CN106781424A - Infrared receiving circuit - Google Patents
Infrared receiving circuit Download PDFInfo
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- CN106781424A CN106781424A CN201710014195.9A CN201710014195A CN106781424A CN 106781424 A CN106781424 A CN 106781424A CN 201710014195 A CN201710014195 A CN 201710014195A CN 106781424 A CN106781424 A CN 106781424A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
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- 238000001914 filtration Methods 0.000 claims description 7
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- 238000003199 nucleic acid amplification method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
- G08C23/04—Non-electrical signal transmission systems, e.g. optical systems using light waves, e.g. infrared
Abstract
A kind of infrared receiving circuit, including photodiode；Signal detection module, the signal detection module is connected with the photodiode, and for detecting whether the photodiode has electric current to export, when having detected electric current and exporting, output enables signal；Main receiver module, the main receiver module is connected with photodiode and signal detection module, for after enable signal is received, the current signal that photodiode is exported is converted to voltage signal and analog-to-digital conversion is carried out to the voltage signal and forms data signal, and export the data signal.The infrared receiving circuit power consumption and cost are relatively low.
Description
Technical field
The present invention relates to the communications field, more particularly to a kind of infrared receiving circuit.
Background technology
At present, oneself warp of IR remote controller turns into the standarized component of household electrical appliance.Television set, video recorder, DVD, audio frequency power amplifier,
Nearly all function of the equipment such as the infrared copy meter inside air-conditioning, national grid can be controlled by IR remote controller.
Fig. 1 a are the isoboles of infrared transtation mission circuit, and Fig. 1 b are the isoboles of infrared receiving circuit.
In Fig. 1 a, the encoded modules 111 of input signal In are encoded, then by voltage to electric current modulus of conversion
Voltage signal is converted into current signal by block 112, light emitting diode 113 is sent infrared light.
In Fig. 1 b, the photodiode 121 is received after infrared light, current signal is produced, through overcurrent to voltage
Modular converter 122 changes into voltage signal, then is decoded by decoder module 123, obtains output signal.
Circuit in traditional infrared receiving circuit such as Fig. 1 b, is all packaged on independent chip, is unfavorable for system
Integrated, and high cost, power consumption is big.
Need to propose it is a kind of new beneficial to integrated infrared receiving circuit, to reduce power consumption, cost-effective.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of infrared receiving circuit, cost-effective to reduce power consumption.
In order to solve the above problems, the invention provides a kind of infrared receiving circuit, including：Photodiode；Signal is examined
Module is surveyed, the signal detection module is connected with the photodiode, for detecting whether the photodiode has electric current
Signal output, when having detected current signal and exporting, output enables signal；Main receiver module, the main receiver module and light
Electric diode and signal detection module are connected, for the electric current letter for after enable signal is received, photodiode being exported
Number be converted to voltage signal and analog-to-digital conversion is carried out to the voltage signal and form data signal, and export the data signal.
Optionally, the signal detection module includes：Detection resistance, the two ends of the detection resistance respectively with the pole of photoelectricity two
The two ends connection of pipe；Comparator, the positive input terminal and negative input end of the comparator are respectively connecting to the two ends of detection resistance.
Optionally, the comparator carries system balance, for when there is voltage at the detection resistance two ends, output to be high electric
It is flat；When the detection resistance two ends do not have voltage, low level is exported.
Optionally, the signal detection module also includes：Digital filtering unit, the digital filtering unit compares with described
The output end connection of device, for being filtered shaping to output signal.
Optionally, first switch is connected between the main receiver module and the current output terminal of photodiode, it is described
First switch default conditions are off-state；It is connected between the signal detection module and the current output terminal of photodiode
Second switch, the second switch default conditions are conducting state.
Optionally, the enable signal of the signal detection module output is used to control the first switch to turn on, same to time control
The second switch is made to disconnect.
Optionally, also include：Digital module, the digital module is connected with main receiver module, is connect for receiving the master
Receive the data signal of module output.
Optionally, the digital module is additionally operable to after data signal is received, and sends reset signal, the reset letter
Number for controlling the first switch and second switch to recover to default conditions.
Optionally, the main receiver module includes：Current Voltage converting unit, amplifying unit and AD conversion unit；Institute
The current output terminal that Current Voltage converting unit is connected to the photodiode is stated, for export the photodiode
Current signal amplifies and is converted to voltage signal；The amplifying unit is connected to the Current Voltage converting unit, for by institute
The voltage signal for stating the output of Current Voltage converting unit amplifies；The AD conversion unit is connected with the amplifying unit, is used for
The voltage signal that the amplifying unit is exported is converted to data signal and exported.
