CN204119168U - A kind of simple and easy waveform generator - Google Patents
A kind of simple and easy waveform generator Download PDFInfo
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- CN204119168U CN204119168U CN201420590569.3U CN201420590569U CN204119168U CN 204119168 U CN204119168 U CN 204119168U CN 201420590569 U CN201420590569 U CN 201420590569U CN 204119168 U CN204119168 U CN 204119168U
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Abstract
The utility model discloses a kind of simple and easy waveform generator, comprise start-oscillation circuit, frequency selection circuit, single supply four road operational amplifier, fixed amplitude circuit, signal extracting circuit and signal amplification circuit, this start-oscillation circuit and frequency selection circuit are connected with the pin of single supply four road operational amplifier respectively, the output of this single supply four road operational amplifier is connected with fixed amplitude circuit, signal extracting circuit successively, and the output of this signal extracting circuit is connected with signal amplification circuit.Simple and easy waveform generator of the present utility model adopts LM324 integrated transporting discharging chip, the components and parts such as external resistor, electric capacity, form simple and easy waveform generator, and the efficient height of waveform generatar, volume are little, lightweight, stable output, can the electronic signals such as sinusoidal wave be produced, can as the signal generating module circuit of other electronics.
Description
Technical field
The utility model relates to electroacoustic or electron trade, especially a kind of simple and easy waveform generator.
Background technology
Bad during existing product functional test fashion, be difficult to interception online and detect, cause reducing customer satisfaction and complaint, quality cannot ensure, becomes current techniques bottleneck.In electroacoustic or electron trade, waveform signal often will be used to produce circuit, be usually used in producing various electronic signal, complete communication between electronic system and automatically to measure and automatically in the system such as control, and existing integrated form waveform generator complex structure, cost are high, electroacoustic or electronics manufacturer are unwilling to spend too high cost to go to buy it, cause its product to carry out functional test.
Utility model content
For solving the problems of the technologies described above, the purpose of this utility model is to provide that a kind of efficiency is high, the low simple and easy waveform generator having again stability concurrently of cost.
The technical solution adopted in the utility model is:
A kind of simple and easy waveform generator, comprise start-oscillation circuit, frequency selection circuit, single supply four road operational amplifier, fixed amplitude circuit, signal extracting circuit and signal amplification circuit, this start-oscillation circuit and frequency selection circuit are connected with the pin of single supply four road operational amplifier respectively, the output of this single supply four road operational amplifier is connected with fixed amplitude circuit, signal extracting circuit successively, and the output of this signal extracting circuit is connected with signal amplification circuit.
Further, the common point between the output of described signal extracting circuit and signal amplification circuit is connected with potentiometer.
The 12 resistance R12 and the 13 resistance R13 is in series with between the output of described signal extracting circuit and signal amplification circuit; Described potentiometer is slide rheostat RP1, RP1 one end ground connection, and the common point between the other end with the 12 resistance R12 and the 13 resistance R13 is connected.
Wherein, described single supply four road operational amplifier is LM324 chip.
Described signal amplification circuit comprises a binary channels monolithic power amplification circuit TDA2822 and the 4th electric capacity C4 be connected with TDA2822, the 5th electric capacity C5, the 14 resistance R14 and the 15 resistance R15.
Described start-oscillation circuit comprises the 5th resistance R5 and the 3rd electric capacity C3 that connect with single supply four road operational amplifier.
Described frequency selection circuit comprises and to be connected with single supply four road operational amplifier and the second resistance R2 of of parallel connection and the second electric capacity C2.
Described fixed amplitude circuit is IN4148 diode circuit, and IN4148 comprises the diode that four form series loop, and this IN4148 diode circuit has the input/output terminal that three connect single supply four road operational amplifier, start-oscillation circuit, signal extracting circuit respectively.
To be the 11 electric capacity C11, C11 one end be connected with the output of single supply four road operational amplifier and fixed amplitude circuit described signal extracting circuit, and the C11 other end is connected with the input of signal amplification circuit.
