CN204316463U - A kind of frequency stabilization filter - Google Patents
A kind of frequency stabilization filter Download PDFInfo
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- CN204316463U CN204316463U CN201420698461.6U CN201420698461U CN204316463U CN 204316463 U CN204316463 U CN 204316463U CN 201420698461 U CN201420698461 U CN 201420698461U CN 204316463 U CN204316463 U CN 204316463U
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Abstract
The utility model discloses a kind of frequency stabilization filter, by FM circuit, the trimming circuit be simultaneously connected with FM circuit and phase lock circuitry, and the feedback circuit be connected with phase lock circuitry forms.Described phase lock circuitry is by triode VT1, and triode VT2, triode VT3, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, electric capacity C4, electric capacity C5, electric capacity C6 form; The utility model is provided with phase lock circuitry, and it can make filtered frequency more stable, avoids because frequency fluctuation impacts electrical appliance.
Description
Technical field
The utility model relates to a kind of electronic device, specifically refers to a kind of frequency stabilization filter.
Background technology
Along with the development of electronic market, filter is also more and more widely used the device that signal plays process effect as a kind of, such as, all need to use filter in fields such as medical treatment, industrial production.But the filter of commercial type at present, its filtered frequency is also unstable, brings very large impact to electrical appliance.
Utility model content
The purpose of this utility model is to overcome the defect of frequency instability after existing filter filtering, provide a kind of can the frequency stabilization filter of outputting stable frequency.
The purpose of this utility model is achieved through the following technical solutions: a kind of frequency stabilization filter, by FM circuit, and the trimming circuit be simultaneously connected with FM circuit and phase lock circuitry, and the feedback circuit be connected with phase lock circuitry forms.Described phase lock circuitry is by triode VT1, and triode VT2, triode VT3, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, electric capacity C4, electric capacity C5, electric capacity C6 form, the positive pole of electric capacity C4 is connected with FM circuit, negative pole is connected with the base stage of triode VT1, one end of resistance R7 is connected with the base stage of triode VT1, the other end is connected with the collector electrode of triode VT1, resistance R8, resistance R9, resistance R10, resistance R11, one end of resistance R12 is all connected with the base stage of triode VT1, the other end of resistance R8 is connected with the collector electrode of triode VT1, the other end of resistance R9 is connected with the collector electrode of triode VT2, the other end of resistance R10 is connected with the base stage of triode VT3, the other end of resistance R11 is connected with the base stage of triode VT2, the other end of resistance R12 is connected with the collector electrode of triode VT3, the positive pole of electric capacity C5 is connected with the emitter of triode VT1, negative pole is connected with the base stage of triode VT3, the positive pole of electric capacity C6 is connected with the base stage of triode VT2, negative pole is connected with the collector electrode of triode VT3, the collector and emitter of described triode VT3 is all connected with feedback circuit, the emitter of triode VT2 is connected with the emitter of triode VT3, the collector electrode of triode VT1 is connected with the emitter of triode VT3, base stage is connected with feedback circuit with FM circuit simultaneously.
Described FM circuit is by resistance R1, and resistance R2, resistance R3, electric capacity C1, electric capacity C2, electric capacity C3 and potentiometer R4 form; The positive pole of electric capacity C1 is connected with its negative pole in turn after resistance R1, resistance R2, potentiometer R4 and electric capacity C3, resistance R3 and potentiometer R4 is in parallel, and the positive pole of electric capacity C2 is connected with the tie point of resistance R2 with resistance R1, negative pole is then connected with the positive pole of electric capacity C4; The negative pole of described electric capacity C3 is connected with the positive pole of electric capacity C4, its positive pole is connected with trimming circuit, and resistance R3 is all connected with the base stage of triode VT1 with two common ends of potentiometer R4.
Described trimming circuit comprises resistance R5, potentiometer R6; One end of resistance R5 is connected with the negative pole of electric capacity C1, its other end is then connected with the positive pole of electric capacity C4 after potentiometer R8, and the control end of potentiometer R8 is connected with the positive pole of electric capacity C4.
