provided with of preserving in the described storer 200, the different described waveform generators 400 of conditional decision that are provided with produce waveform dissimilar, different frequency;
Described waveform generator 400 is connected with described single-chip microcomputer 300, the described waveform generator 400 of described single-chip microcomputer 300 controls produces waveform, specifically, the condition that the is provided with selection instruction that described single-chip microcomputer 300 sends according to described host computer 100, from described storer 200, read out the corresponding setting condition, and control the corresponding waveform of described waveform generator 400 generations according to the condition of choosing that is provided with;
Utilize the described waveform generator 400 of described single-chip microcomputer 300 may command to produce square wave, triangular wave, sine wave, cosine wave (CW) etc., frequency-tuning range is 1Hz～10MHz, and degree of regulation is in 1KHz;
The waveform that described waveform generator 400 produces is reference point with 0V, and amplitude is ± 1V;
Described bias generation circuit 500 is used to produce bias voltage, this bias generation circuit 500 can be connected with described single-chip microcomputer 300, it produces the size of bias voltage by described single-chip microcomputer 300 controls, also can otherwise control the size that this bias generation circuit 500 produces bias voltage, in the present embodiment, this bias generation circuit 500 is connected with described single-chip microcomputer 300;
Described supercircuit 600 is connected with described bias generation circuit 500 with described waveform generator 400 respectively, and described supercircuit 600 is used for the waveform that the described waveform generator 400 of stack produces on the bias voltage that described bias generation circuit 500 produces;
Described bias generation circuit and described supercircuit realize waveform is superimposed upon-18V～+ voltage of 18V on.
It is not reference point with 0V that the signal generator of present embodiment can produce, have the voltage signal of waveform.
Simple in structure and the most circuit component of the signal generator of present embodiment can adopt the chip that can buy on the market, price is not high, greatly reduces the low cost of manufacture of signal generator.
Described storer 200 for example adopt flash memory (Flash), electric signal EPROM (Erasable Programmable Read Only Memory) (Electrically Erasable Programmable Read-Only Memory, EEPROM);
Described single-chip microcomputer 300 for example adopts the single-chip microcomputer PIC18F4550 chip of the band usb communication interface of Microchip company;
Described waveform generator 400 for example adopts the MAX038 chip.
Embodiment two:
As shown in Figure 2, embodiment two is with the difference of embodiment one, sets up an amplitude adjusting circuit 700, one A/D converters 710 and link to each other with described amplitude adjusting circuit 700 between described waveform generator 400 and described supercircuit 600;
Since the amplitude of the waveform that described waveform generator 400 produces certain (± 1V), be difficult to satisfy the demand of practical application, in order to improve the applicability of signal generator, preferably can make the amplitude of waveform adjustable, described amplitude adjusting circuit 700 is used to regulate amplitude of wave form;
The waveform that the output signal of the described D/A converter 710 that described amplitude adjusting circuit 700 will receive and described waveform generator 400 produce is integrated, and carries out amplitude according to certain input/output relation and regulates, and degree of regulation is 2mmV;
Described amplitude adjusting circuit 700 is connected with described supercircuit 600, and described supercircuit 600 is used for waveform described waveform generator 400 generations of stack, that the described amplitude adjusting circuit 700 of process is regulated on the bias voltage that described bias generation circuit 500 produces.
Embodiment three:
Referring to Fig. 3, embodiment three is that with the difference of embodiment two set up one drive circuit 800, described driving circuit 800 is connected with described supercircuit 600, this driving circuit 800 is used to increase the power of described supercircuit 600 output signals, to improve the power of the signal that signal generator produces;
The signal of described driving circuit 800 outputs is the signal that signal generator produces, and this signal is connected with subsequent device, in order to drive subsequent device (as former device to be tested) work;
When subsequent device needs bigger electric current to drive work, directly adopt the signal of described supercircuit 600 outputs possibly can't reach requirement, therefore, need this moment described driving circuit 800 to increase the electric current of the output signal of described supercircuit 600.
