CN204304930U - Based on the low distortion oscillatory system of monolithic crystalline substance control conversion - Google Patents
Based on the low distortion oscillatory system of monolithic crystalline substance control conversion Download PDFInfo
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- CN204304930U CN204304930U CN201420697754.2U CN201420697754U CN204304930U CN 204304930 U CN204304930 U CN 204304930U CN 201420697754 U CN201420697754 U CN 201420697754U CN 204304930 U CN204304930 U CN 204304930U
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Abstract
The utility model discloses the low distortion oscillatory system based on monolithic crystalline substance control conversion, primarily of 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 to be connected with frequency selection circuit forms, and it is characterized in that: be also provided with signal conversion circuit at the input of signal amplification circuit; Described signal conversion circuit is by conversion chip K, transformer T1, be serially connected in the electric capacity C1 between transformer T1 secondary Same Name of Ends and non-same polarity, the electric capacity C2 be in parallel with electric capacity C1, the triode VT1 that colelctor electrode is connected with the OSC1 pin of conversion chip K, emitter stage is connected with the OSC2 pin of conversion chip K after resistance R1, base stage is then connected with the OSC2 pin of conversion chip K after fundamental quartz crystal X, the electric capacity C3 that one end is connected with the base stage of triode VT1, the other end is then connected with the VCC pin of conversion chip K forms; The utility model can make oscillatory system be applicable to very wide frequency range, thus expands the application scenario of oscillatory system.
Description
Technical field
The utility model relates to a kind of system, specifically refers to the low distortion oscillatory system based on monolithic crystalline substance control conversion.
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 current oscilator system the frequency range that is suitable for less, this just makes oscillatory system range of application have significant limitation.
Utility model content
The purpose of this utility model be to solve current oscillatory system the less defect of the frequency range that is suitable for, a kind of low distortion oscillatory system converted based on the control of monolithic crystalline substance is provided.
The purpose of this utility model is by following technical proposals reality: based on the low distortion oscillatory system of monolithic crystalline substance control conversion, primarily of 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.Also signal conversion circuit is provided with at the input of signal amplification circuit; Described signal conversion circuit is by conversion chip K, transformer T1, be serially connected in the electric capacity C1 between transformer T1 secondary Same Name of Ends and non-same polarity, the electric capacity C2 be in parallel with electric capacity C1, the triode VT1 that colelctor electrode is connected with the OSC1 pin of conversion chip K, emitter stage is connected with the OSC2 pin of conversion chip K after resistance R1, base stage is then connected with the OSC2 pin of conversion chip K after fundamental quartz crystal X, the electric capacity C3 that one end is connected with the base stage of triode VT1, the other end is then connected with the VCC pin of conversion chip K forms; The base stage of described triode VT1 is connected with external power source, and the IN1 pin of conversion chip K is connected with the non-same polarity of transformer T1 secondary, its IN2 pin is then connected with the Same Name of Ends of transformer T1 secondary, GND pin is connected with the non-same polarity on the former limit of transformer T1, VCC pin is connected with the base stage of triode VT1, OUT2 pin is all connected with signal amplification circuit with OUT1 pin.
Further, described signal amplification circuit is by amplifier P1, the electric capacity C4 that positive pole is connected with the OUT2 pin of conversion chip K, negative pole is connected with positive-feedback circuit and frequency selection circuit after resistance R3, the resistance R2 that one end is connected with the inverting input of amplifier P1, the other end is connected with the negative pole of electric capacity C4, one end is connected with the normal phase input end of amplifier P1, the resistance R4 of other end ground connection, and the resistance R5 be serially connected between the inverting input of amplifier P1 and output forms; The inverting input of described amplifier P1 is connected with the OUT1 pin of conversion chip K, and its output is then connected with positive-feedback circuit.
Described positive-feedback circuit by FET Q1, resistance R6, resistance R7, and diode D1 forms; The drain electrode of FET Q1 is connected with the output of amplifier P1 after resistance R6, its source electrode is then connected with frequency selection circuit with resistance R3 simultaneously, its grid ground connection after resistance R7, 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 C5, resistance R8; The output of amplifier P2 after resistance R8 simultaneously with the N pole of diode D1 and buffer circuit is connected, its positive input end grounding, inverting input are connected with the source electrode of FET Q1, between the inverting input that electric capacity C5 is then serially connected in amplifier P2 and output.
