CN209472791U - A kind of All-in-One dim signal processing circuit - Google Patents
A kind of All-in-One dim signal processing circuit Download PDFInfo
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- CN209472791U CN209472791U CN201821670520.3U CN201821670520U CN209472791U CN 209472791 U CN209472791 U CN 209472791U CN 201821670520 U CN201821670520 U CN 201821670520U CN 209472791 U CN209472791 U CN 209472791U
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Abstract
The utility model relates to a kind of All-in-One dim signal processing circuits, including dim signal input terminal and dim signal output end, further include: with the dim signal the input terminal successively input signal processing circuit, modulation circuit of cascade connection, isolation circuit and output Shaping circuit, the oscillatory signal output circuit being connect with the modulation circuit, wherein the output Shaping circuit includes the multiple signal output apparatus being separately connected with the dim signal output end.Implement the utility model low cost and high practicability, while meeting new legislation and more use demands.
Description
Technical field
The utility model relates to light adjusting circuits, more specifically to a kind of All-in-One dim signal processing circuit.
Background technique
Now in illumination market, LED illumination System is with its high photosynthetic efficiency, and high stability, the long-life, low energy consumption, configuration is flexibly
Equal outstanding advantages occupy most of illumination application, and various families are eventually also completely covered in positive development
Inside and outside lighting demand.
And in LED illumination application, with the expansion of market scale, for the demand for adapting to various illumination occasions, illumination system
System also develops to automation, intelligentized control method direction, various also vigorously to send out by environment and the adjustable light power supply of user demand
Zhan Zhong.
Existing light regulating technology substantially includes following: input terminal controls silicon-controlled stepless dimming；Three sections of input terminal control is (more
Section) stepping light modulation；Output end controls analog voltage (common is 0-10V) stepless dimming；Output end controls variable resistance light modulation；It is defeated
Outlet controls the light modulation of variable duty ratio pulse waveform signal.In these common dimming modes, dim signal and LED constant current are required
The input terminal or output end of driving power have electrical connection, due to needing manpower to operate in Dimming operation, in practical application
In can bring electric shock risk, be not able to satisfy newest safety standard UL8750.And in existing dimming mode, whether input
Controllable silicon light modulation and the multistage light modulation of control are held, or the dimming mode of the single light modulation or All-in-One controlled in output end,
Since the input terminal or output end of dim signal processing part and LED constant current driving power have electrical connection, grasped in manpower
It might have security risk during making.And forbid selling in some areas at present.Therefore needing research and development has insulation
The dim signal processing circuit module of isolation, to adapt to more demands.
Utility model content
The technical problem to be solved by the present invention is to provide one for the above-mentioned portion of techniques defect of the prior art
Kind All-in-One dim signal processing circuit.
The technical scheme adopted by the utility model to solve the technical problem is as follows: constructing a kind of All-in-One dim signal processing
Circuit, including dim signal input terminal and dim signal output end, further includes: with the dim signal input terminal successively company of cascade
Input signal processing circuit, modulation circuit, isolation circuit and the output Shaping circuit connect, the oscillation being connect with the modulation circuit
Signal output apparatus, wherein the output Shaping circuit includes that multiple signals for being separately connected with the dim signal output end are defeated
Circuit out.
Preferably, the input signal processing circuit includes that integral follows circuit, attenuator circuit and constant-current source:
The integral follows dim signal input terminal described in circuit connection, for what is inputted in the dim signal input terminal
Operation is carried out when dim signal is pwm signal, to the pwm signal to obtain the first voltage signal for meeting preset condition, together
When for the light modulation input terminal access analog DC voltage dim signal when, generation tertiary voltage signal；
The constant-current source is connected with the dim signal input terminal, adjustable for connecting in the dim signal input terminal
When resistance, in the second voltage signal for integrating and circuit output end generation being followed to meet the preset condition；
The attenuator circuit connection integral follows circuit, for the first voltage signal, the second voltage
Signal or the tertiary voltage signal are decayed.
Preferably, the constant-current source includes voltage reference chip U4, triode Q2, triode Q1, resistance R9, resistance R10
With zener diode ZD1, the sampling end of the voltage reference chip U4 is connected after connecting with its cathode with power supply VCC, described
The anode of voltage reference chip U4 connects the emitter of the triode Q1, and the base stage of the triode Q1 and its collector connect
It connects and is grounded through the resistance R10, the base stage of the triode Q1 connects the base stage of the triode Q2, the triode Q2
Emitter be connected through the resistance R9 with the power supply VCC, the collector of the triode Q2 connects the dim signal
The cathode of input terminal and the zener diode ZD1, the plus earth of the zener diode ZD1；And/or
The attenuator circuit includes that one end connection integral of resistance R12 and resistance R13, the resistance R12 follow electricity
Road, the other end of the resistance R12 connect one end of the modulation circuit and the resistance R13, the other end of the resistance R13
Ground connection.
