CN204304946U - A kind of low distortion oscilator system - Google Patents
A kind of low distortion oscilator system Download PDFInfo
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- CN204304946U CN204304946U CN201420694766.XU CN201420694766U CN204304946U CN 204304946 U CN204304946 U CN 204304946U CN 201420694766 U CN201420694766 U CN 201420694766U CN 204304946 U CN204304946 U CN 204304946U
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Abstract
The utility model discloses a kind of low distortion oscilator system, it is characterized in that: by signal amplification circuit, the positive-feedback circuit be connected with signal amplification circuit, the frequency selection circuit be connected with positive-feedback circuit, and the buffer circuit be connected with frequency selection circuit forms, described buffer circuit is by transformer T, dual-gate field-effect pipe Q2, positive pole is connected with a grid of dual-gate field-effect pipe Q2, the electric capacity C3 of minus earth, the resistance R10 be in parallel with electric capacity C3, one end is connected with the positive pole of electric capacity C3, the resistance R11 that the other end is connected with the Same Name of Ends on the former limit of transformer T after resistance R12, one end is connected with the b grid of dual-gate field-effect pipe Q2, the resistance R8 that the other end is connected with the source electrode of dual-gate field-effect pipe Q2 after electric capacity C2, one end is connected with the source electrode of dual-gate field-effect pipe Q2, the resistance R9 that the other end is connected with the tie point of electric capacity C2 with resistance R8 forms, the utility model load effect in effective anti-locking system and the frequency drift that produces because load change can show picture, thus realizes the low distortion of oscillating circuit.
Description
Technical field
The utility model relates to a kind of electronic component, specifically refers to a kind of low distortion oscilator system.
Background technology
Along with the development of electronic technology, oscillator is more and more extensive as producing the electronic component application repeating electric signal (normally sinusoidal wave or square wave).Its kind is a lot, can be divided into self-excited oscillator, independent drive oscillator by vibratory stimulation mode; Resistance-capacitance oscillator, LC oscillator, crystal oscillator, fork generator etc. can be divided into by circuit structure; The oscillators such as sine wave, square wave, sawtooth waveforms can be divided into by output waveform.Be widely used in the aspects such as electronics industry, medical treatment, scientific research at present.
But the easy distortion of current oscillator signal, have a strong impact on the judgement of people to signal.
Utility model content
The purpose of this utility model is to solve the current easy distortion of oscillator signal, has a strong impact on the defect of people to signal determining, provides a kind of low distortion oscilator system.
The purpose of this utility model is by following technical proposals reality: a kind of low distortion oscilator system, by signal amplification circuit, the positive-feedback circuit be connected with signal amplification circuit, the frequency selection circuit be connected with positive-feedback circuit, and the buffer circuit be connected with frequency selection circuit forms, described buffer circuit is by transformer T, dual-gate field-effect pipe Q2, positive pole is connected with a grid of dual-gate field-effect pipe Q2, the electric capacity C3 of minus earth, the resistance R10 be in parallel with electric capacity C3, one end is connected with the positive pole of electric capacity C3, the other end be connected with the Same Name of Ends on the former limit of transformer T after resistance R12 resistance R11, one end is connected with the b grid of dual-gate field-effect pipe Q2, the resistance R8 that the other end is connected with the source electrode of dual-gate field-effect pipe Q2 after electric capacity C2, one end is connected with the source electrode of dual-gate field-effect pipe Q2, the resistance R9 that the other end is connected with the tie point of electric capacity C2 with resistance R8 forms, the b grid of described dual-gate field-effect pipe Q2 is also connected with frequency selection circuit, its drain electrode is connected with transformer T former limit non-same polarity, transformer T secondary Same Name of Ends ground connection, the tie point ground connection of resistance R8 and electric capacity C2.
Further, described signal amplification circuit is by amplifier P1, the resistance R2 that one end is connected with positive-feedback circuit, the other end is connected with the inverting input of amplifier P1 after resistance R1, one end is connected with the normal phase input end of amplifier P1, the resistance R3 of other end ground connection, and the resistance R4 be serially connected between the inverting input of amplifier P1 and output forms; The output of described amplifier P1 is connected with positive-feedback circuit.