Optionally, also include：Dark current suppression module, the electric current of the dark current suppression module and the photodiode
Output end is connected, for removing the dark current in output current.
Optionally, the dark current suppression module includes current lens unit, operational amplifier and low-pass filter circuit；It is described
Current lens unit is made up of two nmos pass transistors, and the input of the current lens unit is connected to power supply by PMOS transistor
End, the output end of the current lens unit is connected to the current output terminal of photodiode；The output end of the operational amplifier
The grid of the PMOS transistor is connected to by not gate, an input of the operational amplifier is connected to common-mode voltage end,
Another input is connected to the current output terminal of photodiode by the low-pass filter circuit.
Optionally, the low-pass filter circuit includes：Electric capacity and resistance；Described resistance one end is connected to photodiode
Current output terminal, the other end is connected to operational amplifier and the electric capacity；Described electric capacity one end is connected to the resistance, the other end
Ground connection.
Optionally, the operational amplifier is operated in negative-feedback state.
Infrared receiving circuit of the invention has signal detection module, only when signal detection module detects infrared signal
When, winner's receiver module is worked, so as to reduce the power consumption of circuit；Also, the infrared receiving circuit can also include dark
Electric current suppression module, the current signal for filtering photodiode output so that the signal that the infrared receiving circuit is received
It is more accurate；Also, the electronic component that the infrared receiving circuit is used can be integrated in CMOS technology, be easy to it is integrated,
Advantageously reduce circuit manufacturing cost.
Brief description of the drawings
Fig. 1 a are the equivalent structure schematic diagram of the infrared transtation mission circuit of prior art of the present invention；
Fig. 1 b are the equivalent structure schematic diagram of the infrared receiving circuit of prior art of the present invention；
Fig. 2 is the structural representation of the infrared receiving circuit of the embodiment of the invention；
Fig. 3 is the structural representation of the infrared receiving circuit of the embodiment of the invention；
Fig. 4 is the structural representation of the dark current suppression module in the infrared receiving circuit of the embodiment of the invention
Figure.
Specific embodiment
The specific embodiment of the infrared receiving circuit for providing the present invention below in conjunction with the accompanying drawings elaborates.
Fig. 2 is refer to, is the modular structure schematic diagram of the infrared structure circuit of the embodiment of the invention.
The infrared receiving circuit includes：Photodiode 210, signal detection module 220, the sum of main receiver module 230
Word modules 240.
The photodiode 210 is used to receive infrared signal, and the infrared light that for example IR remote controller sends produces electric current
Signal.
The signal detection module 220, the signal detection module 220 is connected with the photodiode 210, for examining
Survey whether the photodiode 210 has electric current to export, when having detected electric current and exporting, output enables signal.
Main receiver module 230, the main receiver module 230 connects with photodiode 210 and signal detection module 230
Connect, for receive signal detection module 220 output enable signal after, the current signal that photodiode 210 is exported
Be converted to voltage signal and analog-to-digital conversion is carried out to the voltage signal and form data signal, and export the data signal.
In this specific embodiment, the main receiver module 230 includes Current Voltage converting unit 231, amplifies and mould
Number converting unit 232.The Current Voltage converting unit 231 is used to be converted to the current signal that photodiode 210 is exported
Voltage signal, in a detailed embodiment, the Current Voltage converting unit 231 can include trans-impedance amplifier, be used for
Voltage signal output is amplified and be converted to current signal, and the electricity can be controlled by a gain control signal
Flow the multiplication factor of voltage conversion unit 231.The amplification and AD conversion unit 232 are used for Current Voltage converting unit
The voltage signal of 231 outputs is amplified, and the voltage signal after amplification is converted into data signal.The amplification and modulus turn
Changing unit 232 can include an amplifier module and a comparator module, and the amplifier module is used to carry out voltage signal
Amplify, the multiplication factor of the amplifier module by a gain control signal, can be controlled；It is right that the comparator module is used for
Voltage signal after amplification exports the data signal of full width by comparator more afterwards.