Preferably, the integral follows circuit to include integrating circuit and follow circuit；
The integrating circuit includes one end connection dim signal input of resistance R11 and capacitor C4, the resistance R11
End, the other end of the resistance R11 are grounded through the capacitor C4；
Described to follow circuit include operational amplifier U5, and the non-inverting input terminal of the operational amplifier U5 is through the resistance
R11 is connected with the dim signal input terminal and is grounded through the capacitor C4；The reverse input end of the operational amplifier U5
Connect the output end of the operational amplifier U5.
Preferably, the modulation circuit includes PWM modulation circuit；And/or
The oscillatory signal output circuit includes:
For generating the oscillating signal generating circuit of sawtooth signal；
It is connect with the oscillating signal generating circuit, for translating the sawtooth signal so that the sawtooth signal
The level shift circuit that low level is zero.
Preferably, the PWM modulation circuit includes comparator U3, and the non-inverting input terminal of the comparator U3 connects the vibration
Signal output apparatus is swung, the reverse input end of the comparator U3 connects the input signal processing circuit；And/or
The oscillating signal generating circuit includes voltage reference chip U1, comparator U2, diode D1 and diode D2；
The sampling end of the voltage reference chip U1 is connect through resistance R2 with its cathode, and upon connection through resistance R1 and electricity
VCC connection in source is connect through resistance R4 with the non-inverting input terminal of the comparator U2；The sampling of the voltage reference chip U1 simultaneously
End is grounded through resistance R3 simultaneously, the plus earth of the voltage reference chip U1；
The reverse input end of the comparator U2 is connected with the power supply VCC through resistance R6, is grounded through capacitor C2, described
The non-inverting input terminal of comparator U2 is grounded through the resistance R5；
The anode of the diode D1 is connected through resistance R7 with the non-inverting input terminal of the comparator U2, the diode
The cathode of D1 connects the output end of the comparator U2；
The anode of the diode D2 connects the reverse input end of the comparator U2, while connecting the level transfer electricity
Road；The cathode of the diode D2 connects the output end of the comparator U2.
Preferably, the level shift circuit includes capacitor C3 and resistance R8；
One end of the capacitor C3 connects the anode of the diode D2, and the other end of the capacitor C3 connects the PWM
Modulation circuit；
One end of the resistance R8 connects the PWM modulation circuit, the other end ground connection of the resistance R8.
Preferably, the isolation circuit includes optocoupler OT1B；
The second pin of the optocoupler OT1B connects the output end of the modulation circuit, the 4th pin of the optocoupler OT1B
Connect the output Shaping circuit.
Preferably, the multiple signal output apparatus includes the output of open-drain pwm signal, the output of clipping pwm signal and simulation
Voltage signal output.
Preferably,
Open-drain pwm signal output includes metal-oxide-semiconductor Q3, and the grid of the metal-oxide-semiconductor Q3 connects the of the optocoupler OT1B
The drain electrode of four pins, the metal-oxide-semiconductor Q3 is connected through switch K1 with the dim signal output end；
Clipping pwm signal output includes metal-oxide-semiconductor Q4, and the grid of the metal-oxide-semiconductor Q4 connects the of the optocoupler OT1B
Four pins, the drain electrode of the metal-oxide-semiconductor Q4 is through resistance R16 connection power vd D and through switch K2 and the dim signal output end phase
Connection；
The analog voltage signal output includes operational amplifier U6, and the non-inverting input terminal of the operational amplifier U6 is passed through
Resistance R17 is connected with the drain electrode of the metal-oxide-semiconductor Q4 and passes through capacitor C5 ground connection, the anti-phase input of the operational amplifier U6
End connects its output end and is connected through switch K3 with the dim signal output end.
Implement the utility model a kind of All-in-One dim signal processing circuit, have the advantages that low cost and
And high practicability, while meeting new legislation and more use demands.
Detailed description of the invention
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing:
Fig. 1 is a kind of logic diagram of All-in-One dim signal processing circuit first embodiment of the utility model；
Fig. 2 is a kind of logic diagram of All-in-One dim signal processing circuit second embodiment of the utility model；
Fig. 3 is a kind of circuit diagram of one embodiment of All-in-One dim signal processing circuit of the utility model.