When signal generator of the present invention is applied to technical field of measurement and test, for guaranteeing the reliability of signal generator of the present invention itself, can adopt a measuring instrument 900 to detect the data of each some output, for example, adopt described measuring instrument 900 to detect frequency, the amplitude (as the fine dotted line haircut among Fig. 3) of the waveform of described amplitude adjusting circuit 700 outputs, adopt described measuring instrument 900 to detect the electric current (as the thick dashed line haircut among Fig. 3) of the signal of described driving circuit 800 outputs, all meet test request to guarantee each point.
Claims (9)
1. a signal generator is characterized in that, comprises host computer, storer, single-chip microcomputer, waveform generator, bias generation circuit and supercircuit;
Described storer is connected with described single-chip microcomputer is two-way, and this storer is used for preserving the condition that is provided with;
Described host computer is connected with described single-chip microcomputer, this host computer be used for the input condition is set, change is provided with condition and selection is provided with condition;
Described waveform generator is connected with described single-chip microcomputer, controls it by described single-chip microcomputer according to the condition of selecting that is provided with and produces waveform;
Described bias generation circuit is connected with described supercircuit, and described supercircuit is used for the described waveform bias voltage that described bias generation circuit produces that is added to, to form the waveform signal that needs.
2. signal generator as claimed in claim 1, it is characterized in that, also comprise amplitude adjusting circuit and D/A converter, described amplitude adjusting circuit is arranged between described waveform generator and the described supercircuit, described D/A converter links to each other with described amplitude adjusting circuit, the waveform that the output signal of the described D/A converter that described amplitude adjusting circuit will receive and described waveform generator produce is integrated, carry out amplitude according to certain input/output relation and regulate, and to regulate waveform behind the amplitude as the waveform on the described bias voltage that is added to.
3. signal generator as claimed in claim 2 is characterized in that the degree of regulation of described amplitude adjusting circuit is ± 2mV.
4. signal generator as claimed in claim 1 or 2 is characterized in that, also comprises driving circuit, and described driving circuit is connected with described supercircuit, and this driving circuit is used to increase the power of described supercircuit output signal.
5. signal generator as claimed in claim 4 is characterized in that, the described various parameters that the described waveform generator of conditional definition is set.
6. signal generator as claimed in claim 4 is characterized in that, described waveform generator produces square wave, triangular wave, sine wave or cosine wave (CW).
7. signal generator as claimed in claim 4 is characterized in that, the frequency-tuning range of the waveform that described waveform generator produces is 1Hz～10MHz, and degree of regulation is in ± 1KHz.
8. signal generator as claimed in claim 4 is characterized in that, the waveform that described waveform generator produces is reference point with 0V, and amplitude is ± 1V.
9. signal generator as claimed in claim 4 is characterized in that, described bias generation circuit and described supercircuit realize waveform is superimposed upon-18V～+ voltage of 18V on.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105433453A CN102087302A (en) | 2010-11-12 | 2010-11-12 | Signal generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105433453A CN102087302A (en) | 2010-11-12 | 2010-11-12 | Signal generator |
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| CN2010105433453A Pending CN102087302A (en) | 2010-11-12 | 2010-11-12 | Signal generator |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102404669A (en) * | 2011-11-10 | 2012-04-04 | 赵跃庆 | Audio frequency detection circuit and audio frequency detection method |
| CN102579222A (en) * | 2012-02-24 | 2012-07-18 | 江苏苏云医疗器材有限公司 | Portable biological resonance stimulation device |
| CN104678968A (en) * | 2015-02-10 | 2015-06-03 | 中国科学院西安光学精密机械研究所 | Firefly luminous simulator |
| CN108051623A (en) * | 2017-12-18 | 2018-05-18 | 徐州亚都环境科技有限公司 | A kind of signal generator |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102404669A (en) * | 2011-11-10 | 2012-04-04 | 赵跃庆 | Audio frequency detection circuit and audio frequency detection method |
| CN102579222A (en) * | 2012-02-24 | 2012-07-18 | 江苏苏云医疗器材有限公司 | Portable biological resonance stimulation device |
| CN104678968A (en) * | 2015-02-10 | 2015-06-03 | 中国科学院西安光学精密机械研究所 | Firefly luminous simulator |
| CN108051623A (en) * | 2017-12-18 | 2018-05-18 | 徐州亚都环境科技有限公司 | A kind of signal generator |
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Application publication date: 20110608 |