CN110264968A - Signal generating circuit - Google Patents
Signal generating circuit Download PDFInfo
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- CN110264968A CN110264968A CN201910396656.2A CN201910396656A CN110264968A CN 110264968 A CN110264968 A CN 110264968A CN 201910396656 A CN201910396656 A CN 201910396656A CN 110264968 A CN110264968 A CN 110264968A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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Abstract
This application discloses a kind of signal generating circuit, which includes: power supply unit, provides positive power supply signal and reverse phase power supply signal；Main circuit unit, output signal is generated according to input signal, output signal is sine wave, the positive supply end of main circuit unit receives positive power supply signal, the inverting power supplies end of main circuit unit receives reverse phase power supply signal, wherein, under normal power supply state, the instantaneous voltage value of positive power supply signal is higher than the instantaneous voltage value of output signal, the instantaneous voltage value of reverse phase power supply signal is lower than the instantaneous voltage value of output signal, in each positive half period of output signal, positive power supply signal is consistent with the variation tendency of output signal, and in each negative half-cycle of output signal, reverse phase power supply signal is consistent with the variation tendency of output signal.
Description
Technical field
The present invention relates to field of display technology, more particularly, to a kind of signal generating circuit.
Background technique
With the continuous development of liquid crystal display (Liquid Crystal Display, LCD) technology, LCD is more more and more universal,
It, can be by driving polymer dispersed liquid crystals (polymer dispersed liquid in order to protect the privacy of user
Crystal, PDLC) method realize peep-proof function.
Fig. 1 shows the signal waveform schematic diagram of the PDLC driving circuit of the prior art.
In the prior art, PDLC driving circuit has operational amplifier, generates output signal Vout according to input signal,
And operational amplifier needs positive power supply signal VS+ to be powered with reverse phase power supply signal VS-, as shown in Figure 1, output signal
Vout is AC signal, and positive power supply signal VS+ and the voltage of reverse phase power supply signal VS- remain constant, to cause
PDLC drive circuit power consumption very high problem.
Summary of the invention
The present invention provides a kind of signal generating circuit for the above problem in the presence of the prior art, to reduce
The power consumption of circuit.
The signal generating circuit provided according to the present invention, comprising: power supply unit provides positive power supply signal and reverse phase power supply
Signal；And main circuit unit, output signal is generated according to input signal, the output signal is sine wave, the main circuit
The positive supply end of unit receives the positive power supply signal, and the inverting power supplies end of the main circuit unit receives the reverse phase and supplies
Electric signal, wherein the instantaneous voltage value of the positive power supply signal is higher than the instantaneous voltage value of the output signal, the reverse phase
The instantaneous voltage value of power supply signal is lower than the instantaneous voltage value of the output signal, in each positive half period of the output signal
Interior, the positive power supply signal is consistent with the variation tendency of the output signal, and in each negative half period of the output signal
In phase, the reverse phase power supply signal is consistent with the variation tendency of the output signal.
Preferably, said supply unit voltage value of positive power supply signal according to reference sinusoidal Signal Regulation and described
The voltage value of reverse phase power supply signal.
Preferably, the input signal is sine wave, and said supply unit receives the input signal, by the input
Signal is as the reference sinusoidal signal.
Preferably, said supply unit includes: rectification module, carries out all-wave to the input signal or reference sinusoidal signal
Rectification is to obtain rectified signal；Adjustment module adjusts feedback signal according to the rectified signal；And output module, for producing
The raw positive power supply signal and the reverse phase power supply signal, and according to the feedback signal adjust the positive power supply signal with
The voltage value of the reverse phase power supply signal.
Preferably, the rectification module includes: the first operational amplifier, second operational amplifier, first diode, second
Diode, first resistor, second resistance, 3rd resistor, the 4th resistance and the 5th resistance, first operational amplifier is just
Phase feeder ear and the positive feeder ear of the second operational amplifier receive the first reference voltage, first operational amplifier
The reverse phase feeder ear of reverse phase feeder ear and the second operational amplifier receives the second reference voltage, the first resistor, described
Second resistance and the 3rd resistor are sequentially connected in series inverting input terminal and second fortune in first operational amplifier
Between the output end for calculating amplifier, and the rectified signal is obtained in the output end of the second operational amplifier, the described 4th
The first end of resistance receives the input signal or the reference sinusoidal signal, the second end and described first of the 4th resistance
The inverting input terminal of operational amplifier is connected, the 5th resistance be connected on the inverting input terminal of first operational amplifier with
Between the cathode of second diode, the anode of the cathode of the first diode and second diode respectively with it is described
The output end of first operational amplifier is connected, the anode of the first diode and the first resistor, the second resistance it
Between intermediate node be connected, the normal phase input end of first operational amplifier is connected with ground reference, second operation
The normal phase input end of amplifier is connected with the cathode of second diode, the inverting input terminal of the second operational amplifier with
Intermediate node between the second resistance, the 3rd resistor is connected.
