CN106374877A - Adjustable photoelectric conversion filter circuit - Google Patents
Adjustable photoelectric conversion filter circuit Download PDFInfo
- Publication number
- CN106374877A CN106374877A CN201610787677.3A CN201610787677A CN106374877A CN 106374877 A CN106374877 A CN 106374877A CN 201610787677 A CN201610787677 A CN 201610787677A CN 106374877 A CN106374877 A CN 106374877A
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- CN
- China
- Prior art keywords
- electric capacity
- operational amplifier
- adjustable
- filter
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/46—One-port networks
Abstract
The present invention relates to an adjustable photoelectric conversion filter circuit, belonging to the field of photoelectric communication technology application. The circuit comprises a filter module and an amplification module. The filter module and the amplification module are in serial connection. The filter module comprises a first capacitor C1 and an inductor L. An input end U1 of a filter is in serial connection with the first capacitor C1. The first capacitor C1 is connected with the amplification module and the inductor L. The first capacitor C1 is a capacitor with adjustable capacitance. According to the adjustable photoelectric conversion filter circuit, due to connection of the inductor and the capacitor, high-frequency or low-frequency filtering of the signal is implemented; and different filtering demands are met by using the capacitor with the adjustable capacitance, so that the signal quality is ensured, the use cost is lowered, overheat caused by existence of resistance in the circuit is prevented, and the service life of the filter is prolonged.
Description
Technical field
The present invention relates to a kind of filter circuit, more particularly, to a kind of adjustable opto-electronic conversion filter circuit, belong to photoelectricity
Conversion applied technical field.
Background technology
Wave filter (filter), is a kind of device for eliminating jamming incoherent signal, will input or export process and filter and obtain
To pure unidirectional current.The circuit that frequency beyond frequency to characteristic frequency or this frequency is effectively filtered out is it is simply that filter
Device, its function is exactly to obtain a characteristic frequency or eliminate a characteristic frequency.It is to ensure signal quality, often in photoelectricity transmission
Process signal by the way of filtering, existing wave filter is mostly typically lcr, and the capacitor c of use is often constant volume value, pin
To different filtering requirements, different electric capacity need to be changed, increased use cost, simultaneously as there is resistance r, wave filter is in work
Easily generate heat during work, have impact on the service life of wave filter.
Content of the invention
The present invention is exactly in view of the shortcomings of the prior art, there is provided a kind of adjustable opto-electronic conversion filter circuit.
For solving the above problems, the technical solution used in the present invention is as follows:
A kind of adjustable opto-electronic conversion filter circuit, including filtration module and amplification module, described filtration module and amplification mould
Block is connected, and filtration module includes the first electric capacity c1With inductance l, filter input end u1With the first electric capacity c1Series connection, the first electric capacity c1
It is connected with amplification module and inductance l respectively, described first electric capacity c1Electric capacity for adjustable condenser value.
Further, described amplification module includes the first operational amplifier a1, first resistor r1, the second electric capacity c2,
Two operational amplifier a2With second resistance r2, first resistor r1It is connected on the first operational amplifier a1Negater circuit on, and first
Operational amplifier a1With the second electric capacity c2Series connection, the second electric capacity c2With the second operational amplifier a2Series connection, second resistance r2Reversely go here and there
It is associated in the second operational amplifier a2On, the second operational amplifier a2Outfan and filter output u2Connect.
Further, described first electric capacity c1Can also phase double replacement with the installation site of inductance l.
Compared with prior art, the implementation result of the present invention is as follows for the present invention:
A kind of adjustable opto-electronic conversion filter circuit of the present invention, using being connected with each other as filtering of inductance and electric capacity
Circuit it is achieved that the high frequency of signal or low frequency filtering, using the electric capacity of adjustable condenser value, meet different filtering requirements it is ensured that
Signal quality, reduces use cost, avoids simultaneously and overheated phenomenon occurs because of the presence of resistance in circuit, it is to avoid mistake
Degree heating, the use of impact wave filter, improve service life.
Brief description
Fig. 1 is a kind of adjustable opto-electronic conversion filter circuit High frequency filter schematic diagram of the present invention；
Fig. 2 is a kind of adjustable opto-electronic conversion filter circuit low frequency filtering schematic diagram shown in the present invention；
Wherein, 10 filtration modules, 11 first electric capacity c1, 12 inductance l, 20 amplification modules, 21 first operation amplifiers
Device a1, 22 first resistors r1, 23 second electric capacity c2, 24 second operational amplifier a2, 25 second resistances r2.
Specific embodiment
Present disclosure to be described below in conjunction with specific embodiments.
If Fig. 1 is a kind of adjustable opto-electronic conversion filter circuit High frequency filter schematic diagram of the present invention, described one kind
Adjustable opto-electronic conversion filter circuit, including filtration module 10 and amplification module 20, described filtration module 10 and amplification module
20 series connection, filtration module 10 includes the first electric capacity c111 and inductance l12, filter input end u1With the first electric capacity c111 series connection, the
One electric capacity c111 are connected with amplification module 20 and inductance l12 respectively, described first electric capacity c111 is the electric capacity of adjustable condenser value.
