CN105979654A - Differential amplification circuit-based signal processing system for optical control LED - Google Patents
Differential amplification circuit-based signal processing system for optical control LED Download PDFInfo
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- CN105979654A CN105979654A CN201610460388.2A CN201610460388A CN105979654A CN 105979654 A CN105979654 A CN 105979654A CN 201610460388 A CN201610460388 A CN 201610460388A CN 105979654 A CN105979654 A CN 105979654A
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- pole
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- negative pole
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/45—Differential amplifiers
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Abstract
The invention discloses a differential amplification circuit-based signal processing system for an optical control LED. The differential amplification circuit-based signal processing system is characterized by mainly comprising a processing chip U, a triode VT1, a diode D2, a diode D3, a low-pass filter circuit, a differential amplification circuit and a signal emission conditioning circuit, wherein the differential amplification circuit is connected between the low-pass filter circuit and a VINP pin of the processing chip U in series; and the signal emission conditioning circuit is connected with an emitter of the triode VT1 and the processing chip U separately. According to the differential amplification circuit-based signal processing system for the optical control LED, a harmonic wave, caused by an external interference electric wave, of an input signal can be eliminated or inhibited; the bandwidth of an output signal can also be adjusted; and the output signal is consistent with an input collection signal, so that the signal processing accuracy of the signal processing system is ensured; and the on and off control accuracy of an optical control LED control system on an LED lamp is effectively ensured.
Description
Technical field
The present invention relates to electronic applications, specifically, be that a kind of light-operated LED based on differential amplifier circuit is used
Signal processing system.
Background technology
At present, due to LED have that energy consumption is low, the feature such as length in service life and safety and environmental protection, it is
Become one of main product of people's life lighting.People's many employings acoustic control or light-operated control system in life
System realizes the open and close to LED.Light-operated LED control system can use according to LED because of it
The brightness of environment controls the open and close of LED, and can effectively meet people to LED energy-conservation
The requirement of aspect, and enjoy the favor of people.But, the signal processing of existing light-operated LED control system
Luminance signal is easily processed inaccurate by extraneous Electromagnetic Interference by system, causes the light-operated control system can not root
Intensity of illumination according to environment controls the open and close of LED accurately, thus cannot well meet people
Requirement at energy-conservation aspect.
Can the signal processing system of process accurate to luminance signal be the task of top priority therefore it provides a kind of.
Summary of the invention
The signal processing system that it is an object of the invention to overcome light-operated LED control system of the prior art is easy
By extraneous Electromagnetic Interference, luminance signal is processed inaccurate defect, it is provided that one put based on difference
The light-operated LED signal processing system of big circuit.
The present invention is achieved through the following technical solutions: a kind of light-operated LED based on differential amplifier circuit is believed
Number processing system, mainly by processing chip U, audion VT1, N pole and the FDBK pipe processing chip U
The diode D2, P that foot is connected, P pole is connected with the COM pin processing chip U after resistance R6
Pole is connected with the VNEG pin processing chip U after resistance R7, the base stage of N pole and audion VT1
The diode D3 being connected, the low-pass filter circuit being connected with the GNEG pin processing chip U, string
It is connected on the differential amplifier circuit between low-pass filter circuit and the VINP pin processing chip U, and difference
The signal being connected with audion VT1 emitter stage and process chip U launches modulate circuit composition；Described three
The colelctor electrode of pole pipe VT1 is connected with the FDBK pin processing chip U.