Described buffer circuit is by transformer T2, dual-gate field-effect pipe Q2, positive pole is connected with a grid of dual-gate field-effect pipe Q2, the electric capacity C7 of minus earth, the resistance R11 be in parallel with electric capacity C7, one end is connected with the positive pole of electric capacity C7, the resistance R12 that the other end is connected with the Same Name of Ends on the former limit of transformer T2 after resistance R13, one end is connected with the b grid of dual-gate field-effect pipe Q2, the resistance R9 that the other end is connected with the source electrode of dual-gate field-effect pipe Q2 after electric capacity C6, and 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 C6 with resistance R9 forms.The N pole of the b grid of described dual-gate field-effect pipe Q2 also diode D1 is connected, its drain electrode is connected with the non-same polarity on the former limit of transformer T2, the Same Name of Ends ground connection of transformer T2 secondary, the tie point ground connection of resistance R9 and electric capacity C6.
The utility model compared with prior art has the following advantages and beneficial effect:
1, the utility model compared with prior art adds signal conversion circuit, and it can make oscillatory system be applicable to very wide frequency range, thus expands the application scenario of oscillatory system.
2, conversion chip K of the present utility model is with low cost, and has good signal to noise ratio and third order intermodulation index.
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 oscillatory system based on monolithic crystalline substance control conversion of the present utility model, primarily of 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.In order to make oscillatory system be applicable to very wide frequency range, expanding the application scenario of oscillatory system, being therefore also provided with signal conversion circuit at the input of signal amplification circuit.
Wherein, signal conversion circuit is by conversion chip K, and transformer T1, electric capacity C1, electric capacity C2, electric capacity C3, resistance R1, triode VT1, fundamental quartz crystal X form.During connection, electric capacity C1 is serially connected between transformer T1 secondary Same Name of Ends and non-same polarity, electric capacity C2 is then in parallel with electric capacity C1, the colelctor electrode of triode VT1 is connected with the OSC1 pin of conversion chip K, emitter stage is connected with the OSC2 pin of conversion chip K after resistance R1, base stage is then connected with the OSC2 pin of conversion chip K after fundamental quartz crystal X, and one end of electric capacity C3 is connected with the base stage of triode VT1, the other end is then connected with the VCC pin of conversion chip K.Simultaneously, the base stage of triode VT1 is connected with external power source, and the IN1 pin of conversion chip K is connected with the non-same polarity of transformer T1 secondary, its IN2 pin is then connected with the Same Name of Ends of transformer T1 secondary, GND pin is connected with the non-same polarity on the former limit of transformer T1, VCC pin is connected with the base stage of triode VT1, OUT2 pin is all connected with signal amplification circuit with OUT1 pin.In order to better realize the utility model, described conversion chip K is preferably NE602, and it is easy to use and have good signal to noise ratio and third order intermodulation index.
Be provided with signal amplification circuit in system, it can be amplified inputted signal, ensures that the signal exported maintains constant numerical value.This signal amplification circuit is by amplifier P1, the electric capacity C4 that positive pole is connected with the OUT2 pin of conversion chip K, negative pole is connected with positive-feedback circuit and frequency selection circuit after resistance R3, the resistance R2 that one end is connected with the inverting input of amplifier P1, the other end is connected with the negative pole of electric capacity C4, one end is connected with the normal phase input end of amplifier P1, the resistance R4 of other end ground connection, and the resistance R5 be serially connected between the inverting input of amplifier P1 and output forms; The inverting input of described amplifier P1 is connected with the OUT1 pin of conversion chip K, and its output is then 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 R6, resistance R7, and diode D1 forms.During connection, the drain electrode of FET Q1 is connected with the output of amplifier P1 after resistance R6, its source electrode is then connected with frequency selection circuit with resistance R3 simultaneously, its grid ground connection after resistance R7, 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.Described frequency selection circuit comprises amplifier P2, electric capacity C5, resistance R8.During connection, the output of amplifier P2 after resistance R8 simultaneously with the N pole of diode D1 and buffer circuit is connected, its positive input end grounding, inverting input are connected with the source electrode of FET Q1, between the inverting input that electric capacity C5 is then serially connected in amplifier P2 and output.
Meanwhile, buffer circuit is by transformer T2, and dual-gate field-effect pipe Q2, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, electric capacity C6, electric capacity C7 form.The positive pole of electric capacity C7 is connected with a grid of dual-gate field-effect pipe Q2, minus earth, resistance R11 and electric capacity C7 is in parallel, one end of resistance R12 is connected with the positive pole of electric capacity C7, the other end is connected with the Same Name of Ends on the former limit of transformer T2 after resistance R13, one end of resistance R9 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 C6, 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 C6 with resistance R9.Simultaneously, the N pole of the b grid of described dual-gate field-effect pipe Q2 also diode D1 is connected, its drain electrode is connected with the non-same polarity on the former limit of transformer T2, the Same Name of Ends ground connection of transformer T2 secondary, its secondary non-same polarity then as the output of circuit, the tie point ground connection of resistance R9 and electric capacity C6.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.