In this specific embodiment, the infrared receiving circuit also includes digital module 240, the digital module 240
It is connected with main receiver module 230, the data signal 230 for receiving the output of main receiver module 230.The digital module
240 can be used for carrying out the data signal for receiving the operation such as shaping, decoding.The digital module 240 is additionally operable to complete to believe
Number receive after, send a reset signal to signal detection module 220, be next time receive infrared signal prepare.The number
Word modules 240 can be integrated in infrared receiving circuit, it is also possible to outside the infrared receiving circuit, by circuit interface
It is connected to the output end of infrared receiving circuit.
The infrared receiving circuit automatically detects the electric current that photodiode 210 is produced by signal detection module 220
After signal, produce and enable signal, enable the main receiver module 230, main receiver module 230 receives photodiode 210 and produces
Current signal, and current signal is converted into voltage signal, amplify and analog-to-digital conversion after output digit signals to digital mould
Block 240.Digital module 240 sends a reset signal after completing to receive, and reset the signal detection module 220, is next time
Infrared signal is received to prepare.Due to the main receiver module 230 only after signal detection module 220 detects infrared signal
Enable, so that the characteristics of whole infrared receiving circuit has low-power consumption.
In this specific embodiment, the infrared receiving circuit also includes a dark current suppression module 250.Due to photoelectricity
Diode 210 can also produce electric current when infrared signal is received to optical signals such as natural light (sunshine) and fluorescent lamps, this
One part of current is referred to as dark current.The change of this portion of electrical current is slow, belongs to low frequency signal, although can be AC coupled capacitive part suppression
System, but when dark current is larger, can to the bias state of photodiode 210, and signal detection module 220 biasing and work
Make state and produce influence, so as to the reception accuracy to signal is impacted.The dark current suppression module 250 and the photoelectricity
The current output terminal connection of diode 210, for removing the dark current in output current, so as to improve the accurate of signal reception
Property.
Fig. 3 is refer to, is the circuit diagram of the infrared receiving circuit of the embodiment of the invention.
The infrared receiving circuit can also include Current Voltage biasing circuit (not shown in Fig. 3), for for described red
Outer receiving circuit provides each operating voltage, such as Vbias, Vcm, Vcomm.
The negative pole of the photodiode 210 is connected to biased electrical pressure side Vbias, in this specific embodiment, described
Biased electrical pressure side Vbias is connected to the negative pole of the photodiode, the voltage follower by a voltage follower 301
301 stability that can improve Vbias.
The signal detection module 220 of the infrared receiving circuit includes：Detection resistance Rin and comparator 221, the detection
Two ends of the two ends of resistance Rin respectively with photodiode 210 are connected, and the photodiode 210 is receiving infrared light letter
Number afterwards, current signal is produced.After the electric current of photodiode output is by detection resistance Rin, in the detection resistance Rin
Two ends produce voltage difference.In this specific embodiment, the current output terminal Out of the photodiode 210 by by Cin and
The filter circuit of R1 compositions is connected to the signal detection module 220 and main receiver module 230, and removal photoelectricity two is coupled by AC
Low-frequency component in the current signal of the output of pole pipe 210.
The positive input terminal and negative input end of the comparator 221 are respectively connecting to the two ends of the detection resistance Rin, work as institute
When stating detection resistance Rin two ends generation voltage difference, the comparator 221 exports corresponding detection signal.Of the invention specific
In implementation method, the positive input terminal of the comparator 221 is connected to the detection resistance and is connected with the negative pole of photodiode 210
One end, the negative input end of the comparator 221 is connected to the current output terminal Out of detection resistance Rin and photodiode 210
One end of connection, and the comparator 221 carries system balance, so that the comparator is in the detection resistance Rin
When there is voltage at two ends, high level is exported；When the detection resistance Rin two ends do not have voltage, low level is exported.The comparator
221 when signal is detected, and output high level makes main receiver module 230 work as signal is enabled.
The signal detection module 220 can also include：Digital filtering unit 222, the digital filtering unit 222 and institute
The output end connection of comparator 221 is stated, for being filtered shaping to output signal, output effectively enables signal.The numeral
Filter unit 222 can be made up of filter circuit, in other specific embodiments of the invention, it is also possible to without the numeral
Filter unit 222.