Described differential amplifier circuit is by amplifier P3, amplifier P4, audion VT2, and positive pole is through resistance R13
Afterwards the positive pole with amplifier P3 be connected, negative pole as differential amplifier circuit input and with low-pass filtering electricity
Polar capacitor C10, the N pole that road is connected is connected with the base stage of audion VT2, P pole is sequentially through inductance L
The diode D5 that negative pole with amplifier P3 is connected afterwards, with the collection of audion VT2 after positive electrode resistance R15
The polar capacitor C11 that electrode is connected, negative pole negative pole with amplifier P3 after resistance R14 is connected, just
Pole is connected with the emitter stage of audion VT3 after resistance R resistance R16, negative pole and amplifier P4 just
The polar capacitor C12 that pole is connected, positive pole positive pole with amplifier P4 after resistance R17 is connected, negative pole
The polar capacitor C13 of ground connection, and P pole negative pole with amplifier P4 after resistance R18 is connected, N pole
The diode D6 composition that outfan with amplifier P4 is connected after resistance R19；Described polar capacitor C12
Positive pole be connected with the outfan of amplifier P3；The minus earth of described polar capacitor C11；Described two poles
The P pole ground connection of pipe D6；The outfan of described amplifier P4 as differential amplifier circuit outfan and with process
The VINP pin of chip U is connected.
Described low-pass filter circuit is by amplifier P1, and positive pole is connected with the positive pole of amplifier P1, negative pole conduct
The polar capacitor C1 of the input of low-pass filter circuit, one end is connected with the negative pole of polar capacitor C1, separately
The resistance R1 of one end ground connection, positive pole negative pole with amplifier P1 after resistance R2 is connected, minus earth
Polar capacitor C2, positive pole positive pole with amplifier P 1 after resistance R3 is connected, negative pole and amplifier P1
Polar capacitor C3, the P pole that is connected of outfan be connected with the positive pole of amplifier P1, N pole is through resistance
The diode D1 that after R4, negative pole with polar capacitor C3 is connected, and the output of negative pole and amplifier P1
The polar capacitor C4 that end is connected, positive pole is connected with the GNEG pin processing chip U after resistance R5
Composition；The outfan of described amplifier P1 is connected with the negative pole of polar capacitor C10.
Described signal launches modulate circuit by field effect transistor MOS, amplifier P2, N pole and field effect transistor MOS
Drain electrode be connected, P pole after resistance R8 with the diode that is connected of VPOS pin processing chip U
D4, negative pole outfan with amplifier P2 after resistance R11 is connected, positive pole is imitated with field after resistance R9
Should the polar capacitor C5 that is connected of the drain electrode of pipe MOS, one end is connected with the source electrode of field effect transistor MOS,
The adjustable resistance R10 that the other end is connected with the outfan of amplifier P2, negative pole and field effect transistor MOS
The polar capacitor C6 that source electrode is connected, positive pole is connected with the positive pole of amplifier P2, positive pole and audion VT1
The polar capacitor C7 that emitter stage is connected, negative pole negative pole with amplifier P2 after resistance R12 is connected,
Positive pole is connected with the outfan of amplifier P2, negative pole launches the polarity of outfan of modulate circuit as signal
Electric capacity C8, and positive pole is connected with the outfan of amplifier P2, the negative pole phase of negative pole and polar capacitor C8
The polar capacitor C9 composition connected；The minus earth of described polar capacitor C7；Described field effect transistor MOS
Grid with process chip U VOUT pin be connected.
For the practical effect of the present invention, described process chip U the most preferentially uses the integrated chip of AD603
Realize.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) input signal can be produced by the present invention because of external interference electric wave Harmonics elimination or suppression；And
The bandwidth of output signal can also be adjusted by the present invention, makes output signal consistent with the collection signal of input,
Ensure that the present invention accuracy to signal processing, effectively ensure that light-operated LED control system pair
The accuracy opening and closing control of LED.
(2) null offset of common-mode signal can be suppressed by the present invention, and can also carry out difference mode signal
Amplify, thus improve the present invention accuracy to signal processing.
(3) the process chip of the present invention have employed the integrated chip of AD603 and realizes, this chip performance stable with
External circuit combines the accuracy effectively raising the present invention to signal processing.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of the differential amplifier circuit of the present invention.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing thereof, the present invention is described in further detail, but the enforcement of the present invention
Mode is not limited to this.