Described positive-feedback circuit is by FET Q1, and resistance R5, resistance R6, diode D1 form; The drain electrode of FET Q1 is connected with the output of amplifier P1 after resistance R5, its source electrode is then connected with frequency selection circuit with resistance R2 simultaneously, grid ground connection after resistance R6, and the P pole of diode D1 is connected with the grid of FET Q1, its N pole is then connected with frequency selection circuit.
Described frequency selection circuit comprises amplifier P2, electric capacity C1, resistance R7; The output of amplifier P2 is connected with the b grid of dual-gate field-effect pipe Q2 with the N pole of diode D1 after resistance R7 simultaneously, its positive input end grounding, inverting input are connected with the source electrode of FET Q1, between the inverting input that electric capacity C1 is then serially connected in amplifier P2 and output.
The utility model compared with prior art has the following advantages and beneficial effect:
1, the utility model compared with prior art adds buffer circuit, and it load effect in effective anti-locking system and the frequency drift that produces because load change can show picture, thus realizes the low distortion of oscillating circuit.
2, the utility model structure is simple, and cost of manufacture is cheap.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
Detailed description of the invention
Below in conjunction with embodiment, the utility model is described in further detail, but embodiment of the present utility model is not limited to this.
Embodiment
As shown in Figure 1, low distortion oscilator system of the present utility model, by signal amplification circuit, the positive-feedback circuit be connected with signal amplification circuit, the frequency selection circuit be connected with positive-feedback circuit, and the buffer circuit be connected with frequency selection circuit forms.
Wherein, buffer circuit is emphasis of the present utility model, and it is by transformer T, and dual-gate field-effect pipe Q2, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, electric capacity C2, electric capacity C3 form.During connection, the positive pole of electric capacity C3 is connected with a grid of dual-gate field-effect pipe Q2, minus earth, resistance R10 and electric capacity C3 is in parallel, one end of resistance R11 is connected with the positive pole of electric capacity C3, the other end is connected with the Same Name of Ends on the former limit of transformer T after resistance R12, one end of resistance R8 is connected with the b grid of dual-gate field-effect pipe Q2, the other end is connected with the source electrode of dual-gate field-effect pipe Q2 after electric capacity C2, and one end of resistance R9 is connected with the source electrode of dual-gate field-effect pipe Q2, the other end is connected with the tie point of electric capacity C2 with resistance R8.Meanwhile, the b grid of dual-gate field-effect pipe Q2 is also connected with frequency selection circuit, its drain electrode is connected with transformer T former limit non-same polarity, transformer T secondary Same Name of Ends ground connection, the tie point ground connection of resistance R8 and electric capacity C2.Load effect in effective anti-locking system and the frequency drift that produces because load change can show picture by the effect of buffer circuit, thus realize the low distortion of oscillating circuit.
Be provided with signal amplification circuit in system, it can be amplified inputted signal, ensures that the signal exported maintains constant numerical value.It is by amplifier P1, the resistance R2 that one end is connected with positive-feedback circuit, the other end is connected with the inverting input of amplifier P1 after resistance R1, one end is connected with the normal phase input end of amplifier P1, the resistance R3 of other end ground connection, and the resistance R4 be serially connected between the inverting input of amplifier P1 and output forms; The output of described amplifier P1 is connected with positive-feedback circuit.
Positive-feedback circuit can make the phase place of the feedback signal of input identical, to ensure that system oscillation maintains.It is by FET Q1, resistance R5, resistance R6, and diode D1 forms.During connection, the drain electrode of FET Q1 is connected with the output of amplifier P1 after resistance R5, its source electrode is then connected with frequency selection circuit with resistance R2 simultaneously, grid ground connection after resistance R6, and the P pole of diode D1 is connected with the grid of FET Q1, its N pole is then connected with frequency selection circuit.
Frequency selection circuit then can screen frequency, and it allows specific frequency to pass through, and makes oscillatory system maintain the output of single-frequency.Frequency selection circuit comprises amplifier P2, electric capacity C1, resistance R7.During connection, the output of amplifier P2 is connected with the b grid of dual-gate field-effect pipe Q2 with the N pole of diode D1 after resistance R7 simultaneously, its positive input end grounding, inverting input are connected with the source electrode of FET Q1, between the inverting input that electric capacity C1 is then serially connected in amplifier P2 and output.