In this specific embodiment, the current output terminal Out of the signal detection module 220 and photodiode 210
Between be connected with second switch K2, specifically, the second switch K2 connects the current output terminal of the photodiode 210
Out and detection resistance Rin.The second switch K2 default conditions are conducting state so that the signal detection module 220 is certainly
It is dynamic that infrared signal is detected.After infrared signal is detected, the enable signal of the output of the signal detection module 220 makes
The circuit work of main receiver module 230, and cause that the second switch K2 disconnects, the detection of stop signal.
The main receiver module 230 includes：Current Voltage converting unit, is connected to the electric current output of the photodiode
End Out, for the current signal that the photodiode is exported to be amplified and is converted to voltage signal；Amplifying unit, is connected to
The Current Voltage converting unit, the voltage signal for the Current Voltage converting unit to be exported amplifies；Analog-to-digital conversion list
Unit, is connected with the amplifying unit, for the voltage signal that the amplifying unit is exported being converted into data signal and being exported extremely
Digital module.
In this specific embodiment, the Current Voltage converting unit includes trans-impedance amplifier 231 and resistance Rf1, institute
The negative input end for stating trans-impedance amplifier 231 is connected to the current output terminal Out of photodiode 210, and positive input terminal is connected to electricity
Pressure side Vcomm, the resistance Rf1 connect the output end and negative input end of the trans-impedance amplifier 231, the photodiode
210 output current is amplified by the trans-impedance amplifier 231 and is converted into voltage signal, output to amplifying unit.Institute
State voltage end Vcomm and common-mode voltage end Vcm is connected to by a voltage follower 302, the resistance Rf1 can be variable electricity
Resistance, is conveniently adjusted the multiplication factor of the Current Voltage converting unit.
In the specific embodiment, the amplifying unit includes operational amplifier 232, resistance Rf2 and resistance Rin2, described
The positive input terminal of operational amplifier 232 is connected to the output end of trans-impedance amplifier 231, and negative input end is connected to voltage end Vcomm,
The resistance Rf2 connects the output end of operational amplifier 232 and negative input end, and the resistance Rin2 connects the operation amplifier
The negative output terminal of device 232 and voltage end Vcomm.The amplifying unit is put to the voltage signal that trans-impedance amplifier 231 is exported
Greatly, and export to AD conversion unit.The resistance Rf2 can be variable resistor, be conveniently adjusted the amplification of the amplifying unit
Multiple.
In the specific embodiment, the AD conversion unit includes comparator 233, the positive input of the comparator 233
End is connected to reference voltage generation unit 234, and the reference voltage generation unit 234 is used for comparator input reference voltage
Vref, the other end of the comparator 233 is connected to the output end of operational amplifier 232, by the comparator 233 by voltage
Signal is converted to data signal output.
First switch K1 is connected between the main receiver module 230 and the current output terminal Out of photodiode 210,
Specifically, the current output terminal Out that the first switch K1 connects the photodiode 210 is negative with trans-impedance amplifier 231
Input.The first switch K1 default conditions are off-state, and infrared signal is not detected by the signal detection module 220
When, the main receiver module 230 does not work, and advantageously reduces the power consumption of the infrared receiving circuit.In one of the invention tool
In body implementation method, the output end of the signal detection module 220 is connected to the first switch K1 and second switch K2, works as institute
State after signal detection module 220 detects infrared signal, the enable signal of output turns on the first switch K1, makes the master
Receiver module 230 works, while disconnecting second switch K2.
In specific embodiment of the invention, the connection between the unit of main receiver module 230 can be adopted
Connected with AC coupled modes, to remove the low-frequency component in circuit, the dark current of photodiode 210 is reduced to greatest extent
Influence.
The infrared receiving circuit can also include digital module, and the digital module is additionally operable to receiving main reception mould
After the data signal that block 230 sends, a reset signal is sent, the reset signal is used to control the first switch K1 and the
Two switch K2 recover to default conditions, are to receive infrared signal next time to prepare.In the specific embodiment of the present invention
In, the reset signal output end of the digital module is connected to the first switch K1 and second switch K2.
The first switch K1 and second switch K2 can be single switch element, such as MOS transistor, triode or crystalline substance
Brake tube etc., or the circuit being made up of multiple switch element.
In this specific embodiment, the infrared receiving module also includes a dark current suppression module 250, the dark electricity
Stream suppression module one end is connected to common-mode voltage end Vcm, and the other end is connected to the current output terminal Out of photodiode.
Fig. 4 is refer to, is the circuit diagram of dark current suppression module 250 in the embodiment of the invention.