Described feedback circuit by operational amplifier P1, operational amplifier P2, one end is connected with the output stage of operational amplifier P2, other end resistance R13 of ground connection after potentiometer R14 forms; The negative pole of described amplifier P2 is simultaneously with the base stage of triode VT1 and its output stage is connected, positive pole is then connected with the negative pole of electric capacity C6, and the output stage of amplifier P1 is connected with the emitter of triode VT3, negative pole is connected with its output stage, positive pole is then connected with the control end of potentiometer R14.
The utility model comparatively prior art is compared, and has the following advantages and beneficial effect:
(1) the utility model is provided with phase lock circuitry, and it can make filtered frequency more stable, avoids because frequency fluctuation impacts electrical appliance.
(2) the utility model is provided with FM circuit, and it can change the scope of filter process frequency, makes filter be applicable to close kind of a different occasion.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but execution mode of the present utility model is not limited to this.
Embodiment
As shown in Figure 1, frequency stabilization filter of the present utility model, by FM circuit, the trimming circuit be simultaneously connected with FM circuit and phase lock circuitry, and the feedback circuit be connected with phase lock circuitry forms.
Phase lock circuitry is emphasis of the present utility model, and it is by triode VT1, triode VT2, triode VT3, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, electric capacity C4, electric capacity C5, and electric capacity C6 forms, the positive pole of electric capacity C4 is connected with FM circuit, negative pole is connected with the base stage of triode VT1, one end of resistance R7 is connected with the base stage of triode VT1, the other end is connected with the collector electrode of triode VT1, resistance R8, resistance R9, resistance R10, resistance R11, one end of resistance R12 is all connected with the base stage of triode VT1, the other end of resistance R8 is connected with the collector electrode of triode VT1, the other end of resistance R9 is connected with the collector electrode of triode VT2, the other end of resistance R10 is connected with the base stage of triode VT3, the other end of resistance R11 is connected with the base stage of triode VT2, the other end of resistance R12 is connected with the collector electrode of triode VT3, the positive pole of electric capacity C5 is connected with the emitter of triode VT1, negative pole is connected with the base stage of triode VT3, the positive pole of electric capacity C6 is connected with the base stage of triode VT2, negative pole is connected with the collector electrode of triode VT3, the collector and emitter of described triode VT3 is all connected with feedback circuit, the emitter of triode VT2 is connected with the emitter of triode VT3, the collector electrode of triode VT1 is connected with the emitter of triode VT3, base stage is connected with feedback circuit with FM circuit simultaneously.Phase lock circuitry can locking frequency phase place, makes filtered frequency more stable, avoids because frequency fluctuation impacts electrical appliance.
FM circuit can adjust frequency filtering, makes the range of application of filter wider.It is by resistance R1, resistance R2, resistance R3, electric capacity C1, electric capacity C2, and electric capacity C3 and potentiometer R4 forms; The positive pole of electric capacity C1 is connected with its negative pole in turn after resistance R1, resistance R2, potentiometer R4 and electric capacity C3, resistance R3 and potentiometer R4 is in parallel, and the positive pole of electric capacity C2 is connected with the tie point of resistance R2 with resistance R1, negative pole is then connected with the positive pole of electric capacity C4; The negative pole of described electric capacity C3 is connected with the positive pole of electric capacity C4, its positive pole is connected with trimming circuit, and resistance R3 is all connected with the base stage of triode VT1 with two common ends of potentiometer R4.
Trimming circuit comprises resistance R5, potentiometer R6; One end of resistance R5 is connected with the negative pole of electric capacity C1, its other end is then connected with the positive pole of electric capacity C4 after potentiometer R8, and the control end of potentiometer R8 is connected with the positive pole of electric capacity C4.
Feedback circuit by operational amplifier P1, operational amplifier P2, one end is connected with the output stage of operational amplifier P2, other end resistance R13 of ground connection after potentiometer R14 forms; The negative pole of described amplifier P2 is simultaneously with the base stage of triode VT1 and its output stage is connected, positive pole is then connected with the negative pole of electric capacity C6, and the output stage of amplifier P1 is connected with the emitter of triode VT3, negative pole is connected with its output stage, positive pole is then connected with the control end of potentiometer R14.
As mentioned above, just well the utility model can be implemented.
