CN104967315A - Low-pass filtering amplification peak-clipping pulse wave modulation system based on step-down type constant current - Google Patents
Low-pass filtering amplification peak-clipping pulse wave modulation system based on step-down type constant current Download PDFInfo
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- CN104967315A CN104967315A CN201510323637.9A CN201510323637A CN104967315A CN 104967315 A CN104967315 A CN 104967315A CN 201510323637 A CN201510323637 A CN 201510323637A CN 104967315 A CN104967315 A CN 104967315A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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Abstract
The invention discloses a low-pass filtering amplification peak-clipping pulse wave modulation system based on a step-down type constant current, and the system consists of a peak-clipping circuit, a pulse wave modulation circuit connected with the output end of the peak-clipping circuit, a two-stage low-pass filtering amplification circuit connected with the output end of the pulse wave modulation circuit, and a linear drive circuit connected between the peak-clipping circuit and the pulse wave modulation circuit. The system is characterized in that the system is also provided with a step-down type constant current circuit which is connected with the peak-clipping circuit, the pulse wave modulation circuit and the two-stage low-pass filtering amplification circuit. Through the effect of the step-down type constant current circuit, the system can provide stable voltage and current, prevents an electric appliance from affecting the using effect and service life because of an unstable voltage.
Description
Technical field
The present invention relates to electronic applications, specifically refer to that a kind of low-pass filtering based on voltage-dropping type constant current amplifies peak clipping pulse wave modulation system.
Background technology
Being applied in social production and human lives of electric energy is more and more universal, and the electrical equipment adapting to various difference requirement also constantly occurs, in life, people use pulse wave modulation circuit to come to electric power supply usually, to meet the use of people to electrical equipment.But in actual use, the power that pulse wave modulation circuit exports is not high, and its voltage exported, electric current and instability, the electrical equipment demand that people increase day by day can not be met.
Summary of the invention
The object of the invention is to overcome that the power that traditional pulse wave circuit exports is not high, voltage, electric current unstable, the defect of the electrical equipment demand that people increase day by day can not be met, provide a kind of low-pass filtering based on voltage-dropping type constant current to amplify peak clipping pulse wave modulation system.
Object of the present invention is achieved through the following technical solutions: the low-pass filtering based on voltage-dropping type constant current amplifies peak clipping pulse wave modulation system, by peak-clipping circuit, the pulse wave modulation circuit be connected with peak-clipping circuit output, the two-stage low-pass filtering amplifying circuit be connected with pulse wave modulation circuit output, be arranged on the linear drive circuit between peak-clipping circuit and pulse wave modulation circuit, and the voltage-dropping type constant current circuit be all connected with peak-clipping circuit, pulse wave modulation circuit and two-stage low-pass filtering amplifying circuit respectively forms.Described voltage-dropping type constant current electrical route step-down chip U3, triode VT9, triode VT10, amplifier P2, P pole is in turn through electric capacity C13, resistance R22, resistance R21, be connected with the REG pin of step-down chip U3 after electric capacity C14, the diode D8 that N pole is connected with the FSET pin of step-down chip U3 after resistance R23, positive pole is connected with the OUT pin of step-down chip U3 after resistance R24, the electric capacity C15 that negative pole is connected with the BST pin of step-down chip U3 after resistance R25, P pole is connected with the electrode input end of amplifier P2 after resistance R26, the diode D9 that N pole is connected with the base stage of triode VT9 after inductance L, positive pole is connected with the electrode input end of amplifier P2, the electric capacity C16 that negative pole is connected with the emitter of triode VT9 after resistance R27, negative pole is in turn through resistance R29, be connected with the base stage of triode VT9 after resistance R28, the electric capacity C17 that positive pole is connected with the collector electrode of triode VT10, and one end is connected with the negative input of amplifier P2, the resistance R20 that the other end is connected with the emitter of triode VT10 forms, the VDD pin of described step-down chip U3 is connected with the tie point of diode D8 with resistance R23, and its FB pin is then connected with the output of amplifier P2, its GND pin ground connection, the grounded collector of described triode VT9, the base stage of described triode VT10 is connected with the negative pole of electric capacity C16, the P pole of described diode D8 is connected with two-stage low-pass filtering amplifying circuit, its N pole is then connected with peak-clipping circuit, meanwhile, the base stage of triode VT9 is then connected with pulse wave modulation circuit, and the N pole of diode D9 is also connected with the positive pole of electric capacity C15.