The dark current suppression module includes：The current lens unit being made up of nmos pass transistor N1 and N2, the current mirror
The input of unit is connected to power end Vdda by PMOS transistor P1, and the output end of the current lens unit is connected to photoelectricity
The current output terminal Out of diode 210；Operational amplifier A 1, the output end of the operational amplifier A 1 is connected by not gate 251
To the grid of the PMOS transistor P1, an input of the operational amplifier A 1 is connected to common-mode voltage end Vcm, another defeated
Enter the current output terminal Out that end is connected to photodiode 210 by a low-pass filter circuit, in this specific embodiment,
The operational amplifier A 1 is operated in negative-feedback state, is conducive to improving the stability of circuit.
In the specific embodiment, the low-pass filter circuit includes electric capacity C2 and resistance R2；Described resistance R2 one end connects
The current output terminal Out of photodiode 210 is connected to, the other end is connected to operational amplifier A 1 and the electric capacity C2；The electricity
Hold C2 one end and be connected to the resistance R2, other end ground connection.In other specific embodiments of the invention, the LPF
Circuit can also be other circuit structures.
After infrared signal is received, the current signal of output includes dark current with effectively letter to photodiode 210
Number electric current, the dark current is usually direct current or low-frequency current, the current signal by after low-pass filter circuit, electric current letter
Dark current in number produces voltage signal at the connection end two ends of resistance R2 and the negative input end of operational amplifier A 1, and input is to putting
The negative input end of big device A1, controls the PMOS transistor P1 to lead after amplifying, negated by not gate 251 again through the amplifier A1
It is logical.The multiplication factor of the amplifier A1 can be adjusted so that the PMOS transistor P1 flow to the electric current of nmos pass transistor N1
Dark current with photodiode 210 is consistent, due to current mirroring circuit effect so that also produce phase in the nmos pass transistor N2
Same electric current, so that in the current signal of the output of the photodiode 210, dark current flows into ground through nmos pass transistor N2
End so that the dark current component in current signal is suppressed, the photodiode 210 is described from current output terminal Out inputs
The electric current of signal detection module 220 and main receiver module 230 is the effective current signal produced by infrared signal irradiation, from
And the accuracy that the signal that can improve the infrared receiving circuit is received.
Above-mentioned infrared receiving circuit has signal detection module, only when signal detection module detects infrared signal,
Winner's receiver module is just set to work, so as to reduce the power consumption of circuit；Also, the infrared receiving circuit can also include dark current
Suppression module, the current signal for filtering photodiode output so that the signal that the infrared receiving circuit is received is more
Accurately；Also, the electronic component that the infrared receiving circuit is used can be integrated in CMOS technology, be easy to it is integrated, favorably
In reduction circuit manufacturing cost.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, under the premise without departing from the principles of the invention, can also make some improvements and modifications, and these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (13)
1. a kind of infrared receiving circuit, it is characterised in that including：
Photodiode；
Signal detection module, the signal detection module is connected with the photodiode, for detecting the photodiode
Whether there is current signal to export, when having detected current signal and exporting, output enables signal；
Main receiver module, the main receiver module is connected with photodiode and signal detection module, for making receiving
After energy signal, the current signal that photodiode is exported is converted to voltage signal and carries out analog-to-digital conversion to the voltage signal
Data signal is formed, and exports the data signal.
2. infrared receiving circuit according to claim 1, it is characterised in that the signal detection module includes：Detection electricity
Resistance, the two ends of the detection resistance are connected with the two ends of photodiode respectively；Comparator, the positive input terminal of the comparator and
Negative input end is respectively connecting to the two ends of detection resistance.
3. infrared receiving circuit according to claim 2, it is characterised in that the comparator carries system balance, is used for
When there is voltage at the detection resistance two ends, high level is exported；When the detection resistance two ends do not have voltage, low electricity is exported
It is flat.
4. the infrared receiving circuit according to Claims 2 or 3, it is characterised in that the signal detection module also includes：Number
Word filter unit, the digital filtering unit is connected with the output end of the comparator, whole for being filtered to output signal
Shape.
5. infrared receiving circuit according to claim 1, it is characterised in that the main receiver module and photodiode
First switch is connected between current output terminal, the first switch default conditions are off-state；The signal detection module
Second switch is connected with and the current output terminal of photodiode between, the second switch default conditions are conducting state.
6. infrared receiving circuit according to claim 5, it is characterised in that the enable letter of the signal detection module output
Number for controlling the first switch to turn on, while controlling the second switch to disconnect.
