CN203225769U - Low-power single-stage bandwidth controllable light receiver - Google Patents
Low-power single-stage bandwidth controllable light receiver Download PDFInfo
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- CN203225769U CN203225769U CN 201320205972 CN201320205972U CN203225769U CN 203225769 U CN203225769 U CN 203225769U CN 201320205972 CN201320205972 CN 201320205972 CN 201320205972 U CN201320205972 U CN 201320205972U CN 203225769 U CN203225769 U CN 203225769U
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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
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 230000001276 controlling 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
- 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
- 238000007493 shaping process Methods 0.000 description 1
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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
This utility model discloses a low-power single-stage bandwidth controllable light receiver, which comprises a photodiode, a high pass filter and an amplification circuit. The high pass filter consists of two capacitors and four switches. Each switch is connected to the capacitor or a resistor in series. Two capacitors are connected in parallel; two resistors are connected in parallel; and the capacitors, the resistors and the switches constituted the high pass filter by connecting in parallel. 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 increasing the numbers of switches for controlling capacitance and resistance value, frequency bandwidth of the outputted signals can be adjustable as a result. This utility model is beneficial for regulating the received signals and reducing degree of distortion of the signals to the minimum. Meanwhile, the simplified circuit structure and manual throw-over switches achieve low power consumption.
Description
Technical field
The utility model relates to a kind of optical receiver, relates in particular to the adjustable low-power consumption single-stage bandwidth controllable light receiver 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 a kind of output signal bandwidth adjustable low-power consumption 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:
Low-power consumption single-stage bandwidth controllable light receiver described in the utility model 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 simultaneously, first end of described first resistance, first end of described second resistance and the positive signal input of described amplifier are connected, second end of described first resistance is connected with first end of described the 3rd switch, second end of described second resistance positive pole with described photodiode of connecting behind described the 4th switch simultaneously, second end of described the 3rd switch is connected with first end of described the 4th resistance, second end of described the 4th resistance, first end of described the 3rd resistance and the negative signal input of described amplifier interconnect, second end of described the 3rd resistance is connected with the output of described amplifier, and first 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 a plurality of 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, is conducive to regulate to received signal, signal distortion is dropped to as far as possible level off to minimum; Simultaneously, by simplifying circuit structure, adopt manual throw-over switch, realize the low-power consumption purpose.
Description of drawings
Fig. 1 is the circuit diagram of low-power consumption single-stage bandwidth controllable light receiver 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, low-power consumption single-stage bandwidth controllable light receiver described in the utility model 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 simultaneously with second end of first K switch 1, first end of first resistance R 1, first end of second resistance R 2 is connected with the positive signal input of amplifier IC1, 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 connect the 4th K switch 4 back simultaneously with the positive pole of photodiode VD, second end of the 3rd K switch 3 is connected with first end of the 4th resistance R 4, second end of the 4th resistance R 4, first end of the 3rd resistance R 3 and the negative signal input of amplifier IC1 interconnect, second end of the 3rd resistance R 3 is connected with the output of amplifier IC1, first 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 U of optical receiver
O
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 parallel 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. a low-power consumption single-stage bandwidth controllable light receiver 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 simultaneously, first end of described first resistance, first end of described second resistance and the positive signal input of described amplifier are connected, second end of described first resistance is connected with first end of described the 3rd switch, second end of described second resistance positive pole with described photodiode of connecting behind described the 4th switch simultaneously, second end of described the 3rd switch is connected with first end of described the 4th resistance, second end of described the 4th resistance, first end of described the 3rd resistance and the negative signal input of described amplifier interconnect, second end of described the 3rd resistance is connected with the output of described amplifier, and first 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 201320205972 CN203225769U (en) | 2013-04-23 | 2013-04-23 | Low-power single-stage bandwidth controllable light receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320205972 CN203225769U (en) | 2013-04-23 | 2013-04-23 | Low-power single-stage bandwidth controllable light receiver |
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| Publication Number | Publication Date |
|---|---|
| CN203225769U true CN203225769U (en) | 2013-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320205972 Expired - Fee Related CN203225769U (en) | 2013-04-23 | 2013-04-23 | Low-power single-stage bandwidth controllable light receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203225769U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709825A (en) * | 2017-10-25 | 2019-05-03 | 意法半导体(R&D)有限公司 | The method of control circuit and operation control circuit |
-
2013
- 2013-04-23 CN CN 201320205972 patent/CN203225769U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709825A (en) * | 2017-10-25 | 2019-05-03 | 意法半导体(R&D)有限公司 | The method of control circuit and operation control circuit |
| US11031511B2 (en) | 2017-10-25 | 2021-06-08 | Stmicroelectronics (Research & Development) Limited | Control circuit and method of operating a control circuit |
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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 |