CN103473899B - The position encoded circuit of a kind of infrared signal amplifier stage - Google Patents
The position encoded circuit of a kind of infrared signal amplifier stage Download PDFInfo
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- CN103473899B CN103473899B CN201310430026.5A CN201310430026A CN103473899B CN 103473899 B CN103473899 B CN 103473899B CN 201310430026 A CN201310430026 A CN 201310430026A CN 103473899 B CN103473899 B CN 103473899B
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- 230000003321 amplification Effects 0.000 claims abstract description 61
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 61
- 230000006698 induction Effects 0.000 claims abstract description 24
- 230000011664 signaling Effects 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims abstract description 5
- 230000007704 transition Effects 0.000 claims abstract description 4
- 230000005669 field effect Effects 0.000 claims description 12
- 230000000903 blocking effect Effects 0.000 claims description 8
- 230000008054 signal transmission Effects 0.000 abstract description 2
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Abstract
The invention discloses the position encoded circuit of a kind of infrared signal amplifier stage, the position encoded circuit of described infrared signal amplifier stage comprises: infrared induction and signal amplification circuit, infrared signal coding circuit and power circuit, described power circuit provides 5V power supply for described infrared induction and signal amplification circuit, and described power circuit provides 12V power supply for described infrared signal coding circuit and described infrared signal transmission circuit; Described infrared induction and signal amplification circuit induction infrared signal, transfer in described infrared signal coding circuit after amplifying process; Described infrared signal coding circuit receives the infrared signal after amplifying and is become the position signalling of coding by inner coder transitions and exported.This circuit provides stable position signalling, avoid extraneous interference and unnecessary economic loss.
Description
Technical field
The present invention relates to position encoded circuit, particularly the position encoded circuit of a kind of infrared signal amplifier stage.
Background technology
Alarm is a kind of for preventing or preventing certain event that the consequence caused occurs, and reminds or warns people should take certain electronic product of taking action with forms such as sound, light, air pressure.Alarm is divided into mechanical alarm device and electronic alarm at first.Along with the progress of science and technology, applying maximum in prior art is infra-red alarm, and infra-red alarm forms warning system by alarm host machine and infrared eye.Invade once detect someone, infra-red alarm is wirelessly transmitted to alarm host machine position signalling immediately, after main frame receives position signalling, can send the functions such as warning.
Inventor is realizing in process of the present invention, finds at least there is following shortcoming and defect in prior art:
Position encoded circuit structure in existing infra-red alarm circuit is complicated, and the position signalling exported is unstable, occur that alarm host machine does not receive the situation of position signalling sometimes, delay the opportunity dealt with an urgent situation, cause unnecessary economic loss.
Summary of the invention
The invention provides the position encoded circuit of a kind of infrared signal amplifier stage, this position encoded circuit structure is simple, and the position signalling of output is stablized, and decreases economic loss, described below:
The position encoded circuit of a kind of infrared signal amplifier stage, the position encoded circuit of described infrared signal amplifier stage comprises: infrared induction and signal amplification circuit, infrared signal coding circuit and power circuit,
Described power circuit provides 5V power supply for described infrared induction and signal amplification circuit, and described power circuit provides 12V power supply for described infrared signal coding circuit; Described infrared induction and signal amplification circuit induction infrared signal, transfer in described infrared signal coding circuit after amplifying process; Described infrared signal coding circuit receives the infrared signal after amplifying becomes coding position signalling by inner coder transitions, and exports.
Described infrared induction and signal amplification circuit comprise: infrared inductor, the external biasing circuit be made up of the first resistance, the second resistance, the 3rd resistance and the 3rd electric capacity of described infrared inductor, described first resistance connects the first electric capacity, the second electric capacity and 5V power supply respectively, the power input of 5V plant-grid connection signal amplification chip, the bias current of described signal amplification chip arranges end by the 4th resistance eutral grounding; The in-phase input end of described signal amplification chip receives by the 5th resistance the infrared signal that described infrared inductor senses; The inverting input of described signal amplification chip connects the 6th resistance, the 4th electric capacity and the 7th resistance respectively, and described 7th resistance is by the 5th capacity earth; Described 6th resistance connects the output terminal of described signal amplification chip, first of described signal amplification chip triggers blocking time adjustable side connects the 7th electric capacity positive ends by Timing resistance, second triggers the positive ends that blocking time regulates the 7th electric capacity described in termination, described 7th capacity earth; The output delay time of described signal amplification chip regulates termination the 8th electric capacity, and launch time, adjustable side connect described 8th electric capacity by the 8th resistance; The output pin of described signal amplification chip exports the infrared signal after amplifying.