Specific embodiment
For a clearer understanding of the technical features, objectives and effects of the utility model, now control attached drawing is detailed
Illustrate specific embodiment of the present utility model.
As shown in Figure 1, in a kind of All-in-One dim signal processing circuit first embodiment of the utility model, including adjust
Optical signal input and dim signal output end, further includes: at dim signal the input terminal successively input signal of cascade connection
Circuit 10, modulation circuit 20, isolation circuit 40 and output Shaping circuit 50 are managed, the oscillator signal output connecting with modulation circuit 20
Circuit 30, wherein output Shaping circuit 50 includes the multiple signal output apparatus being separately connected with dim signal output end.Specifically
, after dim signal is inputted by dim signal input terminal, after the preliminary treatment by input signal processing circuit 10, into tune
Circuit 20 processed, modulation circuit 20 receive the oscillator signal that oscillatory signal output circuit 30 inputs, and dim signal is modulated, obtains
Then the dimming input signal met the requirements, such as the pulse signal met the requirements pass through isolation circuit 40, pass through isolation circuit
40 isolation drive effect drives the output Shaping circuit 50 of rear class to generate a variety of dim signals output needed, to match not
Same back-end circuit.It is further appreciated that input signal processing circuit 10 here is used to carry out different input signals
Normalized, to obtain normalized dim signal input.
Further, as shown in Fig. 2, input signal processing circuit 10 includes that integral follows circuit 11,12 and of attenuator circuit
Constant-current source 13: integral follows circuit 11 to connect dim signal input terminal, the dim signal for inputting in dim signal input terminal
Operation is carried out when for pwm signal, to pwm signal to obtain the first voltage signal for meeting preset condition, while for dimming
When input terminal accesses analog DC voltage dim signal, tertiary voltage signal is generated；Constant-current source 13 and dim signal input terminal phase
Connection meets preset condition for following 11 output end of circuit to generate in integral when dim signal input terminal connects adjustable resistance
Second voltage signal；Attenuator circuit 12 connection integral follow circuit 11, for first voltage signal, second voltage signal or
Tertiary voltage signal is decayed.Specifically, integral follow circuit 11 for exchange optical signal input input pwm signal into
Row integral operation exports the voltage signal i.e. first voltage signal for being proportional to the pwm signal duty ratio, while also as outer
Connect the filter function of analog voltage signal, in this way when dim input terminal access analog DC voltage dim signal when, integral with
Tertiary voltage signal is generated with 11 output end of circuit, constant-current source 13 generates a fixed source current here, outer for detecting
Adjustable resistance is connect, the voltage signal for being proportional to resistance value is generated, which is integrating after integral follows circuit
Circuit output end is followed to generate second voltage signal；Ratio attenuation units are used for above-mentioned first voltage signal, second voltage
Signal or tertiary voltage signal carry out that treated normalizing signal are decayed by a certain percentage, to match oscillator signal output
The sawtooth signal amplitude that circuit 30 generates.It is illustrated by taking existing several different dim signal inputs as an example, works as light modulation
When input signal output end is pwm signal, the amplitude for defining PWM is 10V, and duty ratio is 0-100%, and pwm signal can also be offset
Pwm signal is converted to analog voltage by integrating the processing for following the meeting of circuit 11 to pwm signal by the influence for falling constant-current source 13
That is then first voltage signal is handled by attenuator circuit 12, obtain normalized dim signal input.It needs exist for adding
It is bright, when dim signal input terminal be analog voltage 0-10V light modulation input when, due to constant-current source 13 export electric current very
It is small only 100uA can be ignored so analog voltage can easily balance out the influence of constant-current source 13, at this time integrate with
The signal follower of a 1:1 is equivalent to analog voltage with circuit, output is followed to export needs by attenuator circuit 12 later
Normalized dim signal input.When dim signal input terminal be 0-100K adjustable resistance light modulation when, due to resistance be by
Dynamic element, will not generate energy, so the output of constant-current source 13 can be by resistance, according to Ohm's law, U=IR, I are constant-current sources
The definite value 100uA, R of 13 outputs are 0-100K ohm of variable resistances, and it can be straightening for a 0-10V that, which just obtains output U,
Galvanic electricity pressure is second voltage signal, this DC voltage appears on the node of variable resistance and constant-current source 13, then to this
The processing mode of DC voltage can refer to previously described dimming input signal of working as the treatment process of 0-10V analog voltage, most
After obtain the input of normalized dim signal.In this way in the case where different application scenarios, that is, different light modulation exports, pass through
The input signal processing circuit 10, the unified input terminal for exporting normalized dim signal and being input to modulation circuit 20.In addition,
Under some scenes for not needing resistance light modulation, 13 part of constant-current source can be saved, to advanced optimize product cost.