Preferably, the resistance value of the first resistor includes 10 kilo-ohms, and the resistance value of the second resistance includes 10 kilo-ohms, described
The resistance value of 3rd resistor includes 30 kilo-ohms, and the resistance value of the 4th resistance includes 10 kilo-ohms, and the resistance value of the 5th resistance includes
27.4 kilo-ohms.
Preferably, the adjustment module includes: the 6th resistance, the 7th resistance, the 8th resistance and triode, and the described 6th
Resistance, the 7th resistance and the 8th resistance be sequentially connected in series the triode emitter and ground reference it
Between, the base stage of the triode receives the rectified signal, the collector of the triode and the 7th resistance, the described 8th
Intermediate node between resistance is connected, and the intermediate node between the 6th resistance and the 7th resistance exports the positive
Power supply signal.
It includes 6.34 kilo-ohms, described that the preferably described triode, which includes PNP type triode, the resistance value of the 6th resistance,
The resistance value of seven resistance includes 287 kilo-ohms, the resistance value of the 8th resistance includes 500 Europe.
Preferably, the output module includes: booster circuit, for generating the forward direction for telecommunications according to reference voltage
Number；And negater circuit, it is connected with the booster circuit, for generating the reverse power supply signal according to the reference voltage,
Wherein, the voltage value of the voltage value of the reverse power supply signal and the positive power supply signal is adjusted in synchronism.
Preferably, the main road unit includes: third operational amplifier, four-operational amplifier, the 9th resistance, the tenth electricity
Resistance, eleventh resistor, twelfth resistor, thirteenth resistor and the 14th resistance, the positive of the third operational amplifier supply
The positive feeder ear of electric end and the four-operational amplifier receives the positive power supply signal, the third operation amplifier respectively
The reverse power supply end of device and the reverse power supply end of the four-operational amplifier receive the reverse phase power supply signal respectively, and described the
The first ends of nine resistance receives the input signal, and the second end of the 9th resistance is reversed with the third operational amplifier
Input terminal is connected, and the tenth resistance, the eleventh resistor and the twelfth resistor are sequentially connected in series in three operation
Between the inverting input terminal of amplifier and the output end of the four-operational amplifier, and in the four-operational amplifier
Output end generates the output signal, and the thirteenth resistor is connected on the positive input and ginseng of the third operational amplifier
Examine between ground potential, the 14th resistance be connected on the four-operational amplifier positive input and ground reference it
Between, the output end of the third operational amplifier is connected with the intermediate node of the tenth resistance, the eleventh resistor, described
The reverse input end of four-operational amplifier is connected with the intermediate node of the eleventh resistor, the twelfth resistor.
The signal generating circuit provided according to embodiments of the present invention provides positive to main circuit unit by power supply unit and supplies
Electric signal and reverse phase power supply signal generate sine wave signal output according to input signal by main circuit unit, with the prior art
It compares, under normal power supply state, the instantaneous voltage value of positive power supply signal is higher than the signal generating circuit of the embodiment of the present invention
The instantaneous voltage value of output signal, the instantaneous voltage value of reverse phase power supply signal are lower than the instantaneous voltage value of output signal, and
In each positive half period of output signal, positive power supply signal is consistent with the variation tendency of output signal, in the every of output signal
In a negative half-cycle, reverse phase power supply signal is consistent with the variation tendency of output signal, to solve the problems, such as high power consumption.
Detailed description of the invention
By referring to the drawings to the description of the embodiment of the present invention, above-mentioned and other purposes feature of the invention and excellent
Point will be apparent from.
Fig. 1 shows the signal waveform schematic diagram of the PDLC driving circuit of the prior art.
Fig. 2 shows the schematic block diagrams of the signal generating circuit of the embodiment of the present invention.
Fig. 3 shows the ideal waveform signal schematic diagram of the signal generating circuit of the embodiment of the present invention.
Fig. 4 shows the structural schematic diagram of power supply unit in Fig. 2.
Fig. 5 shows the electrical block diagram of rectification module in Fig. 4.
Fig. 6 shows the signal waveform schematic diagram of rectification module in Fig. 5.
Fig. 7 shows the electrical block diagram of adjustment module and output module in Fig. 4.
Fig. 8 shows the electrical block diagram of main control unit in Fig. 2.
Fig. 9 shows the actual signal waveform diagram of the signal generating circuit of the embodiment of the present invention.