As mentioned above, just well the utility model can be realized.
Claims (4)
1. a low distortion oscilator system, is characterized in that: by signal amplification circuit, the positive-feedback circuit be connected with signal amplification circuit, the frequency selection circuit be connected with positive-feedback circuit, and the buffer circuit be connected with frequency selection circuit forms, described buffer circuit is by transformer T, dual-gate field-effect pipe Q2, positive pole is connected with a grid of dual-gate field-effect pipe Q2, the electric capacity C3 of minus earth, the resistance R10 be in parallel with electric capacity C3, one end is connected with the positive pole of electric capacity C3, the other end be connected with the Same Name of Ends on the former limit of transformer T after resistance R12 resistance R11, one end is connected with the b grid of dual-gate field-effect pipe Q2, the resistance R8 that the other end is connected with the source electrode of dual-gate field-effect pipe Q2 after electric capacity C2, one end is connected with the source electrode of dual-gate field-effect pipe Q2, the resistance R9 that the other end is connected with the tie point of electric capacity C2 with resistance R8 forms, the b grid of described dual-gate field-effect pipe Q2 is also connected with frequency selection circuit, its drain electrode is connected with transformer T former limit non-same polarity, transformer T secondary Same Name of Ends ground connection, the tie point ground connection of resistance R8 and electric capacity C2.
2. a kind of low distortion oscilator system according to claim 1, it is characterized in that: described signal amplification circuit is by amplifier P1, the resistance R2 that one end is connected with positive-feedback circuit, the other end is connected with the inverting input of amplifier P1 after resistance R1, one end is connected with the normal phase input end of amplifier P1, the resistance R3 of other end ground connection, and the resistance R4 be serially connected between the inverting input of amplifier P1 and output forms; The output of described amplifier P1 is connected with positive-feedback circuit.
3. a kind of low distortion oscilator system according to claim 2, is characterized in that: described positive-feedback circuit is by FET Q1, and resistance R5, resistance R6, diode D1 form; The drain electrode of FET Q1 is connected with the output of amplifier P1 after resistance R5, its source electrode is then connected with frequency selection circuit with resistance R2 simultaneously, grid ground connection after resistance R6, and the P pole of diode D1 is connected with the grid of FET Q1, its N pole is then connected with frequency selection circuit.
4. a kind of low distortion oscilator system according to claim 3, is characterized in that: described frequency selection circuit comprises amplifier P2, electric capacity C1, resistance R7; The output of amplifier P2 is connected with the b grid of dual-gate field-effect pipe Q2 with the N pole of diode D1 after resistance R7 simultaneously, its positive input end grounding, inverting input are connected with the source electrode of FET Q1, between the inverting input that electric capacity C1 is then serially connected in amplifier P2 and output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420694766.XU CN204304946U (en) | 2014-11-18 | 2014-11-18 | A kind of low distortion oscilator system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420694766.XU CN204304946U (en) | 2014-11-18 | 2014-11-18 | A kind of low distortion oscilator system |
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| CN204304946U true CN204304946U (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420694766.XU Expired - Fee Related CN204304946U (en) | 2014-11-18 | 2014-11-18 | A kind of low distortion oscilator system |
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| CN (1) | CN204304946U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112530249A (en) * | 2020-12-30 | 2021-03-19 | 山东建筑大学 | Sine wave oscillation experimental circuit composed of MOS (metal oxide semiconductor) tubes |
-
2014
- 2014-11-18 CN CN201420694766.XU patent/CN204304946U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112530249A (en) * | 2020-12-30 | 2021-03-19 | 山东建筑大学 | Sine wave oscillation experimental circuit composed of MOS (metal oxide semiconductor) tubes |
| CN112530249B (en) * | 2020-12-30 | 2021-10-29 | 山东建筑大学 | Sine wave oscillation experimental circuit composed of MOS (metal oxide semiconductor) tubes |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150429 Termination date: 20151118 |
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| EXPY | Termination of patent right or utility model |