Further, in some embodiments, constant-current source 13 include voltage reference chip U4, triode Q2, triode Q1,
Resistance R9, resistance R10 and zener diode ZD1, the sampling end of voltage reference chip U4 connect with its cathode after with power supply VCC phase
Connection, the emitter of the anode connecting triode Q1 of voltage reference chip U4, the collector of triode Q1 are connect, simultaneously with its base stage
It is grounded through resistance R10, the base stage of the base stage connecting triode Q2 of triode Q1, the emitter of triode Q2 is through resistance R9 and power supply
VCC is connected, the cathode of collector connection the dim signal input terminal and zener diode ZD1 of triode Q2, zener diode
The plus earth of ZD1.Specifically, constant-current circuit unit can be by resistance R9, resistance R10, triode Q1, triode Q2, voltage
Fiducial chip U4, zener diode ZD1 composition, wherein voltage reference chip U4, triode Q1, resistance R10 concatenation are followed by
Feeder ear, that is, the end power supply VCC generates a high-precision reference voltage signal at the both ends voltage reference chip U4, here voltage base
Quasi core piece can be using such as can produce 2.5V benchmark with AZ431 or AZ432 can produce 1.25V benchmark, it is of course possible to use it
His 2.5V benchmark device or 1.25V benchmark device, triode Q1 and Q2 select the triode of same model to guarantee symmetry,
Such as needing better effect that twin double-triode valve encapsulation can be selected, the base stage of triode Q1 is connected with collector becomes diode
It uses, since triode Q1 and Q2 characteristic is very much like, therefore base stage-hair of the base-emitter of triode Q1 and triode Q2
Emitter characteristic is symmetrical, including voltage drop loss is also extremely consistent with temperature characterisitic, only needs to be arranged the resistance value of resistance R9 at this time
A constant electric current output, calculation formula are as follows: the both ends voltage reference chip U4 can be obtained in the collector terminal of triode Q2
Reference voltage/R9 resistance value=Q2 collector exports electric current, such as voltage reference chip U4 uses AZ431, obtains 2.5V benchmark
Voltage, it is 25K ohm to get to 2.5 volts/25000 Europe=0.0001=100 micro-ampere currents of peace that resistance R9, which chooses resistance value, is somebody's turn to do
Electric current can be invariable, can be according to the resistance of variable resistance in triode Q2 collector and power supply ground terminal access variable resistance
Value converses the voltage signal for being proportional to resistance value.When light modulation input terminal is hanging, triode Q2 collector voltage can be increased,
So needing in triode Q2 collector between ground and connecing a zener diode ZD1, the pressure stabilizing value of zener diode ZD1
It can choose according to actual needs, it is 10V that custom interface, which defines the voltage,.There is better temperature if necessary to zener diode ZD1
Characteristic, can be worth slightly lower zener diode and play a reversed role one or 2 general-purpose diodes by choosing a pressure stabilizing and replace, by
It can be with ptc characteristics when zener diode back biased in the negative temperature coefficient feature of conventional diode forward bias
It is complementary to a certain extent, to realize that automatic compensation is asked by circuit operating ambient temperature variation bring precision of voltage regulation temperature drift
Topic.Here in constant-current source 13, if precision prescribed is not very high, triode Q1 can be saved, i.e. voltage reference core
The lower end piece U4 is directly connected to triode Q2 base stage and the upper end resistance R10, and the resistance value for redesigning resistance R9 at this time is i.e. adjustable
To desired constant current value.
In further embodiments, attenuator circuit 12 includes resistance R12 and resistance R13, and one end of resistance R12 connects integral
Follow circuit 11, one end of the other end connection modulation circuit and resistance R13 of resistance R12, the other end ground connection of resistance R13.Tool
Body, circuit output voltage signal can be followed to carry out certain proportion integral on demand by configuring resistance R12 and resistance R13
Decaying, it is to match oscillatory signal output circuit 30, the amplitude of the oscillator signal of output, such as oscillator signal amplitude as 2V, then electric
The partial pressure for hindering R12 and resistance R13 decays to 2V signal level by correspondence when the input of dim signal maximum.
