CN104506156A - Low distortion factor oscillator system - Google Patents
Low distortion factor oscillator system Download PDFInfo
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- CN104506156A CN104506156A CN201410658843.0A CN201410658843A CN104506156A CN 104506156 A CN104506156 A CN 104506156A CN 201410658843 A CN201410658843 A CN 201410658843A CN 104506156 A CN104506156 A CN 104506156A
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Abstract
The invention discloses a low distortion factor oscillator system. The low distortion factor oscillator system is characterized by comprising a signal amplification circuit, a positive feedback circuit connected with the signal amplification circuit, a frequency selecting circuit connected with the positive feedback circuit, and a buffer circuit connected with the frequency selecting circuit, wherein the buffer circuit comprises a transformer T, a bigrid field-effect tube Q2, a capacitor C3, a resistor R10, a resistor R11, a resistor R8, and a resistor R9, wherein the anode of the capacitor C3 is connected with the a grid of the bigrid field-effect tube Q2, the cathode of the capacitor C3 is grounded, the resistor R10 and the capacitor C3 are in parallel connection, one end of the resistor R11 is connected with the anode of the capacitor C3, the other end of the resistor R11 is connected with a resistor R12 and then is connected with an end of the same name of the primary side of the transformer T, one end of the resistor R8 is connected with the b grid of the bigrid field-effect tube Q2, the other end of the resistor R8 is connected with the capacitor C2 and then is connected with the source electrode of the bigrid field-effect tube Q2, one end of the resistor R9 is connected with the source electrode of the bigrid field-effect tube Q2, and the other end of the resistor R9 is connected with connecting points of the resistor R8 and the capacitor C2. The low distortion factor oscillator system can effectively prevent load effect in the system and frequency shift caused by load change, thereby realizing low distortion factor of an oscillating circuit.
Description
Technical field
The present invention relates to a kind of electronic component, specifically refer 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, driven 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.
Summary of the invention
The object of the invention is to solve the current easy distortion of oscillator signal, have a strong impact on the defect of people to signal determining, a kind of low distortion oscilator system is provided.
Object of the present invention is by following technical proposals reality: a kind of low distortion oscilator system, by signal amplification circuit, the regenerative circuit be connected with signal amplification circuit, the frequency selection circuit be connected with regenerative 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 regenerative 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 regenerative circuit.
Described regenerative circuit is by field effect transistor Q1, and resistance R5, resistance R6, diode D1 form; The drain electrode of field effect transistor 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 field effect transistor 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 field effect transistor Q1, between the inverting input that electric capacity C1 is then serially connected in amplifier P2 and output.
The present invention compared with prior art has the following advantages and beneficial effect:
1, the present invention compared with prior art adds buffer circuit, and it can load effect in effective anti-locking system and the existing picture of frequency drift that produces because of load variations, thus realizes the low distortion of oscillating circuit.
2, structure of the present invention is simple, and cost of manufacture is cheap.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1, low distortion oscilator system of the present invention, by signal amplification circuit, the regenerative circuit be connected with signal amplification circuit, the frequency selection circuit be connected with regenerative circuit, and the buffer circuit be connected with frequency selection circuit forms.
Wherein, buffer circuit is emphasis of the present invention, 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.Can load effect in effective anti-locking system and the existing picture of frequency drift that produces because of load variations 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 regenerative 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 regenerative circuit.
Regenerative circuit can make the phase place of the feedback signal of input identical, to ensure that system oscillation maintains.It is by field effect transistor Q1, resistance R5, resistance R6, and diode D1 forms.During connection, the drain electrode of field effect transistor 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 field effect transistor 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 field effect transistor Q1, between the inverting input that electric capacity C1 is then serially connected in amplifier P2 and output.
As mentioned above, just well the present invention can be realized.
Claims (4)
1. a low distortion oscilator system, is characterized in that: by signal amplification circuit, the regenerative circuit be connected with signal amplification circuit, the frequency selection circuit be connected with regenerative 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 regenerative 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 regenerative circuit.
3. a kind of low distortion oscilator system according to claim 2, is characterized in that: described regenerative circuit is by field effect transistor Q1, and resistance R5, resistance R6, diode D1 form; The drain electrode of field effect transistor 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 field effect transistor 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 field effect transistor Q1, between the inverting input that electric capacity C1 is then serially connected in amplifier P2 and output.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410658843.0A CN104506156A (en) | 2014-11-18 | 2014-11-18 | Low distortion factor oscillator system |
| CN201510310119.3A CN104935251A (en) | 2014-11-18 | 2015-06-08 | Low-distortion voltage-stabilizing dual oscillator system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410658843.0A CN104506156A (en) | 2014-11-18 | 2014-11-18 | Low distortion factor oscillator system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104506156A true CN104506156A (en) | 2015-04-08 |
Family
ID=52947882
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410658843.0A Pending CN104506156A (en) | 2014-11-18 | 2014-11-18 | Low distortion factor oscillator system |
| CN201510310119.3A Withdrawn CN104935251A (en) | 2014-11-18 | 2015-06-08 | Low-distortion voltage-stabilizing dual oscillator system |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510310119.3A Withdrawn CN104935251A (en) | 2014-11-18 | 2015-06-08 | Low-distortion voltage-stabilizing dual oscillator system |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN104506156A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105201803A (en) * | 2015-09-02 | 2015-12-30 | 宁波摩米创新工场电子科技有限公司 | Automatic constant temperature control system based on frequency stabilization circuit and applied to a circulating water pump |
-
2014
- 2014-11-18 CN CN201410658843.0A patent/CN104506156A/en active Pending
-
2015
- 2015-06-08 CN CN201510310119.3A patent/CN104935251A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105201803A (en) * | 2015-09-02 | 2015-12-30 | 宁波摩米创新工场电子科技有限公司 | Automatic constant temperature control system based on frequency stabilization circuit and applied to a circulating water pump |
| CN105201803B (en) * | 2015-09-02 | 2017-03-29 | 宁波摩米创新工场电子科技有限公司 | Water circulating pump constant-temperature automatic control system based on frequency stabilization oscillating circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104935251A (en) | 2015-09-23 |
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| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150408 |