7. infrared receiving circuit according to claim 5, it is characterised in that also include：Digital module, the digital module
It is connected with main receiver module, the data signal for receiving the main receiver module output.
8. infrared receiving circuit according to claim 7, it is characterised in that the digital module is additionally operable to receiving number
After word signal, reset signal is sent, the reset signal is used to control the first switch and second switch to recover to acquiescence
State.
9. infrared receiving circuit according to claim 1, it is characterised in that the main receiver module includes：Current Voltage
Converting unit, amplifying unit and AD conversion unit；The Current Voltage converting unit is connected to the electricity of the photodiode
Stream output end, for the current signal that the photodiode is exported to be amplified and is converted to voltage signal；The amplifying unit
The Current Voltage converting unit is connected to, the voltage signal for the Current Voltage converting unit to be exported amplifies；It is described
AD conversion unit is connected with the amplifying unit, for the voltage signal that the amplifying unit is exported to be converted into data signal
And export.
10. infrared receiving circuit according to claim 1, it is characterised in that also include：Dark current suppression module, it is described
Dark current suppression module is connected with the current output terminal of the photodiode, for removing the dark current in output current.
11. infrared receiving circuits according to claim 10, it is characterised in that the dark current suppression module includes：Electricity
Stream mirror unit, operational amplifier and low-pass filter circuit；The current lens unit is made up of two nmos pass transistors, the electric current
The input of mirror unit is connected to power end by PMOS transistor, and the output end of the current lens unit is connected to the pole of photoelectricity two
The current output terminal of pipe；The output end of the operational amplifier is connected to the grid of the PMOS transistor by not gate, described
One input of operational amplifier is connected to common-mode voltage end, and another input is connected to photoelectricity by the low-pass filter circuit
The current output terminal of diode.
12. infrared receiving circuits according to claim 11, it is characterised in that the low-pass filter circuit includes：Electric capacity
And resistance；Described resistance one end is connected to the current output terminal of photodiode, and the other end is connected to operational amplifier and described
Electric capacity；Described electric capacity one end is connected to the resistance, other end ground connection.
13. infrared receiving circuits according to claim 11, it is characterised in that the operational amplifier is operated in negative-feedback
State.
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|---|---|---|---|
| CN201710014195.9A CN106781424A (en) | 2017-01-09 | 2017-01-09 | Infrared receiving circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710014195.9A CN106781424A (en) | 2017-01-09 | 2017-01-09 | Infrared receiving circuit |
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| CN109523739A (en) * | 2017-09-19 | 2019-03-26 | 艾尔默斯半导体股份公司 | Circuit device for smoke sensor device |
| CN109990895A (en) * | 2019-05-07 | 2019-07-09 | 珠海市一微半导体有限公司 | A kind of infrared receiving system and SOC chip inhibiting ambient light interference |
| CN110009898A (en) * | 2019-04-29 | 2019-07-12 | 深圳市嘉昱机电有限公司 | A kind of infrared receiving device and infrared receiving system |
| CN110091360A (en) * | 2019-05-07 | 2019-08-06 | 珠海市一微半导体有限公司 | A kind of steep cliff detection device, mobile robot and detection control method |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08181348A (en) * | 1994-12-22 | 1996-07-12 | Copal Co Ltd | Photoelectric converter |
| US6407840B1 (en) * | 1998-06-19 | 2002-06-18 | Huang Shien-Te | Power-saving infrared-detecting receiving system |
| EP1648101A1 (en) * | 2004-10-15 | 2006-04-19 | Infineon Technologies Fiber Optics GmbH | Receiving circuit for an optical receiving apparatus |