Described infrared signal coding circuit comprises: coding chip, and the power end of described coding chip connects the 9th resistance and field effect transistor respectively, and described field effect transistor connects 12V power supply, and described 9th resistance connects the anode of diode, the plus earth of described diode; Described field effect transistor connects the tenth resistance and the 11 resistance successively, and described 11 resistance connects the collector of the first triode, the infrared signal after the base stage access amplification of described first triode; First signal pins of described coding chip, second signal pins, tribute signal pin are connected the first button, the second button, the 3rd button and the 4th button successively with the 4th signal pins, and described first button, described second button, described 3rd button and the described 4th press the emitter of the first triode described in keyed jointing; It is described that first signal pins connects the 12 resistance, described second signal pins connects the 13 resistance, described tribute signal pin connects the 14 resistance, described 4th signal pins connects the 15 resistance, described 12 resistance, described 13 resistance, described 14 resistance and described 15 resistance eutral grounding; The position signalling of the output pin output encoder of described coding chip.
The beneficial effect of technical scheme provided by the invention is: the position encoded circuit structure of this infrared signal amplifier stage is simple, the output of position signalling is achieved by infrared induction and signal amplification circuit, infrared signal coding circuit, this circuit provides stable position signalling, avoid extraneous interference and unnecessary economic loss.
Accompanying drawing explanation
Fig. 1 is the structural representation of the position encoded circuit of infrared signal amplifier stage;
Fig. 2 is the circuit theory diagrams of infrared induction and signal amplification circuit;
Fig. 3 is the circuit theory diagrams of infrared signal coding circuit.
In accompanying drawing, being listed as follows of each parts:
1: infrared induction and signal amplification circuit; 2: infrared signal coding circuit;
3: power circuit; DO-DATA: position encoded;
Q5: infrared inductor; R12: the first resistance;
R14: the second resistance; R15: the three resistance;
C6: the first electric capacity; C7: the second electric capacity;
C8: the three electric capacity; U2: signal amplification chip;
IB: bias current arranges end; R16: the four resistance;
U2: signal amplification chip; 1IN+: in-phase input end;
R20: the five resistance; 1IN-: inverting input;
R25: the six resistance; C11: the four electric capacity;
R18: the seven resistance; C12: the five electric capacity;
1OUT: the output terminal of signal amplification chip U2; RESET: resetting pin;
C15: the six electric capacity; RR2: the first triggers blocking time adjustable side;
TR21: Timing resistance; RC2: the second triggers blocking time adjustable side;
C17: the seven electric capacity; RC1: output delay time adjustable side;
C16: the eight electric capacity; RR1: launch time adjustable side;
R24: the eight resistance; A: can repeated trigger control end;
VO: output pin; OUT1: the infrared signal after amplification;
U1: coding chip; R1: the nine resistance;
Q6: field effect transistor; LED: diode;
R8: the ten resistance; R7: the ten one resistance;
Q4: the first triode; D0: the first signal pins;
D1: second signal pins; D2: the tribute signal pin;
D3: the four signal pins; S1: the first button;
S2: the second button; S3: the three button;
S4: the four button; R6: the ten two resistance;
R5: the ten three resistance; R4: the ten four resistance;
R3: the ten five resistance; DOUT: output pin.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
In order to simplify circuit structure, improving the stability of position signalling, reducing economic loss, embodiments providing the position encoded circuit of a kind of infrared signal amplifier stage, see Fig. 1, described below:
The position encoded circuit of this infrared signal amplifier stage comprises: infrared induction and signal amplification circuit 1, infrared signal coding circuit 2 and power circuit 3, power circuit 3 provides 5V power supply for infrared induction and signal amplification circuit 1, and power circuit 3 provides 12V power supply for infrared signal coding circuit 2; Infrared induction and signal amplification circuit 1 respond to infrared signal, transfer in infrared signal coding circuit 2 after amplifying process; Infrared signal coding circuit 2 receives the infrared signal after amplifying and is become the position signalling of coding by inner coder transitions and exported.