Using inductance l12 and the first electric capacity c111 be connected with each other as filter circuit it is achieved that the high frequency of signal or low frequency filtering, profit
With the electric capacity of adjustable condenser value, meet different filtering requirements it is ensured that signal quality, reduce use cost, avoid simultaneously
There is overheated phenomenon because there is resistance, it is to avoid excessive heating in circuit, the use of impact wave filter, improve and use the longevity
Life.
Further, described amplification module 20 includes the first operational amplifier a121st, first resistor r122nd, the second electricity
Hold c223rd, the second operational amplifier a224 and second resistance r225, first resistor r122 are connected on the first operational amplifier a121
On negater circuit, and the first operational amplifier a121 and the second electric capacity c223 series connection, the second electric capacity c223 and second operational amplifier
a224 series connection, second resistance r225 differential concatenations are in the second operational amplifier a2On 24, the second operational amplifier a223 outfans and
Filter output u2Connect.By the first operational amplifier a121 and the second operational amplifier a223 synergy, realizes filter
The second order of ripple signal amplifies it is ensured that signal is distortionless amplifies output simultaneously.
Fig. 2 is a kind of adjustable opto-electronic conversion filter circuit low frequency filtering schematic diagram shown in the present invention as shown in Figure 2,
Described first electric capacity c111 and the location swap of inductance l12, wave filter can carry out low-pass filtering.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (3)
1. a kind of adjustable opto-electronic conversion filter circuit, is characterized in that, including filtration module (10) and amplification module (20), institute
State filtration module (10) and amplification module (20) series connection, filtration module (10) includes the first electric capacity c1(11) and inductance l(12), filter
Ripple device input u1With the first electric capacity c1(11) connect, the first electric capacity c1(11) respectively with amplification module (20) and inductance l(13) even
Connect, described first electric capacity c1(11) for the electric capacity of adjustable condenser value.
2. a kind of adjustable opto-electronic conversion filter circuit as claimed in claim 1, is characterized in that, described amplification module (20) bag
Include the first operational amplifier a1(21), first resistor r1(22), the second electric capacity c2(23), the second operational amplifier a2(24) and the
Two resistance r2(25), first resistor r1(22) it is connected on the first operational amplifier a1Negater circuit on, and the first operational amplifier
a1(21) and the second electric capacity c2(23) connect, the second electric capacity c2(23) and the second operational amplifier a2(24) connect, second resistance r2
(25) differential concatenation is in the second operational amplifier a2(24) on, the second operational amplifier a2(23) outfan and filter output
u2Connect.
3. a kind of adjustable opto-electronic conversion filter circuit as claimed in claim 1 or 2, is characterized in that, described first electric capacity c1
(11) and inductance l(12) installation site can also phase double replacement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610787677.3A CN106374877A (en) | 2016-08-31 | 2016-08-31 | Adjustable photoelectric conversion filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610787677.3A CN106374877A (en) | 2016-08-31 | 2016-08-31 | Adjustable photoelectric conversion filter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106374877A true CN106374877A (en) | 2017-02-01 |
Family
ID=57899805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610787677.3A Pending CN106374877A (en) | 2016-08-31 | 2016-08-31 | Adjustable photoelectric conversion filter circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106374877A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109257029A (en) * | 2018-08-31 | 2019-01-22 | 维沃移动通信有限公司 | tunable filter circuit and terminal device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102468813A (en) * | 2010-11-05 | 2012-05-23 | 日立视听媒体股份有限公司 | Tunable filter, tunable duplexer and mobile communication terminal using the same |
| CN203416230U (en) * | 2013-08-09 | 2014-01-29 | 天津国强科技有限公司 | Filter |
| CN203883784U (en) * | 2014-06-06 | 2014-10-15 | 绥化学院 | A novel filter |
| CN104202006A (en) * | 2014-09-01 | 2014-12-10 | 王少夫 | Adjustable simple low-pass filtering circuit |
| CN205051664U (en) * | 2015-04-30 | 2016-02-24 | 天津锐宇鸿图科技发展有限公司 | Filter |
-
2016
- 2016-08-31 CN CN201610787677.3A patent/CN106374877A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102468813A (en) * | 2010-11-05 | 2012-05-23 | 日立视听媒体股份有限公司 | Tunable filter, tunable duplexer and mobile communication terminal using the same |
| CN203416230U (en) * | 2013-08-09 | 2014-01-29 | 天津国强科技有限公司 | Filter |
| CN203883784U (en) * | 2014-06-06 | 2014-10-15 | 绥化学院 | A novel filter |
| CN104202006A (en) * | 2014-09-01 | 2014-12-10 | 王少夫 | Adjustable simple low-pass filtering circuit |
| CN205051664U (en) * | 2015-04-30 | 2016-02-24 | 天津锐宇鸿图科技发展有限公司 | Filter |
Non-Patent Citations (2)
| Title |
|---|
| O.BRAND 等: "《CMOS MEMS技术与应用》", 31 July 2007, 东南大学出版社 * |
| 姜雪松 等: "《电磁兼容与PCB设计》", 28 February 2008, 机械工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109257029A (en) * | 2018-08-31 | 2019-01-22 | 维沃移动通信有限公司 | tunable filter circuit and terminal device |
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| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170201 |