Specific embodiment
Hereinafter reference will be made to the drawings, and the present invention will be described in more detail.In various figures, identical element is using similar attached
Icon is remembered to indicate.For the sake of clarity, the various pieces in attached drawing are not necessarily to scale.Furthermore, it is possible to be not shown certain
Well known part.
Many specific details of the invention are described hereinafter, to be more clearly understood that the present invention.But as this
The technical staff in field it will be appreciated that as, can not realize the present invention according to these specific details.
Fig. 2 shows the schematic block diagram of the signal generating circuit of the embodiment of the present invention, Fig. 3 shows the embodiment of the present invention
The ideal waveform signal schematic diagram of signal generating circuit.
As shown in Figure 2 and Figure 3, the signal generating circuit of the embodiment of the present invention includes power supply unit 110 and main circuit unit
120。
Power supply unit 110 is used to provide positive power supply signal VS+ and reverse phase power supply signal VS-, and according to input signal
Vin1 adjusts the voltage value of positive power supply signal VS+ and the voltage value of reverse phase power supply signal VS-.
The positive supply end of main circuit unit 120 receives positive power supply signal VS+, the inverting power supplies of main circuit unit 120
End receives reverse phase power supply signal VS-, and main circuit unit 120 generates output signal Vout according to input signal Vin2.Wherein,
Output signal Vout is sine wave, and under normal power supply state, the instantaneous voltage value of positive power supply signal VS+ is higher than output signal
The instantaneous voltage value of Vout, the instantaneous voltage value of reverse phase power supply signal VS- is lower than the instantaneous voltage value of output signal Vout, defeated
Out in each positive half period of signal Vout, positive power supply signal VS+ is consistent with the variation tendency of output signal Vout, and defeated
Out in each negative half-cycle of signal Vout, reverse phase power supply signal VS- is consistent with the variation tendency of output signal Vout.
In the present embodiment, input signal Vin1 is benchmark sinusoidal signal, and input signal Vin2 is sine wave.
In other embodiments, power supply unit 110 also can receive input signal Vin2, instead of input signal Vin1, from
And using input signal Vin2 as reference sinusoidal signal.
Fig. 4 shows the structural schematic diagram of power supply unit in Fig. 2.
As shown in figure 4, power supply unit 110 includes: rectification module 111, adjustment module 112 and output module 113.Rectification
Module 111 carries out full-wave rectification to input signal Vin1 to obtain rectified signal Vmid.Adjustment module 112 is according to positive for telecommunications
Number VS+ generates feedback signal FB, and adjusts feedback signal FB according to rectified signal Vmid.Output module 113 is for generating positive
Power supply signal VS+ and reverse phase power supply signal VS-, and FB adjusts positive power supply signal VS+ and reverse phase for telecommunications based on the feedback signal
The voltage value of number VS-.
Fig. 5 shows the electrical block diagram of rectification module in Fig. 4, and Fig. 6 shows the signal wave of rectification module in Fig. 5
Shape schematic diagram.
As shown in figure 5, rectification module 111 includes: the first operational amplifier OP1, second operational amplifier OP2, diode
D1 (first diode), diode D2 (the second diode), first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance
R4 and the 5th resistance R5.
The positive feeder ear of first operational amplifier OP1 and the positive feeder ear of second operational amplifier OP2 receive first
Reference voltage VGH.The reverse phase feeder ear of first operational amplifier OP1 and the reverse phase feeder ear of second operational amplifier OP2 receive
Second reference voltage VGL.First resistor R1, second resistance R2 and 3rd resistor R3 are sequentially connected in series in the first operational amplifier
Between the inverting input terminal of OP1 and the output end of second operational amplifier OP2, and in the output end of second operational amplifier OP2
Obtain rectified signal Vmid.The first end of 4th resistance R4 receives reference sinusoidal signal (such as input signal Vin1).4th electricity
The second end of resistance R4 is connected with the inverting input terminal of the first operational amplifier OP1.5th resistance R5 is connected on the first operation amplifier
Between the inverting input terminal of device OP1 and the cathode of diode D2.The anode of the cathode of diode D1 and diode D2 are respectively with the
The output end of one operational amplifier OP1 is connected.Middle node between the anode and first resistor R1, second resistance R2 of diode D1
Point Q1 is connected.The normal phase input end of first operational amplifier OP1 is connected with ground reference.Second operational amplifier OP2 is just
Phase input terminal is connected with the cathode of diode D2.The inverting input terminal and second resistance R2 of second operational amplifier OP2, third electricity
The intermediate node Q2 hindered between R3 is connected.