Embodiment
As it is shown in figure 1, the present invention is mainly by processing chip U, audion VT1, N pole and process chip U
FDBK pin be connected, P pole after resistance R6 with process chip U COM pin be connected two
Pole pipe D2, P pole is connected with the VNEG pin processing chip U after resistance R7, N pole and audion
The diode D3 that the base stage of VT1 is connected, the low pass filtered being connected with the GNEG pin processing chip U
Wave circuit, is serially connected in the differential amplifier circuit between low-pass filter circuit and the VINP pin processing chip U,
And the signal transmitting modulate circuit group being connected with audion VT1 emitter stage and process chip U respectively
Become；The colelctor electrode of described audion VT1 is connected with the FDBK pin processing chip U.
Wherein, described low-pass filter circuit is by amplifier P1, resistance R1, resistance R2, resistance R3, resistance
R4, resistance R5, polar capacitor C1, polar capacitor C2, polar capacitor C3, polar capacitor C4, and
Diode D1 forms.
During connection, the positive pole of polar capacitor C1 is connected with the positive pole of amplifier P1, its negative pole is as low pass
The input of filter circuit is also connected with luminance sensor.One end of resistance R1 is negative with polar capacitor C1's
Pole is connected, its other end ground connection.The positive pole of polar capacitor C2 after resistance R2 with the negative pole of amplifier P1
Be connected, its minus earth.The positive pole of polar capacitor C3 after resistance R3 with the positive pole phase of amplifier P 1
Connect, its negative pole is connected with the outfan of amplifier P1.
Meanwhile, the P pole of diode D1 is connected with the positive pole of amplifier P1, its N pole is after resistance R4
It is connected with the negative pole of polar capacitor C3.The negative pole of polar capacitor C4 is connected with the outfan of amplifier P1,
Its positive pole is connected with the GNEG pin processing chip U after resistance R5.The output of described amplifier P1
End is connected with the negative pole of polar capacitor C10.
Further, described signal launches modulate circuit by field effect transistor MOS, amplifier P2, resistance R8,
Resistance R9, adjustable resistance R10, resistance R11, resistance R12, polar capacitor C5, polar capacitor C6,
Polar capacitor C7, polar capacitor C8, polar capacitor C9, diode D4 form.
During connection, the N pole of diode D4 is connected with the drain electrode of field effect transistor MOS, its P pole is through resistance
It is connected with the VPOS pin processing chip U after R8.The negative pole of polar capacitor C5 after resistance R11 with
The outfan of amplifier P2 is connected, the drain electrode with field effect transistor MOS after resistance R9 of its positive pole is connected.
One end of adjustable resistance R10 is connected with the source electrode of field effect transistor MOS, its other end and amplifier P2
Outfan is connected.
Meanwhile, the negative pole of polar capacitor C6 be connected with the source electrode of field effect transistor MOS, its positive pole and amplification
The positive pole of device P2 is connected.The positive pole of polar capacitor C7 is connected with the emitter stage of audion VT1, it is born
Pole negative pole with amplifier P2 after resistance R12 is connected.The positive pole of polar capacitor C8 and amplifier P2
Outfan be connected, its negative pole as signal launch modulate circuit outfan and with light-operated LED controller
It is connected.The positive pole of polar capacitor C9 is connected with the outfan of amplifier P2, its negative pole and polar capacitor
The negative pole of C8 is connected.The minus earth of described polar capacitor C7；The grid of described field effect transistor MOS with
The VOUT pin processing chip U is connected.
As in figure 2 it is shown, described differential amplifier circuit is by amplifier P3, amplifier P4, audion VT2, electricity
Resistance R13, resistance R14, resistance R15, resistance R16, resistance R17, resistance R18, resistance R19, pole
Property electric capacity C10, polar capacitor C11, polar capacitor C12, polar capacitor C13, diode D5, two poles
Pipe D6 and inductance L composition.