The beneficial effects of the utility model:
Simple and easy waveform generator of the present utility model adopts LM324 integrated transporting discharging chip, the components and parts such as external resistor, electric capacity, form simple and easy waveform generator, and the efficient height of waveform generatar, volume are little, lightweight, stable output, can the electronic signals such as sinusoidal wave be produced, can as the signal generating module circuit of other electronics.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further.
Fig. 1 is the circuit diagram of the simple and easy waveform generator of the utility model;
Fig. 2 is the functional pin figure of LM324 chip.
Embodiment
As shown in Figure 1, for the simple and easy waveform generator of one of the present utility model, comprise start-oscillation circuit 10, frequency selection circuit 20, single supply four road operational amplifier, fixed amplitude circuit, signal extracting circuit and signal amplification circuit, this start-oscillation circuit 10 and frequency selection circuit 20 are connected with the pin of single supply four road operational amplifier respectively, the output of this single supply four road operational amplifier is connected with fixed amplitude circuit, signal extracting circuit successively, and the output of this signal extracting circuit is connected with signal amplification circuit.
Its operation principle is, start-oscillation circuit 10 connects moment at power supply, source current fluctuates, containing the noise that frequency range is wider in current fluctuation, a frequency wherein must be had to be that the signal equaling frequency of oscillation is obtained by frequency selection circuit 20, then carry out circuit amplification and positive feedback by single supply four road operational amplifier, signal amplitude is increasing, form oscillator signal, complete self-oscillating; Sine wave signal after starting of oscillation stablizes the amplitude of sine wave signal by fixed amplitude circuit, exports stable sine wave signal, and by signal extracting circuit output AC signal to signal amplification circuit, signal is amplified then output waveform signals by signal amplification circuit again.
As the optimization of such scheme, the common point of the utility model between the output and signal amplification circuit of described signal extracting circuit is connected with potentiometer, is in series with the 12 resistance R12 and the 13 resistance R13 between the output of described signal extracting circuit C11 and signal amplification circuit; Described potentiometer is slide rheostat RP1, RP1 one end ground connection, and the common point between the other end with the 12 resistance R12 and the 13 resistance R13 is connected.
Shown in composition graphs 2, the road of single supply four described in the present embodiment operational amplifier is LM324 chip, and LM324 chip is four road operational amplifiers of low cost, has real Differential Input.In single supply application, they have several obvious advantage compared with standard operational amplifier type.This No. four amplifier can work in and be low to moderate 3.0 V or the supply voltage up to 32 V, and quiescent current is about 1/5th (each amplifiers) of MC1741, and in this enforcement, LM324 uses single power supply DC9V, all the other DC4.5V that power.
As Fig. 1, described signal amplification circuit comprises a binary channels monolithic power amplification circuit TDA2822 and the 4th electric capacity C4 be connected with TDA2822, the 5th electric capacity C5, the 14 resistance R14 and the 15 resistance R15, a wherein output of TDA2822 connects the 7th electric capacity C7, the 16 resistance R16 and the 6th electric capacity C6, the common point of the 7th electric capacity C7 and the 16 resistance R16 is the output L of the utility model waveform generator, and the output R of waveform generator is another output of TDA2822.
Wherein, described start-oscillation circuit 10 comprises the 5th resistance R5 and the 3rd electric capacity C3 that connect with single supply four road operational amplifier LM324, sinusoidal wave occurrence condition:
Starting condition for oscillation: | AF| >=1;
Amplitude balance condition: | AF|=1;
Phase equilibrium: ∮=∮ A+ ∮ F=± 2n Л (n=0,1,2 ...);
Described frequency selection circuit 20 comprises and to be connected with single supply four road operational amplifier LM324 and the second resistance R2 of of parallel connection and the second electric capacity C2, second resistance R2 and the second electric capacity C2 forms frequency-selective network 1KHz(the technical program designing requirement sine wave output signal, and frequency is 1KHz).Wherein, frequency f 0=1/2 Л RC, C electric capacity more small frequency is higher.