| JP2006222495A (en) * | 2005-02-08 | 2006-08-24 | Olympus Corp | Photocurrent detection circuit |
| US20060273243A1 (en) * | 2005-06-02 | 2006-12-07 | Kabushiki Kaisha Toshiba | Optical signal receiving circuit |
| US20070023614A1 (en) * | 2005-08-01 | 2007-02-01 | Samsung Electro-Mechanics Co., Ltd. | Cmos image sensor having dark current compensation function |
| CN1945240A (en) * | 2005-10-03 | 2007-04-11 | 美国凹凸微系有限公司 | Light detecting device |
| US20070120044A1 (en) * | 2005-11-30 | 2007-05-31 | Yuzo Shimizu | Light receiving device for reducing influence of dark current and stray light |
| US20110192958A1 (en) * | 2010-02-11 | 2011-08-11 | Chun-Hao Huang | Photosensor device with dark current cancellation |
| CN103323111A (en) * | 2013-06-07 | 2013-09-25 | 华南理工大学 | Pre-amplification and measuring range automatic switching circuit for light intensity detection |
| CN103679856A (en) * | 2012-08-31 | 2014-03-26 | 深圳光启创新技术有限公司 | Power supply control module and intelligent photon lock |
| CN104748864A (en) * | 2015-03-31 | 2015-07-01 | 中国科学院上海技术物理研究所 | CMOS (complementary metal-oxide semiconductor) infrared detector reading-out circuit capable of realizing element-by-element dark current suppression |
| CN105433935A (en) * | 2015-12-29 | 2016-03-30 | 深圳贝特莱电子科技股份有限公司 | Integrated chip for detecting human body heart rate in photoelectric mode |
| CN205453670U (en) * | 2016-02-26 | 2016-08-10 | 深圳市乐夷微电子有限公司 | Infrared receiving circuit and infrared receiver |
| CN206370152U (en) * | 2017-01-09 | 2017-08-01 | 上海胤祺集成电路有限公司 | Infrared receiving circuit |
-
2017
- 2017-01-09 CN CN201710014195.9A patent/CN106781424A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08181348A (en) * | 1994-12-22 | 1996-07-12 | Copal Co Ltd | Photoelectric converter |
| US6407840B1 (en) * | 1998-06-19 | 2002-06-18 | Huang Shien-Te | Power-saving infrared-detecting receiving system |
| EP1648101A1 (en) * | 2004-10-15 | 2006-04-19 | Infineon Technologies Fiber Optics GmbH | Receiving circuit for an optical receiving apparatus |
| JP2006222495A (en) * | 2005-02-08 | 2006-08-24 | Olympus Corp | Photocurrent detection circuit |
| US20060273243A1 (en) * | 2005-06-02 | 2006-12-07 | Kabushiki Kaisha Toshiba | Optical signal receiving circuit |
| US20070023614A1 (en) * | 2005-08-01 | 2007-02-01 | Samsung Electro-Mechanics Co., Ltd. | Cmos image sensor having dark current compensation function |
| CN1945240A (en) * | 2005-10-03 | 2007-04-11 | 美国凹凸微系有限公司 | Light detecting device |
| US20070120044A1 (en) * | 2005-11-30 | 2007-05-31 | Yuzo Shimizu | Light receiving device for reducing influence of dark current and stray light |
| US20110192958A1 (en) * | 2010-02-11 | 2011-08-11 | Chun-Hao Huang | Photosensor device with dark current cancellation |
| CN103679856A (en) * | 2012-08-31 | 2014-03-26 | 深圳光启创新技术有限公司 | Power supply control module and intelligent photon lock |
| CN103323111A (en) * | 2013-06-07 | 2013-09-25 | 华南理工大学 | Pre-amplification and measuring range automatic switching circuit for light intensity detection |
| CN104748864A (en) * | 2015-03-31 | 2015-07-01 | 中国科学院上海技术物理研究所 | CMOS (complementary metal-oxide semiconductor) infrared detector reading-out circuit capable of realizing element-by-element dark current suppression |
| CN105433935A (en) * | 2015-12-29 | 2016-03-30 | 深圳贝特莱电子科技股份有限公司 | Integrated chip for detecting human body heart rate in photoelectric mode |
| CN205453670U (en) * | 2016-02-26 | 2016-08-10 | 深圳市乐夷微电子有限公司 | Infrared receiving circuit and infrared receiver |
| CN206370152U (en) * | 2017-01-09 | 2017-08-01 | 上海胤祺集成电路有限公司 | Infrared receiving circuit |
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| CN110009898A (en) * | 2019-04-29 | 2019-07-12 | 深圳市嘉昱机电有限公司 | A kind of infrared receiving device and infrared receiving system |
| CN110009898B (en) * | 2019-04-29 | 2024-02-06 | 深圳市嘉昱机电有限公司 | Infrared receiving device and infrared receiving system |
| CN109990895A (en) * | 2019-05-07 | 2019-07-09 | 珠海市一微半导体有限公司 | A kind of infrared receiving system and SOC chip inhibiting ambient light interference |
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