During connection, the positive pole of polar capacitor C10 positive pole with amplifier P3 after resistance R13 is connected, it
Negative pole as the input of differential amplifier circuit and is connected with low-pass filter circuit.The N pole of diode D5
Be connected with the base stage of audion VT2, its P pole sequentially after inductance L negative pole with amplifier P3 be connected
Connect.After positive electrode resistance R15 of polar capacitor C11 the colelctor electrode with audion VT2 be connected, its negative pole warp
After resistance R14, the negative pole with amplifier P3 is connected.
Meanwhile, the positive pole of polar capacitor C12 after resistance R resistance R16 with the emitter stage phase of audion VT3
Connect, its negative pole is connected with the positive pole of amplifier P4.The positive pole of polar capacitor C13 after resistance R17 with
The positive pole of amplifier P4 is connected, its minus earth.The P pole of diode D6 after resistance R18 with amplification
The negative pole of device P4 is connected, its N pole outfan with amplifier P4 after resistance R19 is connected.
The positive pole of described polar capacitor C12 is connected with the outfan of amplifier P3；Described polar capacitor C11
Minus earth；The P pole ground connection of described diode D6；The outfan of described amplifier P4 is put as difference
Big circuit output end is also connected with the VINP pin processing chip U.
During enforcement, Harmonics elimination that input signal can be produced by the present invention because of external interference electric wave or suppression；
And the bandwidth of output signal can also be adjusted by the present invention, make the collection signal one of output signal and input
Cause, ensure that the present invention accuracy to signal processing.The present invention is by the signal conversion after analyzing and processing
For after data signal accurately and be transferred to the controller of light-operated LED control system, controller is then according to reception
Data signal control the open and close of LED.
Meanwhile, the null offset of common-mode signal can be suppressed by the present invention, and can also enter difference mode signal
Row amplifies, thus improves the present invention accuracy to signal processing.For the practical effect of the present invention,
Described process chip U the most preferentially uses the integrated chip of AD603 to realize.
According to above-described embodiment, can well realize the present invention.
Claims (5)
1. a light-operated LED signal processing system based on differential amplifier circuit, it is characterised in that main
Will be by processing chip U, audion VT1, N pole is connected with the FDBK pin processing chip U, P pole
Diode D2, the P pole being connected with the COM pin processing chip U after resistance R6 is after resistance R7
With the diode that VNEG pin is connected, N pole is connected with the base stage of audion VT1 processing chip U
D3, the low-pass filter circuit being connected with the GNEG pin processing chip U, it is serially connected in low-pass filter circuit
And the differential amplifier circuit processed between the VINP pin of chip U, and send out with audion VT1 respectively
The signal that emitter-base bandgap grading is connected with process chip U launches modulate circuit composition；The colelctor electrode of described audion VT1
It is connected with the FDBK pin processing chip U.
A kind of light-operated LED signal processing based on differential amplifier circuit the most according to claim 1
System, it is characterised in that described differential amplifier circuit by amplifier P3, amplifier P4, audion VT2,
Positive pole positive pole with amplifier P3 after resistance R13 is connected, negative pole is as the input of differential amplifier circuit
And polar capacitor C10, the N pole being connected with low-pass filter circuit is connected with the base stage of audion VT2, P
The pole diode D5 that sequentially negative pole with amplifier P3 is connected after inductance L, after positive electrode resistance R15 with
The colelctor electrode of audion VT2 is connected, negative pole negative pole with amplifier P3 after resistance R14 is connected
Polar capacitor C11, positive pole is connected with the emitter stage of audion VT3 after resistance R resistance R16, negative pole
The polar capacitor C12 being connected with the positive pole of amplifier P4, positive pole after resistance R17 with amplifier P4's
Positive pole is connected, the polar capacitor C13 of minus earth, and P pole after resistance R18 with amplifier P4's
The diode D6 composition that negative pole is connected, N pole outfan with amplifier P4 after resistance R19 is connected；
The positive pole of described polar capacitor C12 is connected with the outfan of amplifier P3；Described polar capacitor C11's is negative
Pole ground connection；The P pole ground connection of described diode D6；The outfan of described amplifier P4 is as differential amplification electricity
Road outfan is also connected with the VINP pin processing chip U.