In some specific embodiments, the resistance value of first resistor R1 includes 10 kilo-ohms, and the resistance value of second resistance R2 includes
10 kilo-ohms, the resistance value of 3rd resistor R3 includes 30 kilo-ohms, and the resistance value of the 4th resistance R4 includes 10 kilo-ohms, the resistance value of the 5th resistance R5
Including 27.4 kilo-ohms.
However the embodiment of the present invention is not limited to this, those skilled in the art, which can according to need, carries out it to above-mentioned parameter
He is arranged.
Fig. 7 shows the electrical block diagram of adjustment module and output module in Fig. 4.
As shown in fig. 7, adjustment module 112 includes: the 6th resistance R6, the 7th resistance R7, the 8th resistance R8 and triode
M1.6th resistance R6, the 7th resistance R7 and the 8th resistance R8 are sequentially connected in series emitter and ground reference in triode M1
Between.The base stage of triode M1 receives rectified signal Vmid.The collector of triode M1 and the 7th resistance R7, the 8th resistance R8 it
Between intermediate node Q3 be connected.Intermediate node Q4's between 6th resistance R6 and the 7th resistance R7 and positive power supply signal VS+
Output end is connected.
In some specific embodiments, triode M1 include PNP type triode, the resistance value of the 6th resistance R6 include 6.34
Kilo-ohm, the resistance value of the 7th resistance R7 include 287 kilo-ohms, the resistance value of the 8th resistance R8 includes 500 Europe.
However the embodiment of the present invention is not limited to this, those skilled in the art, which can according to need, carries out it to above-mentioned parameter
He is arranged.
Output module 113 includes: driving chip U1, fuse F1, inductance L1, diode D3, diode D4, diode
D5, multiple capacitor C1 to C5, the 15th resistance R15 and the 16th resistance R16.
Driving chip U1 includes overvoltage protection end OVP (its detection threshold value is 1.2V), feedback end FB, filtering end DMIC and (uses
In pwm signal is filtered into DC voltage), ground terminal GND, booster converter switching node LX, power input VIN, light modulation
Control signal PWM, enable end EN (when EN receives high level when enable end, driving chip U1 starts to work) and exposed weldering
Disk EPAD (for driving chip U1 to be welded to printed circuit board, is connected to simulation ground, to obtain maximum dissipation power consumption).
Enable end EN and brightness adjustment control input terminal PWM receives reference voltage VDD.Fuse F1 and inductance L1 is connected on enabled
It holds between EN and the anode of diode D3.Intermediate node Q5 and power input VIN between fuse F1 and inductance L1 are connected.
Capacitor C1 is connected between intermediate node Q5 and ground reference.Intermediate node Q6 and boosting between inductance L1 and diode D3
Converter switches node LX is connected.Exposed pads EPAD, ground terminal GND are connected with ground reference respectively.Capacitor C2 is serially connected in
Between the cathode and ground reference of diode D3.15th resistance R15 and the 16th resistance R16 are sequentially connected in series in diode D3
Cathode and ground reference between.Positive power supply signal VS+ is exported in the cathode of diode D3.Capacitor C3 is serially connected in filtering end
Between DMIC and ground reference.Intermediate node Q7 and overvoltage protection end between 15th resistance R15 and the 16th resistance R16
OVP connection.Feedback end FB is connected with intermediate node Q3.Capacitor C4 is concatenated between intermediate node Q6 and the cathode of diode D4.?
The anode of diode D4 exports reverse phase power supply signal VS-.Capacitor C5 is serially connected between the anode and ground reference of diode D4.
Diode D5 is serially connected between the cathode and ground reference of diode D4.
Driving chip U1, inductance L1 and diode D3 constitute booster circuit (Boost), for according to reference voltage VDD
Generate positive power supply signal VS+.Diode D4, diode D5 and capacitor C4 constitute negater circuit, for according to reference voltage
VDD generates reverse power supply signal VS-, and negater circuit is connected by intermediate node Q6 with booster circuit, so that reverse power supply signal
The voltage value of the voltage value of VS- and positive power supply signal VS+ are adjusted in synchronism.
In some specific embodiments, reference voltage 3.3V；The breakdown voltage of fuse F1 is 32V, blowout current
For 0.75A；Inductance is 10 μ H；Resistance R15 is 237 kilo-ohms；Resistance R16 is 9.76 kilo-ohms；Capacitor C1 is that three capacitors are in parallel
Equivalent capacity, three capacitors are respectively 0.1 μ F, 2.2 μ F, 2.2 μ F；Capacitor C2 be three capacitor parallel connections equivalent capacity, three
Capacitor is respectively 0.1 μ F, 2.2 μ F, 2.2 μ F；Capacitor C3 is 10nF；Capacitor C4 is 1 μ F；Capacitor C5 be two capacitors it is in parallel etc.