Claims (4)
1. a frequency stabilization filter, by FM circuit, the trimming circuit be simultaneously connected with FM circuit and phase lock circuitry, and the feedback circuit to be connected with phase lock circuitry forms, described phase lock circuitry by triode VT1, triode VT2, triode VT3, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, electric capacity C4, electric capacity C5, electric capacity C6 form, the positive pole of electric capacity C4 is connected with FM circuit, negative pole is connected with the base stage of triode VT1, one end of resistance R7 is connected with the base stage of triode VT1, the other end is connected with the collector electrode of triode VT1, resistance R8, resistance R9, resistance R10, resistance R11, one end of resistance R12 is all connected with the base stage of triode VT1, the other end of resistance R8 is connected with the collector electrode of triode VT1, the other end of resistance R9 is connected with the collector electrode of triode VT2, the other end of resistance R10 is connected with the base stage of triode VT3, the other end of resistance R11 is connected with the base stage of triode VT2, the other end of resistance R12 is connected with the collector electrode of triode VT3, the positive pole of electric capacity C5 is connected with the emitter of triode VT1, negative pole is connected with the base stage of triode VT3, the positive pole of electric capacity C6 is connected with the base stage of triode VT2, negative pole is connected with the collector electrode of triode VT3, the collector and emitter of described triode VT3 is all connected with feedback circuit, the emitter of triode VT2 is connected with the emitter of triode VT3, the collector electrode of triode VT1 is connected with the emitter of triode VT3, base stage is connected with feedback circuit with FM circuit simultaneously.
2. a kind of frequency stabilization filter according to claim 1, is characterized in that: described FM circuit is by resistance R1, and resistance R2, resistance R3, electric capacity C1, electric capacity C2, electric capacity C3 and potentiometer R4 form; The positive pole of electric capacity C1 is connected with its negative pole in turn after resistance R1, resistance R2, potentiometer R4 and electric capacity C3, resistance R3 and potentiometer R4 is in parallel, and the positive pole of electric capacity C2 is connected with the tie point of resistance R2 with resistance R1, negative pole is then connected with the positive pole of electric capacity C4; The negative pole of described electric capacity C3 is connected with the positive pole of electric capacity C4, its positive pole is connected with trimming circuit, and resistance R3 is all connected with the base stage of triode VT1 with two common ends of potentiometer R4.
3. a kind of frequency stabilization filter according to claim 2, is characterized in that: described trimming circuit comprises resistance R5, potentiometer R6; One end of resistance R5 is connected with the negative pole of electric capacity C1, its other end is then connected with the positive pole of electric capacity C4 after potentiometer R8, and the control end of potentiometer R8 is connected with the positive pole of electric capacity C4.
4. a kind of frequency stabilization filter according to claim 3, it is characterized in that: described feedback circuit is by operational amplifier P1, operational amplifier P2, one end is connected with the output stage of operational amplifier P2, other end resistance R13 of ground connection after potentiometer R14 forms; The negative pole of described amplifier P2 is simultaneously with the base stage of triode VT1 and its output stage is connected, positive pole is then connected with the negative pole of electric capacity C6, and the output stage of amplifier P1 is connected with the emitter of triode VT3, negative pole is connected with its output stage, positive pole is then connected with the control end of potentiometer R14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420698461.6U CN204316463U (en) | 2014-11-19 | 2014-11-19 | A kind of frequency stabilization filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420698461.6U CN204316463U (en) | 2014-11-19 | 2014-11-19 | A kind of frequency stabilization filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204316463U true CN204316463U (en) | 2015-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420698461.6U Active CN204316463U (en) | 2014-11-19 | 2014-11-19 | A kind of frequency stabilization filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204316463U (en) |
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2014
- 2014-11-19 CN CN201420698461.6U patent/CN204316463U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Ma Dongsheng Inventor before: Zhou Pengcheng Inventor before: Liu Fang |
|
| COR | Change of bibliographic data | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160517 Address after: 100085 Beijing city Haidian District Xueqing Road No. 9 Ebizal building B1002 Patentee after: BEIJING DAHUA HENGWEI COMMUNICATION TECHNOLOGY CO., LTD. Address before: 610000 Sichuan city of Chengdu province high tech Zone Guixi Industrial Park Patentee before: Chengdu NeoCreatec Corp. Ltd. |