Concrete, described fixed amplitude circuit is IN4148 diode circuit, IN4148 comprises the diode that four form series loop, and this IN4148 diode circuit has the input/output terminal that three connect single supply four road operational amplifier, start-oscillation circuit 10, signal extracting circuit respectively.
The foregoing is only preferred embodiments of the present utility model, the utility model is not limited to above-mentioned execution mode, as long as the technical scheme realizing the utility model object with basic same approach all belongs within protection range of the present utility model.
Claims (9)
1. a simple and easy waveform generator, it is characterized in that: comprise start-oscillation circuit (10), frequency selection circuit (20), single supply four road operational amplifier, fixed amplitude circuit, signal extracting circuit and signal amplification circuit, this start-oscillation circuit (10) and frequency selection circuit (20) are connected with the pin of single supply four road operational amplifier respectively, the output of this single supply four road operational amplifier is connected with fixed amplitude circuit, signal extracting circuit successively, and the output of this signal extracting circuit is connected with signal amplification circuit.
2. the simple and easy waveform generator of one according to claim 1, is characterized in that: the common point between the output of described signal extracting circuit and signal amplification circuit is connected with potentiometer.
3. the simple and easy waveform generator of one according to claim 2, is characterized in that: be in series with the 12 resistance R12 and the 13 resistance R13 between the output of described signal extracting circuit and signal amplification circuit; Described potentiometer is slide rheostat RP1, RP1 one end ground connection, and the common point between the other end with the 12 resistance R12 and the 13 resistance R13 is connected.
4. the simple and easy waveform generator of one according to claim 1, is characterized in that: described single supply four road operational amplifier is LM324 chip.
5. the simple and easy waveform generator of one according to claim 1, is characterized in that: described signal amplification circuit comprises a binary channels monolithic power amplification circuit TDA2822 and the 4th electric capacity C4 be connected with TDA2822, the 5th electric capacity C5, the 14 resistance R14 and the 15 resistance R15.
6. the simple and easy waveform generator of one according to claim 1, is characterized in that: described start-oscillation circuit (10) comprises the 5th resistance R5 and the 3rd electric capacity C3 that connect with single supply four road operational amplifier.
7. the simple and easy waveform generator of one according to claim 1, is characterized in that: described frequency selection circuit (20) comprises and to be connected with single supply four road operational amplifier and the second resistance R2 of of parallel connection and the second electric capacity C2.
8. the simple and easy waveform generator of one according to claim 1, it is characterized in that: described fixed amplitude circuit is IN4148 diode circuit, IN4148 comprises the diode that four form series loop, and this IN4148 diode circuit has the input/output terminal that three connect single supply four road operational amplifier, start-oscillation circuit (10), signal extracting circuit respectively.
9. the simple and easy waveform generator of one according to claim 1, it is characterized in that: described signal extracting circuit is the 11 electric capacity C11, output and the fixed amplitude circuit of C11 one end and single supply four road operational amplifier are connected, and the C11 other end is connected with the input of signal amplification circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420590569.3U CN204119168U (en) | 2014-10-13 | 2014-10-13 | A kind of simple and easy waveform generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420590569.3U CN204119168U (en) | 2014-10-13 | 2014-10-13 | A kind of simple and easy waveform generator |
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| Publication Number | Publication Date |
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| CN204119168U true CN204119168U (en) | 2015-01-21 |
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| CN201420590569.3U Active CN204119168U (en) | 2014-10-13 | 2014-10-13 | A kind of simple and easy waveform generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300912A (en) * | 2014-10-13 | 2015-01-21 | 中山市天键电声有限公司 | Simple waveform generator |
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2014
- 2014-10-13 CN CN201420590569.3U patent/CN204119168U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300912A (en) * | 2014-10-13 | 2015-01-21 | 中山市天键电声有限公司 | Simple waveform generator |
| CN104300912B (en) * | 2014-10-13 | 2017-06-20 | 中山市天键电声有限公司 | A kind of simple waveform generator |
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