Capacitor is imitated, two capacitors are respectively 0.1 μ F, 2.2 μ F；The protection voltage of overvoltage protection end OVP is (1+R15/R16) * 1.2V.
However the embodiment of the present invention is not limited to this, those skilled in the art, which can according to need, carries out it to above-mentioned parameter
He is arranged.
Fig. 8 shows the electrical block diagram of main control unit in Fig. 2.
As shown in figure 8, main road unit 120 includes: third operational amplifier OP3, four-operational amplifier OP4, the 9th electricity
Hinder R9, the tenth resistance R10, eleventh resistor R11, twelfth resistor R12, thirteenth resistor R13 and the 14th resistance R14.
The positive feeder ear and the positive feeder ear of four-operational amplifier OP4 of third operational amplifier OP3 receives respectively
Positive power supply signal VS+.The reverse phase feeder ear of third operational amplifier OP3 and the reverse phase feeder ear of four-operational amplifier OP4
Reverse phase power supply signal VS- is received respectively.The first end of 9th resistance R9 receives input signal Vin2.The second end of 9th resistance R9
It is connected with the inverting input terminal of third operational amplifier OP3.Tenth resistance R10, eleventh resistor R11 and twelfth resistor
R12 is sequentially connected in series between the inverting input terminal of third operational amplifier OP3 and the output end of four-operational amplifier OP4, and
And output signal Vout is generated in the output end of four-operational amplifier OP4.Thirteenth resistor R13 is connected on third operation amplifier
Between the normal phase input end and ground reference of device OP3.14th resistance R14 is connected on the positive of four-operational amplifier OP4
Between input terminal and ground reference.The output end and the tenth resistance R10 of third operational amplifier OP3, eleventh resistor R11
Intermediate node Q8 is connected, in the reverse input end and eleventh resistor R11, twelfth resistor R12 of four-operational amplifier OP4
Intermediate node is connected Q9.
In some specific embodiments, the resistance value of the 9th resistance R9 includes 20 kilo-ohms, and the resistance value of the tenth resistance R10 includes
68 kilo-ohms, the resistance value of eleventh resistor R11 includes 20 kilo-ohms, and the resistance value of twelfth resistor R12 includes 20 kilo-ohms, thirteenth resistor
The resistance value of R13 includes 20 kilo-ohms, and the resistance value of the 14th resistance R14 includes 20 kilo-ohms.
However the embodiment of the present invention is not limited to this, those skilled in the art, which can according to need, carries out it to above-mentioned parameter
He is arranged.
Circuit theory of the invention is described in detail below in conjunction with Fig. 3 to Fig. 8.Point input signal Vin1 is in just
Half period, negative half-cycle two stages carry out discussed below:
In rectification module 111, when Vin1 is in positive half period, the cut-off of diode D2 reverse phase, the positive skew of diode D1
It sets, the first operational amplifier OP1 and second operational amplifier OP2 work in reverse phase proportioner state, at this point, the first operation is put
The positive of the voltage V1P of normal phase input end and the voltage V1N of inverting input terminal and second operational amplifier OP2 of big device OP1
The voltage V2P of input terminal is 0V, and the amplification factor β 1 of the first operational amplifier OP1 can be obtained by equation (1):
Wherein, R1 is 10 kilo-ohms, and R4 is 10 kilo-ohms, and amplification factor β 1 is -1.
The amplification factor β 2 of second operational amplifier OP2 can be obtained by equation (2):
Wherein, R2 is 10 kilo-ohms, and R3 is 30 kilo-ohms, and amplification factor β 1 is -3.
Rectified signal Vmid can be obtained by equation (3):
Vmid=β 1* β 2*Vin1=3*Vin1 (3)
When Vin1 is in negative half-cycle, diode D2 positive biasing, diode D1 reverse phase cut-off flows through the 4th resistance R4
With the electric current I of the intermediate node Q0 of first resistor R1Q0Equation (4) and equation (5) can be passed through respectively to calculate:
Equation (6) can be obtained by equation (4) and equation (5):
Consider from the first operational amplifier OP1 and second operational amplifier OP2 " empty short ", can obtain equation (7) with etc.