A kind of light-operated LED signal processing based on differential amplifier circuit the most according to claim 2
System, it is characterised in that described low-pass filter circuit by amplifier P1, the positive pole phase of positive pole and amplifier P1
Connect, negative pole as the polar capacitor C1 of the input of low-pass filter circuit, one end is with polar capacitor C1's
Negative pole is connected, the resistance R1 of other end ground connection, and positive pole negative pole with amplifier P1 after resistance R2 is connected
Connect, the polar capacitor C2 of minus earth, positive pole positive pole with amplifier P 1 after resistance R3 is connected, negative
Polar capacitor C3, the P pole that pole is connected with the outfan of amplifier P1 is connected with the positive pole of amplifier P1,
The diode D1 that N pole negative pole with polar capacitor C3 after resistance R4 is connected, and negative pole and amplifier
The pole that the outfan of P1 is connected, positive pole is connected with the GNEG pin processing chip U after resistance R5
Property electric capacity C4 composition；The outfan of described amplifier P1 is connected with the negative pole of polar capacitor C10.
A kind of light-operated LED signal processing based on differential amplifier circuit the most according to claim 3
System, it is characterised in that described signal launches modulate circuit by field effect transistor MOS, amplifier P2, N pole
Be connected with the drain electrode of field effect transistor MOS, P pole after resistance R8 with process chip U VPOS pin
The diode D4 being connected, negative pole outfan with amplifier P2 after resistance R11 is connected, positive pole warp
The polar capacitor C5 being connected with the drain electrode of field effect transistor MOS after resistance R9, one end and field effect transistor MOS
The adjustable resistance R10 that source electrode is connected, the other end is connected with the outfan of amplifier P2, negative pole and field
The polar capacitor C6 that the source electrode of effect pipe MOS is connected, positive pole is connected with the positive pole of amplifier P2, just
Pole is connected with the emitter stage of audion VT1, negative pole negative pole with amplifier P2 after resistance R12 is connected
The polar capacitor C7 connect, positive pole is connected with the outfan of amplifier P2, negative pole launches conditioning as signal
The polar capacitor C8 of the outfan of circuit, and positive pole is connected with the outfan of amplifier P2, negative pole with
The polar capacitor C9 composition that the negative pole of polar capacitor C8 is connected；The minus earth of described polar capacitor C7；
The grid of described field effect transistor MOS is connected with the VOUT pin processing chip U.
A kind of light-operated LED signal processing based on differential amplifier circuit the most according to claim 4
System, it is characterised in that described process chip U is the integrated chip of AD603.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610460388.2A CN105979654A (en) | 2016-06-22 | 2016-06-22 | Differential amplification circuit-based signal processing system for optical control LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610460388.2A CN105979654A (en) | 2016-06-22 | 2016-06-22 | Differential amplification circuit-based signal processing system for optical control LED |
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| Publication Number | Publication Date |
|---|---|
| CN105979654A true CN105979654A (en) | 2016-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610460388.2A Pending CN105979654A (en) | 2016-06-22 | 2016-06-22 | Differential amplification circuit-based signal processing system for optical control LED |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133206A (en) * | 2019-06-19 | 2019-08-16 | 金陵科技学院 | A kind of multi-parameter combined type water monitoring device and detection method |
-
2016
- 2016-06-22 CN CN201610460388.2A patent/CN105979654A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133206A (en) * | 2019-06-19 | 2019-08-16 | 金陵科技学院 | A kind of multi-parameter combined type water monitoring device and detection method |
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Application publication date: 20160928 |