See Fig. 2, infrared induction and signal amplification circuit 1 comprise: infrared inductor Q5, the external biasing circuit be made up of the first resistance R12, the second resistance R14, the 3rd resistance R15 and the 3rd electric capacity C8 of infrared inductor Q5, first resistance R12 meets the first electric capacity C6, the second electric capacity C7 and 5V power vd D respectively, 5V power vd D accesses the power input VC of signal amplification chip U2, and the bias current of signal amplification chip U2 arranges end IB by the 4th resistance R16 ground connection; The infrared signal that the in-phase input end 1IN+ of signal amplification chip U2 is sensed by the 5th resistance R20 receiving infrared-ray inductor Q5; The inverting input 1IN-of signal amplification chip U2 meets the 6th resistance R25, the 4th electric capacity C11 and the 7th resistance R18 respectively, 7th resistance R18 is by the 5th electric capacity C12 ground connection (wherein, the 4th electric capacity C11, the 7th resistance R18 and the 5th electric capacity C12 provide stable voltage for signal amplification chip U2); 6th resistance R25 meets the output terminal 1OUT(of signal amplification chip U2 wherein, the output terminal 1OUT of signal amplification chip U2 through the 6th resistance R25 for inverting input provides feedback voltage, more stable to ensure exporting amplifying signal), the resetting pin RESET of signal amplification chip U2 is by the 6th electric capacity C15 ground connection; First of signal amplification chip U2 triggers blocking time adjustable side RR2 meets the 7th electric capacity C17 positive ends by Timing resistance TR21, and second triggers the positive ends that blocking time adjustable side RC2 meets the 7th electric capacity C17, the 7th electric capacity C17 ground connection; The output delay time adjustable side RC1 of signal amplification chip U2 meets the 8th electric capacity C16, and launch time, adjustable side RR1 met the 8th electric capacity C16 by the 8th resistance R24; Wherein, Timing resistance TR21, the 7th electric capacity C17, the 8th resistance R24 and the 8th electric capacity C16 are regulating time constant; Signal amplification chip U2 can repeated trigger control end A when for " 1 ", be allow repeated trigger, for time " 0 " being not reproducible triggering; The output pin VO of signal amplification chip U2 exports the infrared signal after amplifying, that is, the infrared signal OUT1 after amplification is transported in infrared signal coding circuit 2 by output pin VO, and all the other pins are unsettled.
Wherein, first electric capacity C6 and the second electric capacity C7 is power filtering capacitor, the infrared signal sensed is input to in-phase input end 1IN+(i.e. 14 pin of signal amplification chip U2 through the 5th resistance R20), inverting input 1IN-(i.e. 15 pin of signal amplification chip U2) by the 4th electric capacity C11, 7th resistance R18, 5th electric capacity C12 provides stable reference voltage for signal amplification chip U2, output terminal IOUT(i.e. 16 pin of signal amplification chip U2) through the 6th resistance R25 for inverting input provides feedback voltage, more stable to ensure exporting amplifying signal, 11 pin of signal amplification chip U2 are that end is forbidden in triggering, C14 is filter capacitor, bias current arranges end IB(i.e. 10 pin) be connected to the ground by the 4th resistance R16.
See Fig. 3, infrared signal coding circuit 2 comprises: coding chip U1, and the power end VCC of coding chip U1 meets the 9th resistance R1 and field effect transistor Q6 respectively, and field effect transistor Q6 connects 12V power supply, 9th resistance R1 connects the anode of diode (LED), the plus earth of diode (LED); Field effect transistor Q6 connects the tenth resistance R8 and the 11 resistance R7 successively, and the 11 resistance R7 connects the collector of the first triode Q4, the infrared signal OUT1 after the base stage access amplification of the first triode Q4; First signal pins D0, second signal pins D1, the tribute signal pin D2 of coding chip U1 are connected the first button S1, the second button S2, the 3rd button S3 and the 4th button S4 successively with the 4th signal pins D3, and the first button S1, the second button S2, the 3rd button S3 and the 4th button S4 connect the emitter of the first triode Q4; First signal pins D0 meets the 12 resistance R6, second signal pins D1 meets the 13 resistance R5, tribute signal pin D2 meets the 14 resistance R4,4th signal pins D3 meets the 15 resistance R3, the 12 resistance R6, the 13 resistance R5, the 14 resistance R4 and the 15 resistance R3 ground connection; The position signalling DO-DATA of the output pin DOUT output encoder of coding chip U1.
Wherein, the Main Function of infrared signal coding circuit 2 is to determine the concrete orientation of reporting to the police, alert condition where is had to occur, realize by encoding to signal, coding coding chip SC2262 has come, wherein i.e. 10 pin of the 4th signal pins D3(), tribute signal pin D2(i.e. 11 pin), second signal pins D1(i.e. 12 pin), i.e. 13 pin of first signal pins D0() be position signal, high level is effective, number of combinations is 4x3x2x1, by pressing the first button S1, second button S2, 3rd button S3 and the 4th button S4 can form different codings, this different coding is exactly the position encoded of place of reporting to the police.
The principle of work of this infrared signal coding circuit 2 is as follows: BT is the power unit of whole circuit, and for whole infrared signal coding circuit 2 is powered, C1 is power filtering capacitor, and Q6 is field effect transistor, controls power supply and powers to coding chip SC2262 and stop power supply.Tenth resistance R8 and the 11 resistance R7 is the divider resistance of the first triode Q4, when upper level infrared induction signal OUT1 inputs to the base stage of Q4 after amplifying, control Q4 conducting, then Q6 conducting, power supply BT is that SC2262 powers through 18 pin, coding chip SC2262 starts working, position button---the button short circuit will encoded with U-LINK judges that who is pressed by advance preset, become different coded messages through the coding of coding chip SC2262 to export via 17 pin DOUT, R2 is coding He Ne laser resistance.In this circuit, R3, R4, R5, R6 of coding chip SC2262 is pull down resistor, and pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7 are unsettled.Pass through the positional information of coding via output pin DOUT(i.e. 17 pin) export.