In further embodiments, integral follows circuit 11 to include integrating circuit and follow circuit；Integrating circuit includes electricity
R11 and capacitor C4 is hindered, one end of resistance R11 connects dim signal input terminal, and the other end of resistance R11 is grounded through capacitor C4；With
It include operational amplifier U5 with circuit, the non-inverting input terminal of operational amplifier U5 passes through resistance R11 and dim signal input terminal phase
It connects and is grounded through capacitor C4；The output end of the reverse input end connection operational amplifier U5 of operational amplifier U5.Specifically,
Integral follow integrating circuit in circuit 11 to be made of R11, C4, for exchange optical signal input input PWM dim signal into
Row integral operation obtains the voltage signal for being proportional to PWM dim signal duty ratio, while also doubling as dim signal input terminal
The filter function of the analog voltage signal of input terminal input, if dim signal input terminal connection variable resistance is dimmed,
By constant-current source 13 converse come voltage signal also pass through the circuit transmission give junior use.
Further, in some embodiments, modulation circuit 20 includes PWM modulation circuit；In addition, as shown in Fig. 2, another
In some embodiments, oscillatory signal output circuit 30 includes: the oscillating signal generating circuit 31 for generating sawtooth signal；With
Oscillating signal generating circuit 31 connects, for translating sawtooth signal so that the level deviation that the low level of sawtooth signal is zero
Circuit 32.Specifically, oscillating signal generating circuit 31 generate a linear gradient rise ramp pulse, and have quickly under
Constant amplitude frequency-fixed signal, that is, sawtooth signal of drop；Level shift circuit 32 believes the sawtooth wave that oscillating signal generating circuit 31 exports
Number carry out level deviation, make the pulse base of sawtooth signal with the starting point in circuit zero potential each period；Pass through PWM modulation
20 pairs of circuit by treated the normalized dim signal input of input signal processing circuits 10 and carry out the saw of level deviation
Tooth wave signal is handled, one group of duty ratio direct ratio of final output or the square pulse waveform for being inversely proportional to dimming input signal.
Further, as shown in figure 3, in some embodiments, PWM modulation circuit includes comparator U3, comparator U3's
Non-inverting input terminal connects oscillatory signal output circuit 30, and the reverse input end of comparator U3 connects input signal processing circuit 10.
Specifically, the modulated signal output of PWM modulation circuit is completed by comparator U3, sawtooth wave is inputted in two input terminals of comparator U3
Signal and the input of normalized dim signal are compared processing, in comparator U3 output end one group of duty ratio direct ratio of output or instead
Than in the square pulse waveform of dimming input signal, the output waveform that direct ratio or inverse ratio dim signal input here, Ke Yitong
The connection relationship for overregulating two input terminals of comparator U3 is realized.
In further embodiments, oscillating signal generating circuit 31 includes voltage reference chip U1, comparator U2, diode
D1 and diode D2；The sampling end of voltage reference chip U1 is connect through resistance R2 with its cathode, and upon connection through resistance R1 with
Power supply VCC connection is connect through resistance R4 with the non-inverting input terminal of comparator U2, while the sampling end of voltage reference chip U1 is through electricity
Hinder R3 ground connection, the plus earth of voltage reference chip U1；The reverse input end of comparator U2 is connected through resistance R6 with power supply VCC
It connects, be grounded through capacitor C2, the non-inverting input terminal of comparator U2 is grounded through resistance R5；The anode of diode D1 is through resistance R7 compared with
The non-inverting input terminal of device U2 is connected, the output end of the cathode connection comparator U2 of diode D1；The anode connection of diode D2
The reverse input end of comparator U2, while connecting level shifter；The output end of the cathode connection comparator U2 of diode D2.