Formula (8):
V1N=V1P=0 (7)
V2N=V2P (8)
Wherein, V2N is the voltage of the inverting input terminal of second operational amplifier OP2, can must be waited by equation (6), (7), (8)
Formula (9):
Wherein, the resistance value of first resistor R1 is 10 kilo-ohms, and the resistance value of second resistance R2 is 10 kilo-ohms, the resistance of the 4th resistance R4
Value is 10 kilo-ohms, and the resistance value of the 5th resistance R5 is 27.4 kilo-ohms, and the resistance value of R1, R2, R4, R5, which are substituted into equation (9), can obtain equation
(10):
V2P=V2N=-1.156*Vinl (10)
Flow through the electric current I of the intermediate node Q1 of first resistor R1 and second resistance R2Q1Can pass through respectively equation (11) with
Equation (12) calculates:
Wherein, VQ1For the voltage of intermediate node Q1.
Equation (13) can be obtained by equation (11) and (12):
Equation (14) can be obtained by equation (13) and (7):
Wherein, the resistance value of first resistor R1 is 10 kilo-ohms, and the resistance value of second resistance R2 is 10 kilo-ohms, by the resistance value of R1, R2
Substitute into equation (14) and combine can equation (10) equation (15):
VQ1=0.5*V2N=-0.578*Vin1 (15)
Consider from second operational amplifier OP2 " void is disconnected ", flows through the intermediate node Q2 of second resistance R2 Yu 3rd resistor R3
Electric current IQ2Equation (16) and equation (17) can be passed through respectively to calculate:
Equation (18) can be obtained by equation (16) and (17):
Equation (19) can be obtained by equation (18):
Wherein, the resistance value of second resistance R2 is 10 kilo-ohms, and the resistance value of 3rd resistor R3 is 30 kilo-ohms, by the resistance value of R2, R3
Substitute into equation (19) and combine can equation (14) and (15) equation (20):
Vmid=-2.89*Vinl (20)
The voltage range of input signal Vin1 is -6V to+6V in the present embodiment, and the voltage range of rectified signal Vmid is
0V to+18V, as shown in Figure 6.
In adjustment module 112, during the voltage of rectified signal Vmid rises to+18V from 0V, triode M1's
Emitter voltage rises with the voltage of Vmid and is risen, and the electric current of emitter pole reduces, equivalent between collector and emitter
Resistance REC increases, and equivalent resistance resistance R7 in parallel with resistance R2, resistance REC ((R6+RCE) //R7) increases, by equation (21)
Positive power supply signal VS+ can be obtained:
Wherein, since equivalent resistance ((R6+RCE) //R7) increases, positive power supply signal VS+ increases.
During the voltage of rectified signal Vmid drops to 0V from+18V, the emitter voltage of triode M1 is with Vmid
Voltage decline and decline, the electric current of emitter increases, the equivalent resistance REC reduction between collector and emitter, equivalent electricity
It hinders ((R6+RCE) //R7) to reduce, positive power supply signal VS+ can be obtained by equation (21) and reduced.
In the process, driving chip U1 receives feedback signal (voltage and/or electricity including collector by feedback end FB
Stream) signal that adjusts booster converter switching node LX, so that the voltage of reverse phase power supply signal VS- and positive power supply signal
The voltage synchronous of VS+ is adjusted.
In main circuit unit 120, input signal Vin2 is through third operational amplifier OP3 and four-operational amplifier OP4
Output signal Vout is generated, since input signal Vin2 is sinusoidal signal, through the amplified output signal Vout of operational amplifier
It also is sinusoidal signal.
Fig. 9 shows the actual signal waveform diagram of the signal generating circuit of the embodiment of the present invention.
As shown in figure 9, output signal Vout is sine wave, under normal power supply state, positive power supply signal VS+'s is instantaneous
Voltage value is higher than the instantaneous voltage value of output signal Vout, and the instantaneous voltage value of reverse phase power supply signal VS- is lower than output signal
The instantaneous voltage value of Vout, in each positive half period of output signal Vout, positive power supply signal VS+ and output signal Vout
Variation tendency it is consistent, and in each negative half-cycle of output signal Vout, reverse phase power supply signal VS- and output signal Vout
Variation tendency it is consistent, in the present embodiment, the range of the positive supply voltage VS+ generated through output module 113 +6.7V extremely
Between+24.3V, the range of inverting power supplies voltage VS- is between -24.5V to -9.1V.Compared with prior art, letter of the invention
The power consumption of number generation circuit can reduce 85mW.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
It is as described above according to the embodiment of the present invention, these embodiments details all there is no detailed descriptionthe, also not
Limiting the invention is only the specific embodiment.The foregoing is merely illustrative of the preferred embodiments of the present invention, and does not have to limit
Or else the system present invention, any person skilled in the art are detached within the scope of technical solution of the present invention, take off when using above-mentioned
The technology contents shown make it is a little change or modification etc., it is done within the spirit and principles of the present invention it is any modification, etc.