Wherein, when the position encoded circuit of infrared ray amplified signal level and the supporting application of infrared signal transmission circuit of the prior art, a complete infra-red code alarming wireless transmitter can also be formed, the position encoded circuit structure of this infrared signal amplifier stage is simple, by infrared induction and signal amplification circuit, infrared signal coding circuit outgoing position signal, this circuit provides stable position signalling, avoid extraneous interference and unnecessary economic loss.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. the position encoded circuit of infrared signal amplifier stage, is characterized in that, the position encoded circuit of described infrared signal amplifier stage comprises: infrared induction and signal amplification circuit, infrared signal coding circuit and power circuit,
Described power circuit provides 5V power supply for described infrared induction and signal amplification circuit, and described power circuit provides 12V power supply for described infrared signal coding circuit; Described infrared induction and signal amplification circuit induction infrared signal, transfer in described infrared signal coding circuit after amplifying process; Described infrared signal coding circuit receives the infrared signal after amplifying becomes coding position signalling by inner coder transitions, and exports;
Wherein, described infrared induction and signal amplification circuit comprise: infrared inductor, the external biasing circuit be made up of the first resistance, the second resistance, the 3rd resistance and the 3rd electric capacity of described infrared inductor, described first resistance connects the first electric capacity, the second electric capacity and 5V power supply respectively, the power input of 5V plant-grid connection signal amplification chip, the bias current of described signal amplification chip arranges end by the 4th resistance eutral grounding; The in-phase input end of described signal amplification chip receives by the 5th resistance the infrared signal that described infrared inductor senses; The inverting input of described signal amplification chip connects the 6th resistance, the 4th electric capacity and the 7th resistance respectively, and described 7th resistance is by the 5th capacity earth; Described 6th resistance connects the output terminal of described signal amplification chip, first of described signal amplification chip triggers blocking time adjustable side connects the 7th electric capacity positive ends by Timing resistance, second triggers the positive ends that blocking time regulates the 7th electric capacity described in termination, described 7th capacity earth; The output delay time of described signal amplification chip regulates termination the 8th electric capacity, and launch time, adjustable side connect described 8th electric capacity by the 8th resistance; The output pin of described signal amplification chip exports the infrared signal after amplifying; The model of described signal amplification chip is LP0001;
Wherein, described infrared signal coding circuit comprises: coding chip, and the power end of described coding chip connects the 9th resistance and field effect transistor respectively, and described field effect transistor connects 12V power supply, and described 9th resistance connects the anode of diode, the plus earth of described diode; Described field effect transistor connects the tenth resistance and the 11 resistance successively, and described 11 resistance connects the collector of the first triode, the infrared signal after the base stage access amplification of described first triode; First signal pins of described coding chip, second signal pins, tribute signal pin are connected the first button, the second button, the 3rd button and the 4th button successively with the 4th signal pins, and described first button, described second button, described 3rd button and the described 4th press the emitter of the first triode described in keyed jointing; It is described that first signal pins connects the 12 resistance, described second signal pins connects the 13 resistance, described tribute signal pin connects the 14 resistance, described 4th signal pins connects the 15 resistance, described 12 resistance, described 13 resistance, described 14 resistance and described 15 resistance eutral grounding; The position signalling of the output pin output encoder of described coding chip; Wherein, the principle of work of described infrared signal coding circuit is: described tenth resistance and described 11 resistance are the divider resistance of the first triode, when upper level infrared induction signal inputs to the base stage of the first triode after amplifying, control the first triode ON, then field effect transistor conducting, coding chip is started working, position button---the button short circuit will encoded with U-LINK judges that who is pressed by advance preset, and the coding through coding chip becomes different coded message output.
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| CN201310430026.5A CN103473899B (en) | 2013-09-18 | 2013-09-18 | The position encoded circuit of a kind of infrared signal amplifier stage |
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| CN201310430026.5A CN103473899B (en) | 2013-09-18 | 2013-09-18 | The position encoded circuit of a kind of infrared signal amplifier stage |
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| CN103473899A CN103473899A (en) | 2013-12-25 |
| CN103473899B true CN103473899B (en) | 2016-02-10 |
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|---|---|---|---|---|
| US4786831A (en) * | 1984-12-17 | 1988-11-22 | Hughes Aircraft Company | Integrating capacitively coupled transimpedance amplifier |
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