CN203225767U - Single-stage bandwidth-controlling light receiver with small output voltage deviation - Google Patents
Single-stage bandwidth-controlling light receiver with small output voltage deviation Download PDFInfo
- Publication number
- CN203225767U CN203225767U CN 201320205844 CN201320205844U CN203225767U CN 203225767 U CN203225767 U CN 203225767U CN 201320205844 CN201320205844 CN 201320205844 CN 201320205844 U CN201320205844 U CN 201320205844U CN 203225767 U CN203225767 U CN 203225767U
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- resistance
- switch
- pass filter
- output
- high pass
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- 230000003287 optical effect Effects 0.000 claims description 17
- 239000003990 capacitor Substances 0.000 abstract description 12
- 230000003321 amplification Effects 0.000 abstract description 4
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 4
- 230000003750 conditioning effect Effects 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000013307 optical fiber Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/44—Electric circuits
- G01J1/46—Electric circuits using a capacitor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Amplifiers (AREA)
Abstract
The utility model discloses a single-stage bandwidth-controlling light receiver with small output voltage deviation, comprising a photodiode, a high pass filter and an amplification circuit. The high pass filter circuit comprises two capacitors, two resistors and four switches, wherein each switch is connected to one resistor or one capacitor in series, the two capacitors are connected in parallel and the two resistors are connected in parallel. The capacitors, the resistors and the switches constitute the serial high pass filter. The output terminal of the photodiode is connected to the input terminal of the high pass filter; the output terminal of the high pass filter is connected to the input terminal of the amplification circuit; and the output terminal of the amplification circuit is the output terminal of the light receiver. By adding four switches in the high pass filter for controlling value or presence and absence of capacitance and resistance, the single-stage bandwidth controlling light receiver with small output voltage deviation can change frequency bandwidth of the output signal, achieve adjusting of bandwidth, realize signal conditioning and minimize the distortion degree of the received signals. Furthermore, small output voltage deviation is achieved as well.
Description
Technical field
The utility model relates to a kind of optical receiver, relates in particular to the little single-stage bandwidth controllable light receiver of the adjustable output voltage deviation of a kind of output signal bandwidth.
Background technology
Optical receiver is the equipment of receiving optical signals, generally includes photodetector, filter and amplifier.In optical fiber telecommunications system, the task of optical receiver is with the additional noise of minimum and distortion, recover after the Optical Fiber Transmission by the entrained information of light carrier, so the output characteristic concentrated expression of optical receiver the performance of whole optical fiber telecommunications system.
The light signal of optical sender emission is after transmission, and amplitude fading, and impulse waveform not only is broadening also, and the effect of optical receiver is exactly the faint optical signal that detects through transmission, and amplification, shaping, the former transmission signal of regeneration.
In the optical receiver, the main effect of photodetector is to utilize photoelectric effect that light signal is changed into the signal of telecommunication.In optical communication system, to the requirement of photodetector be highly sensitive, response is fast, noise is little, cost is low and reliability is high.The basic principle of Photoelectric Detection process is light absorption.At present, photodetector commonly used is photodiode, avalanche photodide in optical communication system.Because the signal that receives of optical receiver is very faint, in addition under the disturbed condition of high background noise field, can cause receiving terminal signal to noise ratio S/N＜1 again, so be very necessary to Signal Processing.Usually take filter and amplifier that the signal of telecommunication of photodetector output is handled.
The filter of existing optical receiver, generally take the permanent circuit structure to realize filtering, that is to say that its frequency filtering fixes, so the signal bandwidth of final output is fixed, be unfavorable for like this regulating to received signal, be difficult to accomplish with signal distortion drop to level off to minimum.
The utility model content
The purpose of this utility model provides the adjustable output voltage deviation of a kind of output signal bandwidth little single-stage bandwidth controllable light receiver with regard to being in order to address the above problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The single-stage bandwidth controllable light receiver that output voltage deviation described in the utility model is little comprises photodiode, high pass filter and amplifying circuit, and the output of described amplifying circuit is the output of described optical receiver; Described high pass filter comprises first electric capacity, second electric capacity, first resistance, second resistance, first switch, second switch, the 3rd switch and the 4th switch, described amplifying circuit comprises amplifier, the 3rd resistance and the 4th resistance, the negative pole of described photodiode, first end of described first electric capacity and first end of described second electric capacity interconnect, second end of described first electric capacity is connected with first end of described first switch, second end of described second electric capacity, second end with described first switch of connecting behind the described second switch, first end of described first resistance is connected with first end of described second resistance, second end of described first resistance is connected with first end of described the 3rd switch, second end of described second resistance is connected and is connected with second end of described the 3rd switch and the positive signal input of described amplifier simultaneously behind described the 4th switch, the output of described amplifier is connected with first end of described the 3rd resistance, second end of described the 3rd resistance is connected with the negative signal input of described amplifier and first end of described the 4th resistance simultaneously, second end of described the 4th resistance is connected with the positive pole of described photodiode, and second end of the output of described amplifier and described the 4th resistance is the output of described amplifying circuit.