Described linear drive circuit is by driving chip U2, triode VT5, triode VT6, triode VT7, triode VT8, positive pole is connected with peak-clipping circuit, the polar capacitor C10 that negative pole is connected with the IN1 pin of driving chip U2 after resistance R13, one end is connected with the collector electrode of triode VT5, the resistance R14 that the other end is connected with the base stage of triode VT7 after resistance R15, positive pole is connected with the base stage of triode VT5, the polar capacitor C12 that negative pole is connected with the IN1 pin of driving chip U2, positive pole is connected with the IN2 pin of driving chip U2, the polar capacitor C11 of minus earth, one end is connected with the emitter of triode VT5, the resistance R17 that the other end is connected with the base stage of triode VT6, one end is connected with the base stage of triode VT6, the resistance R16 that the other end is connected with the base stage of triode VT7, N pole is connected with the collector electrode of triode VT5, the diode D6 that P pole is connected with the collector electrode of triode VT6, positive terminal is connected with the collector electrode of triode VT5, the not gate K that end of oppisite phase is connected with triode VT8 collector electrode, one end is connected with triode VT8 emitter, the resistance R19 that the other end is connected with the emitter of triode VT7 after resistance R18, and the end of oppisite phase of P pole NAND gate K is connected, the diode D7 that N pole is connected with the tie point of resistance R19 with resistance R18 forms, the VCC pin of described driving chip U2 is connected with the base stage of triode VT5, END pin ground connection, OUT pin are connected with the collector electrode of triode VT6, the collector electrode of triode VT6 is also connected with the base stage of triode VT8, its emitter is connected with the base stage of triode man VT7, the grounded collector of triode VT7, the N pole of diode D7 is connected with pulse wave modulation circuit.
Described peak-clipping circuit is by triode VT1, triode VT2, P pole after resistance R1 as an input of system, the diode D1 that N pole is connected with the base stage of triode VT1, P pole after resistance R2 as another input of system, the diode D2 that N pole is connected with the base stage of triode VT1, one end is connected with the base stage of triode VT1, the resistance R3 that the other end is connected with the base stage of triode VT2, N pole is connected with the P pole of diode D2, the diode D3 that P pole is connected with the base stage of triode VT2, N pole is connected with the P pole of diode D1, the diode D4 that P pole is connected with the base stage of triode VT2, one end is connected with the emitter of triode VT1, the resistance R4 that the other end is connected with pulse wave modulation circuit, one end is connected with the emitter of triode VT2, the resistance R5 that the other end is connected with the positive pole of electric capacity C10 forms, described triode VT1 is all connected with pulse wave modulation circuit with the collector electrode of triode VT2, and the base stage of its triode VT2 is then connected with the N pole of diode D9.
Described pulse wave modulation circuit is by oscillating circuit, and the commutation circuit be connected with output end of oscillating circuit forms; Described oscillating circuit is by oscillator U, positive pole is connected with the BD pin of oscillator U after polar capacitor C2, negative pole after polar capacitor C3 with the not gate A1 that N pole is connected, output is connected with commutation circuit of diode D7, the polar capacitor C1 that positive pole is connected with resistance R4, negative pole is connected with two-stage low-pass filtering amplifying circuit forms; The GND pin ground connection of described oscillator U, VDD pin are connected with the negative pole of polar capacitor C1, FB pin is all connected with commutation circuit with CS pin, BD pin is connected with the collector electrode of triode VT1, and the positive pole of not gate A1 is also connected with the collector electrode of triode VT2.