With replacement or improvement etc., should all be included in the protection scope of the present invention.This specification is chosen and specifically describes these implementations
Example, is principle and practical application in order to better explain the present invention, to enable skilled artisan well
Modification using the present invention and on the basis of the present invention uses.
Claims (10)
1. a kind of signal generating circuit characterized by comprising
Power supply unit provides positive power supply signal and reverse phase power supply signal；And
Main circuit unit generates output signal according to input signal, and the output signal is sine wave, the main circuit unit
Positive supply end receives the positive power supply signal, and the inverting power supplies end of the main circuit unit receives the reverse phase for telecommunications
Number,
Wherein, the instantaneous voltage value of the positive power supply signal is higher than the instantaneous voltage value of the output signal, and the reverse phase supplies
The instantaneous voltage value of electric signal is lower than the instantaneous voltage value of the output signal,
In each positive half period of the output signal, the variation tendency one of the positive power supply signal and the output signal
It causes, and in each negative half-cycle of the output signal, the variation tendency of the reverse phase power supply signal and the output signal
Unanimously.
2. signal generating circuit according to claim 1, which is characterized in that said supply unit is according to reference sinusoidal signal
Adjust the voltage value of the positive power supply signal and the voltage value of the reverse phase power supply signal.
3. signal generating circuit according to claim 2, which is characterized in that the input signal is sine wave, the confession
Electric unit receives the input signal, using the input signal as the reference sinusoidal signal.
4. signal generating circuit according to claim 3, which is characterized in that said supply unit includes:
Rectification module carries out full-wave rectification to the input signal or reference sinusoidal signal to obtain rectified signal；
Adjustment module adjusts feedback signal according to the rectified signal；And
Output module, for generating the positive power supply signal and the reverse phase power supply signal, and according to the feedback signal tune
Save the voltage value of the positive power supply signal Yu the reverse phase power supply signal.
5. signal generating circuit according to claim 4, which is characterized in that the rectification module includes: that the first operation is put
Big device, second operational amplifier, first diode, the second diode, first resistor, second resistance, 3rd resistor, the 4th resistance
And the 5th resistance,
The positive feeder ear of first operational amplifier and the positive feeder ear of the second operational amplifier receive the first ginseng
Voltage is examined, the reverse phase feeder ear of first operational amplifier and the reverse phase feeder ear of the second operational amplifier receive second
Reference voltage,
The first resistor, the second resistance and the 3rd resistor are sequentially connected in series in the anti-of first operational amplifier
Between phase input terminal and the output end of the second operational amplifier, and institute is obtained in the output end of the second operational amplifier
Rectified signal is stated,
The first end reception input signal of 4th resistance or the reference sinusoidal signal, the second of the 4th resistance
End is connected with the inverting input terminal of first operational amplifier,
5th resistance be connected on first operational amplifier inverting input terminal and second diode cathode it
Between,
The anode output with first operational amplifier respectively of the cathode of the first diode and second diode
End is connected, and the intermediate node between the anode of the first diode and the first resistor, the second resistance is connected,
The normal phase input end of first operational amplifier is connected with ground reference, and the positive of the second operational amplifier is defeated
Enter end to be connected with the cathode of second diode, the inverting input terminal of the second operational amplifier and the second resistance,
Intermediate node between the 3rd resistor is connected.
6. signal generating circuit according to claim 5, which is characterized in that the resistance value of the first resistor includes 10,000
Europe, the resistance value of the second resistance include 10 kilo-ohms, and the resistance value of the 3rd resistor includes 30 kilo-ohms, the resistance of the 4th resistance
Value includes 10 kilo-ohms, and the resistance value of the 5th resistance includes 27.4 kilo-ohms.
7. signal generating circuit according to claim 4, which is characterized in that the adjustment module includes: the 6th resistance,
Seven resistance, the 8th resistance and triode,
6th resistance, the 7th resistance and the 8th resistance are sequentially connected in series emitter and ginseng in the triode
It examines between ground potential,
The base stage of the triode receives the rectified signal,
Intermediate node between the collector of the triode and the 7th resistance, the 8th resistance is connected,
Intermediate node between the 6th resistance and the 7th resistance exports the positive power supply signal.
8. signal generating circuit according to claim 7, which is characterized in that the triode includes PNP type triode, institute
The resistance value for stating the 6th resistance includes 6.34 kilo-ohms, the resistance value of the 7th resistance includes the resistance value of 287 kilo-ohms, the 8th resistance
Including 500 Europe.