Specifically, resistance R2, resistance R3, resistance R1 and voltage reference chip U1 form an accurate reference voltage, the voltage source is defeated
The non-inverting input terminal of the input comparator U2 after resistance R4 and R5 partial pressure of voltage out, while power supply VCC supply voltage is by electricity
R6 is hindered to capacitor C2 charging and input comparator U2 inverting input terminal, capacitor C2 both end voltage gradually rise to be more than comparator U2
Non-inverting input terminal moment, comparator U2 output switching activity spark to capacitor C2 by diode D2, this moment capacitor C2 two
End voltage is discharged into lower than comparator U2 non-inverting input terminal voltage, and comparator U24 is overturn again, and capacitor C2 capacitor fills again
Electricity, circulation realize above step, finally take out a ramp voltage at the both ends capacitor C2.Since power supply VCC supply voltage is constant,
Resistance R6 and capacitor C2 is also preset parameter, so the time constant of the charge circuit is also definite value.The charging curve is not
Linear rise, but the preferable one section of curve conduct of the wherein linearity can be chosen by configuring resistance R4 and resistance R7
Ramp signal, by compare, can preferably total voltage 1/6 or so voltage amplitude line segment be ramp reference, it is available compared with
The good linearity.Such as the charging curve in 15V amplitude, desirable 0-2.5V stage make ramp signal.In addition, oscillator signal occurs
Diode D1 and D2 in circuit 31 are selected with the diode of model to guarantee symmetry, need to can be selected when better effect twin
Raw common-cathode dual-diode encapsulation.
Further, level shift circuit 32 includes capacitor C3 and resistance R8；One end connection diode D2's of capacitor C3
The other end of anode, capacitor C3 connects PWM modulation circuit；One end of resistance R8 connects PWM modulation circuit, the other end of resistance R8
Ground connection.Specifically, the serrated signal that oscillating signal generating circuit 31 obtains is possible to starting point not in zero potential when some
Point needs that serrated signal is remedied to zero potential by level shift circuit 32, is re-fed at PWM modulation circuit input end
Reason.
Further, isolation circuit 40 includes optocoupler OT1B；The second pin of optocoupler OT1B connects the defeated of modulation circuit 20
4th pin of outlet, optocoupler OT1B connects output Shaping circuit 50.Specifically, the square wave that modulation circuit 20 exports drives optocoupler
The luminous tube side of OT1B obtains the square-wave signal by Phototube Coupling in the phototriode side of optocoupler OT1B.
Further, as shown in Figures 2 and 3, multiple signal output apparatus include that open-drain pwm signal exports 51, clipping PWM
Signal output 52 and analog voltage signal output 53.Specifically, dim signal output may include open-drain pwm signal output 51,
Clipping pwm signal output 52 and analog voltage signal output 53 can also wherein any combination arrange in pairs or groups.
Further, open-drain pwm signal output 51 includes metal-oxide-semiconductor Q3, and the grid of metal-oxide-semiconductor Q3 connects the 4th of optocoupler OT1B the
The drain electrode of pin, metal-oxide-semiconductor Q3 is connected through switch K1 with dim signal output end；Clipping pwm signal output 52 includes metal-oxide-semiconductor
The 4th pin of the grid connection optocoupler OT1B of Q4, metal-oxide-semiconductor Q4, the drain electrode of metal-oxide-semiconductor Q4 through resistance R16 connection power vd D and pass through
Switch K2 is connected with dim signal output end；Analog voltage signal output 53 includes operational amplifier U6, operational amplifier U6
Non-inverting input terminal by resistance R17 be connected with the drain electrode of metal-oxide-semiconductor Q4 and pass through capacitor C5 be grounded, operational amplifier U6's
Inverting input terminal connects its output end and is connected through switch K3 with dim signal output end.Specifically, output Shaping processing is single
Member may include that metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4, resistance R16, resistance R17, capacitor C5, operational amplifier U6 and multiselect 1 switch
The different channels switched using understanding K1, K2 and K3 as multiselect 1, the square-wave signal by optocoupler OT1B transmitting drives metal-oxide-semiconductor Q3, real
The PWM output of existing open-drain output；Square-wave signal by optocoupler OT1B transmitting drives metal-oxide-semiconductor Q4, and the drain electrode of metal-oxide-semiconductor Q4 is logical
It crosses resistance R16 and is connected to secondary side power supply VDD, realize that exporting the PWM that one group of amplitude is VDD level exports, if necessary
It is the purpose that can reach various output violent changes that VDD supply voltage, which can be changed, in change amplitude；The clipping PWM letter exported through metal-oxide-semiconductor Q4
It, should number by by operational amplifier U6 Buffer output, analog voltage signal output can be realized after resistance R17 and capacitor C5 integral
Analog voltage signal amplitude is up to VDD power supply amplitude, and amplitude peak corresponds to maximum dimmer signal, obtains if necessary more
High-precision range signal terminates the high-precision regulated power supply of reconfiguration at power vd D on resistance R16.Here a variety of light modulations
The output signal of signal, to dim signal output end, is only connected a moment by selection switching and wherein arrives tune all the way
Light signal output end, i.e. multiselect one output, with the more applications of compatibility.