As mentioned above, just well the utility model can be realized.
Claims (5)
1. based on the low distortion oscillatory system of monolithic crystalline substance control conversion, primarily of 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 to be connected with frequency selection circuit forms, and it is characterized in that: be also provided with signal conversion circuit at the input of signal amplification circuit; Described signal conversion circuit is by conversion chip K, transformer T1, be serially connected in the electric capacity C1 between transformer T1 secondary Same Name of Ends and non-same polarity, the electric capacity C2 be in parallel with electric capacity C1, the triode VT1 that colelctor electrode is connected with the OSC1 pin of conversion chip K, emitter stage is connected with the OSC2 pin of conversion chip K after resistance R1, base stage is then connected with the OSC2 pin of conversion chip K after fundamental quartz crystal X, the electric capacity C3 that one end is connected with the base stage of triode VT1, the other end is then connected with the VCC pin of conversion chip K forms; The base stage of described triode VT1 is connected with external power source, and the IN1 pin of conversion chip K is connected with the non-same polarity of transformer T1 secondary, its IN2 pin is then connected with the Same Name of Ends of transformer T1 secondary, GND pin is connected with the non-same polarity on the former limit of transformer T1, VCC pin is connected with the base stage of triode VT1, OUT2 pin is all connected with signal amplification circuit with OUT1 pin.
2. the low distortion oscillatory system based on monolithic crystalline substance control conversion according to claim 1, it is characterized in that: described signal amplification circuit is by amplifier P1, positive pole is connected with the OUT2 pin of conversion chip K, the electric capacity C4 that negative pole is connected with positive-feedback circuit and frequency selection circuit after resistance R3, one end is connected with the inverting input of amplifier P1, the resistance R2 that the other end is connected with the negative pole of electric capacity C4, one end is connected with the normal phase input end of amplifier P1, the resistance R4 of other end ground connection, and the resistance R5 be serially connected between the inverting input of amplifier P1 and output forms, the inverting input of described amplifier P1 is connected with the OUT1 pin of conversion chip K, and its output is then connected with positive-feedback circuit.
3. the low distortion oscillatory system based on monolithic crystalline substance control conversion according to claim 2, is characterized in that: described positive-feedback circuit by FET Q1, resistance R6, resistance R7, and diode D1 forms; The drain electrode of FET Q1 is connected with the output of amplifier P1 after resistance R6, its source electrode is then connected with frequency selection circuit with resistance R3 simultaneously, its grid ground connection after resistance R7, 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. the low distortion oscillatory system based on monolithic crystalline substance control conversion according to claim 3, is characterized in that: described frequency selection circuit comprises amplifier P2, electric capacity C5, resistance R8; The output of amplifier P2 after resistance R8 simultaneously with the N pole of diode D1 and buffer circuit is connected, its positive input end grounding, inverting input are connected with the source electrode of FET Q1, between the inverting input that electric capacity C5 is then serially connected in amplifier P2 and output.
5. the low distortion oscillatory system based on monolithic crystalline substance control conversion according to claim 4, it is characterized in that: described buffer circuit is by transformer T2, dual-gate field-effect pipe Q2, positive pole is connected with a grid of dual-gate field-effect pipe Q2, the electric capacity C7 of minus earth, the resistance R11 be in parallel with electric capacity C7, one end is connected with the positive pole of electric capacity C7, the resistance R12 that the other end is connected with the Same Name of Ends on the former limit of transformer T2 after resistance R13, one end is connected with the b grid of dual-gate field-effect pipe Q2, the resistance R9 that the other end is connected with the source electrode of dual-gate field-effect pipe Q2 after electric capacity C6, and 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 C6 with resistance R9 forms, the N pole of the b grid of described dual-gate field-effect pipe Q2 also diode D1 is connected, its drain electrode is connected with the non-same polarity on the former limit of transformer T2, the Same Name of Ends ground connection of transformer T2 secondary, the tie point ground connection of resistance R9 and electric capacity C6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420697754.2U CN204304930U (en) | 2014-11-18 | 2014-11-18 | Based on the low distortion oscillatory system of monolithic crystalline substance control conversion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420697754.2U CN204304930U (en) | 2014-11-18 | 2014-11-18 | Based on the low distortion oscillatory system of monolithic crystalline substance control conversion |
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| CN204304930U true CN204304930U (en) | 2015-04-29 |
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| CN201420697754.2U Expired - Fee Related CN204304930U (en) | 2014-11-18 | 2014-11-18 | Based on the low distortion oscillatory system of monolithic crystalline substance control conversion |
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| 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 |