9. signal generating circuit according to claim 4, which is characterized in that the output module includes:
Booster circuit, for generating the positive power supply signal according to reference voltage；And
Negater circuit is connected with the booster circuit, for generating the reverse power supply signal according to the reference voltage,
Wherein, the voltage value of the voltage value of the reverse power supply signal and the positive power supply signal is adjusted in synchronism.
10. -9 any signal generating circuit according to claim 1, which is characterized in that the main road unit includes: third
Operational amplifier, four-operational amplifier, the 9th resistance, the tenth resistance, eleventh resistor, twelfth resistor, thirteenth resistor
And the 14th resistance,
The positive feeder ear of the third operational amplifier and the positive feeder ear of the four-operational amplifier receive institute respectively
State positive power supply signal, the reverse power supply end of the third operational amplifier and the reverse power supply end of the four-operational amplifier
The reverse phase power supply signal is received respectively,
The first end of 9th resistance receives the input signal, and second end and the third operation of the 9th resistance are put
The reverse input end of big device is connected,
Tenth resistance, the eleventh resistor and the twelfth resistor are sequentially connected in series in three operational amplifier
Between inverting input terminal and the output end of the four-operational amplifier, and produced in the output end of the four-operational amplifier
The raw output signal,
The thirteenth resistor is connected between the positive input and ground reference of the third operational amplifier, and described
14 resistance are connected between the positive input and ground reference of the four-operational amplifier,
The output end of the third operational amplifier is connected with the intermediate node of the tenth resistance, the eleventh resistor, institute
The reverse input end for stating four-operational amplifier is connected with the intermediate node of the eleventh resistor, the twelfth resistor.
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| CN201910396656.2A CN110264968B (en) | 2019-05-14 | 2019-05-14 | Signal generating circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112713879A (en) * | 2020-12-18 | 2021-04-27 | 苏州浪潮智能科技有限公司 | Signal correction circuit and server |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06216856A (en) * | 1993-01-19 | 1994-08-05 | Mitsubishi Electric Corp | Timing extracting circuit |
| JP2008099408A (en) * | 2006-10-11 | 2008-04-24 | Shindengen Electric Mfg Co Ltd | Inverter device |
| CN201550041U (en) * | 2009-10-30 | 2010-08-11 | 西安森派电子技术有限公司 | Dc/ac converter |
| CN102447849A (en) * | 2011-09-06 | 2012-05-09 | 中国科学院长春光学精密机械与物理研究所 | System for realizing EMCCD signal driving by high-voltage operational amplifier |
| CN102647820A (en) * | 2011-02-18 | 2012-08-22 | 海洋王照明科技股份有限公司 | LED (light emitting diode) drive circuit |
| CN102857200A (en) * | 2012-09-17 | 2013-01-02 | 北京经纬恒润科技有限公司 | Signal waveform converting circuit |
| CN104333934A (en) * | 2013-07-22 | 2015-02-04 | 四川新力光源股份有限公司 | LED illumination driving circuit |
-
2019
- 2019-05-14 CN CN201910396656.2A patent/CN110264968B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06216856A (en) * | 1993-01-19 | 1994-08-05 | Mitsubishi Electric Corp | Timing extracting circuit |
| JP2008099408A (en) * | 2006-10-11 | 2008-04-24 | Shindengen Electric Mfg Co Ltd | Inverter device |
| CN201550041U (en) * | 2009-10-30 | 2010-08-11 | 西安森派电子技术有限公司 | Dc/ac converter |
| CN102647820A (en) * | 2011-02-18 | 2012-08-22 | 海洋王照明科技股份有限公司 | LED (light emitting diode) drive circuit |
| CN102447849A (en) * | 2011-09-06 | 2012-05-09 | 中国科学院长春光学精密机械与物理研究所 | System for realizing EMCCD signal driving by high-voltage operational amplifier |
| CN102857200A (en) * | 2012-09-17 | 2013-01-02 | 北京经纬恒润科技有限公司 | Signal waveform converting circuit |
| CN104333934A (en) * | 2013-07-22 | 2015-02-04 | 四川新力光源股份有限公司 | LED illumination driving circuit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112713879A (en) * | 2020-12-18 | 2021-04-27 | 苏州浪潮智能科技有限公司 | Signal correction circuit and server |
| CN112713879B (en) * | 2020-12-18 | 2022-06-03 | 苏州浪潮智能科技有限公司 | Signal correction circuit and server |
| WO2022127290A1 (en) * | 2020-12-18 | 2022-06-23 | 苏州浪潮智能科技有限公司 | Signal correction circuit and server |
| US11942949B2 (en) | 2020-12-18 | 2024-03-26 | Inspur Suzhou Intelligent Technology Co., Ltd. | Signal correction circuit and server |
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| CN110264968B (en) | 2021-11-02 |
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