It should be understood that above embodiments only express preferred embodiments of the present invention, describe more specific
With it is detailed, but it should not be understood as limiting the scope of the patent of the utility model；It should be pointed out that for this field
Those of ordinary skill for, without departing from the concept of the premise utility, can to above-mentioned technical characterstic carry out freely
Combination, various modifications and improvements can be made, and these are all within the protection scope of the present invention；Therefore, all practical with this
The equivalents and modification that novel scope of the claims is done, should belong to the covering scope of the utility model claims.
Claims (10)
1. a kind of All-in-One dim signal processing circuit, including dim signal input terminal and dim signal output end, feature exist
In, further includes: with the dim signal input terminal successively the input signal processing circuit (10), modulation circuit of cascade connection, every
From circuit (40) and output Shaping circuit (50), the oscillatory signal output circuit (30) being connect with the modulation circuit (20),
Described in output Shaping circuit (50) include the multiple signal output apparatus being separately connected with the dim signal output end.
2. All-in-One dim signal processing circuit according to claim 1, which is characterized in that the input signal processing electricity
Road (10) includes that integral follows circuit (11), attenuator circuit (12) and constant-current source (13):
The integral follows circuit (11) to connect the dim signal input terminal, for what is inputted in the dim signal input terminal
Operation is carried out when dim signal is pwm signal, to the pwm signal to obtain the first voltage signal for meeting preset condition, together
When for the light modulation input terminal access analog DC voltage dim signal when, generation tertiary voltage signal；
The constant-current source (13) is connected with the dim signal input terminal, adjustable for connecting in the dim signal input terminal
In the second voltage signal for integrating and the generation of circuit (11) output end being followed to meet the preset condition when resistance；
Attenuator circuit (12) the connection integral follows circuit (11), for the first voltage signal, described second
Voltage signal or the tertiary voltage signal are decayed.
3. All-in-One dim signal processing circuit according to claim 2, which is characterized in that
The constant-current source (13) includes voltage reference chip U4, triode Q2, triode Q1, resistance R9, resistance R10 and pressure stabilizing two
Pole pipe ZD1, the sampling end of the voltage reference chip U4 are connected after connecting with its cathode with power supply VCC, the voltage reference
The anode of chip U4 connects the emitter of the triode Q1, and the base stage of the triode Q1 connect with its collector and through institute
Resistance R10 ground connection is stated, the base stage of the triode Q1 connects the base stage of the triode Q2, the emitter warp of the triode Q2
The resistance R9 is connected with the power supply VCC, and the collector of the triode Q2 connects the dim signal input terminal and institute
State the cathode of zener diode ZD1, the plus earth of the zener diode ZD1；And/or
The attenuator circuit (12) includes that one end connection integral of resistance R12 and resistance R13, the resistance R12 follow electricity
Road (11), the other end of the resistance R12 connect one end of the modulation circuit and the resistance R13, and the resistance R13's is another
One end ground connection.
4. All-in-One dim signal processing circuit according to claim 2, which is characterized in that the integral follows circuit
It (11) include integrating circuit and following circuit；
The integrating circuit includes one end connection dim signal input terminal of resistance R11 and capacitor C4, the resistance R11,
The other end of the resistance R11 is grounded through the capacitor C4；
It is described that follow circuit include operational amplifier U5, the non-inverting input terminal of the operational amplifier U5 through the resistance R11 with
The dim signal input terminal is connected and is grounded through the capacitor C4；The reverse input end of the operational amplifier U5 connects
The output end of the operational amplifier U5.
5. All-in-One dim signal processing circuit according to claim 1, which is characterized in that modulation circuit (20) packet
Include PWM modulation circuit；And/or
The oscillatory signal output circuit (30) includes:
For generating the oscillating signal generating circuit (31) of sawtooth signal；
It connect with the oscillating signal generating circuit (31), for translating the sawtooth signal so that the sawtooth signal
The level shift circuit (32) that low level is zero.