The beneficial effects of the utility model are:
The utility model is by increasing the big or small of four switch control capacitance values, resistance value and having or not in high frequency filter, thereby change the frequency bandwidth of output signal, the realization bandwidth is adjustable, be conducive to regulate to received signal, signal distortion is dropped to as far as possible and level off to minimumly, realize the purpose that the output voltage deviation is little simultaneously.
Description of drawings
Fig. 1 is the circuit diagram of the little single-stage bandwidth controllable light receiver of output voltage deviation described in the utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, the single-stage bandwidth controllable light receiver that output voltage deviation described in the utility model is little comprises photodiode VD, high pass filter and amplifying circuit; High pass filter comprises first capacitor C 1, second capacitor C 2, first resistance R 1, second resistance R 2, first K switch 1, second switch K2, the 3rd K switch 3 and the 4th K switch 4, amplifying circuit comprises amplifier IC1, the 3rd resistance R 3 and the 4th resistance R 4, the negative pole of photodiode VD, first end of first end of first capacitor C 1 and second capacitor C 2 interconnects, second end of first capacitor C 1 is connected with first end of first K switch 1, behind second end of the second capacitor C 2 series connection second switch K2 with second end of first K switch 1, first end of first resistance R 1 is connected with first end of second resistance R 2, second end of first resistance R 1 is connected with first end of the 3rd K switch 3, second end of second resistance R 2 is connected 4 back connections with second end of the 3rd K switch 3 and the positive signal input of amplifier IC1 simultaneously of the 4th K switch, the output of amplifier IC1 is connected with first end of the 3rd resistance R 3, second end of the 3rd resistance R 3 is connected with the negative signal input of amplifier IC1 and first end of the 4th resistance R 4 simultaneously, second end of the 4th resistance R 4 is connected with the positive pole of photodiode VD, second end of the output of amplifier IC1 and the 4th resistance R 4 is the output of amplifying circuit, and the output of amplifying circuit is the output Uo of optical receiver.
As shown in Figure 1, first capacitor C 1 is or/and second capacitor C 2, and first resistance R 1 or/and second resistance R 2 is formed high pass filter with the form of series connection, by changing the on off state of first K switch 1, second switch K2, the 3rd K switch 3 and the 4th K switch 4, can change the size of capacitance and resistance value in the filter and have or not, thereby change the cut-off frequency of filter, the bandwidth of amplifying the signal of output through amplifying circuit is also changed, therefore the output signal frequency bandwidth of optical receiver can be adjusted to the best, reduce signal distortion as far as possible.
Claims (1)
1. the single-stage bandwidth controllable light receiver that the output voltage deviation is little comprises photodiode, high pass filter and amplifying circuit, and the output of described amplifying circuit is the output of described optical receiver; It is characterized in that: described high pass filter comprises first electric capacity, second electric capacity, first resistance, second resistance, first switch, second switch, the 3rd switch and the 4th switch, described amplifying circuit comprises amplifier, the 3rd resistance and the 4th resistance, the negative pole of described photodiode, first end of described first electric capacity and first end of described second electric capacity interconnect, second end of described first electric capacity is connected with first end of described first switch, second end of described second electric capacity, second end with described first switch of connecting behind the described second switch, first end of described first resistance is connected with first end of described second resistance, second end of described first resistance is connected with first end of described the 3rd switch, second end of described second resistance is connected and is connected with second end of described the 3rd switch and the positive signal input of described amplifier simultaneously behind described the 4th switch, the output of described amplifier is connected with first end of described the 3rd resistance, second end of described the 3rd resistance is connected with the negative signal input of described amplifier and first end of described the 4th resistance simultaneously, second end of described the 4th resistance is connected with the positive pole of described photodiode, and second end of the output of described amplifier and described the 4th resistance is the output of described amplifying circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320205844 CN203225767U (en) | 2013-04-23 | 2013-04-23 | Single-stage bandwidth-controlling light receiver with small output voltage deviation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320205844 CN203225767U (en) | 2013-04-23 | 2013-04-23 | Single-stage bandwidth-controlling light receiver with small output voltage deviation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203225767U true CN203225767U (en) | 2013-10-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320205844 Expired - Fee Related CN203225767U (en) | 2013-04-23 | 2013-04-23 | Single-stage bandwidth-controlling light receiver with small output voltage deviation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203225767U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016145123A1 (en) * | 2015-03-09 | 2016-09-15 | Cubic Corporation | Optical sensor for range finding and wind sensing measurements |
-
2013
- 2013-04-23 CN CN 201320205844 patent/CN203225767U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016145123A1 (en) * | 2015-03-09 | 2016-09-15 | Cubic Corporation | Optical sensor for range finding and wind sensing measurements |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131002 Termination date: 20140423 |