6. All-in-One dim signal processing circuit according to claim 5, which is characterized in that
The PWM modulation circuit includes comparator U3, and the non-inverting input terminal of the comparator U3 connects the oscillator signal output
The reverse input end of circuit (30), the comparator U3 connects the input signal processing circuit (10)；And/or
The oscillating signal generating circuit (31) includes voltage reference chip U1, comparator U2, diode D1 and diode D2；
The sampling end of the voltage reference chip U1 is connect through resistance R2 with its cathode, and upon connection through resistance R1 and power supply
VCC connection is connect through resistance R4 with the non-inverting input terminal of the comparator U2, while the sampling end of the voltage reference chip U1
It is grounded through resistance R3, the plus earth of the voltage reference chip U1；
The reverse input end of the comparator U2 is connected with the power supply VCC through resistance R6, is grounded through capacitor C2, the comparison
The non-inverting input terminal of device U2 is grounded through resistance R5；
The anode of the diode D1 is connected through resistance R7 with the non-inverting input terminal of the comparator U2, the diode D1's
Cathode connects the output end of the comparator U2；
The anode of the diode D2 connects the reverse input end of the comparator U2, while connecting the level shifter
(32)；The cathode of the diode D2 connects the output end of the comparator U2.
7. All-in-One dim signal processing circuit according to claim 6, which is characterized in that the level shift circuit
It (32) include capacitor C3 and resistance R8；
One end of the capacitor C3 connects the anode of the diode D2, and the other end of the capacitor C3 connects the PWM modulation
Circuit；
One end of the resistance R8 connects the PWM modulation circuit, the other end ground connection of the resistance R8.
8. All-in-One dim signal processing circuit according to claim 1, which is characterized in that isolation circuit (40) packet
Include optocoupler OT1B；
The second pin of the optocoupler OT1B connects the output end of the modulation circuit, the 4th pin connection of the optocoupler OT1B
The output Shaping circuit (50).
9. All-in-One dim signal processing circuit according to claim 8, which is characterized in that the multiple signal output electricity
Road includes open-drain pwm signal output (51), clipping pwm signal output (52) and analog voltage signal output (53).
10. All-in-One dim signal processing circuit according to claim 9, which is characterized in that
Open-drain pwm signal output (51) includes metal-oxide-semiconductor Q3, and the grid of the metal-oxide-semiconductor Q3 connects the of the optocoupler OT1B
The drain electrode of four pins, the metal-oxide-semiconductor Q3 is connected through switch K1 with the dim signal output end；
Clipping pwm signal output (52) includes metal-oxide-semiconductor Q4, and the grid of the metal-oxide-semiconductor Q4 connects the of the optocoupler OT1B
Four pins, the drain electrode of the metal-oxide-semiconductor Q4 is through resistance R16 connection power vd D and through switch K2 and the dim signal output end phase
Connection；
The analog voltage signal output (53) includes operational amplifier U6, and the non-inverting input terminal of the operational amplifier U6 is passed through
Resistance R17 is connected with the drain electrode of the metal-oxide-semiconductor Q4 and passes through capacitor C5 ground connection, the anti-phase input of the operational amplifier U6
End connects its output end and is connected through switch K3 with the dim signal output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821670520.3U CN209472791U (en) | 2018-10-15 | 2018-10-15 | A kind of All-in-One dim signal processing circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821670520.3U CN209472791U (en) | 2018-10-15 | 2018-10-15 | A kind of All-in-One dim signal processing circuit |
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| Publication Number | Publication Date |
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| CN209472791U true CN209472791U (en) | 2019-10-08 |
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ID=68086843
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821670520.3U Withdrawn - After Issue CN209472791U (en) | 2018-10-15 | 2018-10-15 | A kind of All-in-One dim signal processing circuit |
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| CN (1) | CN209472791U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109309989A (en) * | 2018-10-15 | 2019-02-05 | 深圳市崧盛电子股份有限公司 | A kind of All-in-One dim signal processing circuit |
| CN114423118A (en) * | 2021-12-29 | 2022-04-29 | 深圳市崧盛电子股份有限公司 | Three-in-one dimming circuit and LED lighting system |
-
2018
- 2018-10-15 CN CN201821670520.3U patent/CN209472791U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109309989A (en) * | 2018-10-15 | 2019-02-05 | 深圳市崧盛电子股份有限公司 | A kind of All-in-One dim signal processing circuit |
| CN109309989B (en) * | 2018-10-15 | 2023-12-08 | 深圳市崧盛电子股份有限公司 | All-in-one dimming signal processing circuit |
| CN114423118A (en) * | 2021-12-29 | 2022-04-29 | 深圳市崧盛电子股份有限公司 | Three-in-one dimming circuit and LED lighting system |
| CN114423118B (en) * | 2021-12-29 | 2024-04-02 | 深圳市崧盛电子股份有限公司 | Three-in-one dimming circuit and LED (light emitting diode) lighting system |
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