Described commutation circuit is by trigger U1, the inverting amplifier D5 that P pole is connected with the CS pin of oscillator U, N pole is connected with the CK pin of trigger U1, the not gate A2 that negative pole is connected with the N pole of inverting amplifier D5, positive pole is connected with the Q pin of trigger U1, output is connected with the base stage of triode VT9 forms.The output of the CK pin NAND gate A1 of described trigger U1 is connected, D pin is connected with the FB pin of oscillator U.
Described two-stage low-pass filtering amplifying circuit is by amplifier P1, amplifier P2, triode VT3, triode VT4, positive pole is connected with the electrode input end of amplifier P1 after resistance R6, the polar capacitor C4 of minus earth, positive pole is connected with amplifier P1 negative input after resistance R7, the polar capacitor C5 that negative pole is connected with the negative pole of polar capacitor C4, be serially connected in the polar capacitor C6 between the output of amplifier P1 and negative input, negative pole is connected with the output of amplifier P1, the polar capacitor C7 that positive pole is connected with the base stage of triode VT4, one end is connected with the collector electrode of triode VT4, the resistance R8 that the other end is connected with the emitter of triode VT3, positive pole is connected with the base stage of triode VT3 after resistance R9, the polar capacitor C8 that negative pole is connected with the negative pole of polar capacitor C6 and the negative pole of electric capacity C1 simultaneously, one end is connected with the positive pole of polar capacitor C8, the resistance R11 that the other end is connected with the negative input of amplifier P2, the resistance R10 be in parallel with resistance R11, be serially connected in the polar capacitor C9 between the output of amplifier P2 and negative input, and the resistance R12 be serially connected between the electrode input end of amplifier P2 and output forms, as an output of system while the emitter of described triode VT4 is connected with polar capacitor C6 negative pole, the collector electrode of triode VT3 is connected with the electrode input end of amplifier P2, and the output of amplifier P2 is as another output of system, the electrode input end of described amplifier P1 is connected with the P pole of diode D8.
For guaranteeing result of use, driving chip U2 of the present invention adopts LM387 integrated chip, and step-down chip U3 adopts A718EGT integrated chip.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention adopts two-stage low-pass filtering amplifying circuit, and it can amplify the power output of modulation system, the demand making system can meet more electrical equipment simultaneously to use.
(2) the present invention is by the effect of voltage-dropping type constant current circuit, can provide stable voltage, electric current, prevent electrical equipment from affecting result of use and useful life because of spread of voltage.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is the overall structure schematic diagram of linear drive circuit of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, the present invention is by peak-clipping circuit, the pulse wave modulation circuit be connected with peak-clipping circuit output, the two-stage low-pass filtering amplifying circuit be connected with pulse wave modulation circuit output, be arranged on the Linear Driving electricity between peak-clipping circuit and pulse wave modulation circuit, and the voltage-dropping type constant current circuit be connected with peak-clipping circuit, pulse wave modulation circuit and two-stage low-pass filtering amplifying circuit respectively forms.
Wherein, voltage-dropping type constant current electrical route step-down chip U3, triode VT9, triode VT10, amplifier P2, resistance R20, resistance R21, resistance R22, resistance R23, resistance R24, resistance R25, resistance R26, resistance R27, resistance R28, resistance R29, electric capacity C13, electric capacity C14, electric capacity C15, electric capacity C16, electric capacity C17, diode D8, and diode D9 forms.
When this circuit connects, the P pole of diode D8 is connected with the REG pin of step-down chip U3 in turn after electric capacity C13, resistance R22, resistance R21, electric capacity C14, N pole is connected with the FSET pin of step-down chip U3 after resistance R23.The positive pole of electric capacity C15 is connected with the OUT pin of step-down chip U3 after resistance R24, negative pole is connected with the BST pin of step-down chip U3 after resistance R25.
Wherein, the P pole of diode D9 is connected with the electrode input end of amplifier P2 after resistance R26, N pole is connected with the base stage of triode VT9 after inductance L.The positive pole of electric capacity C16 is connected with the electrode input end of amplifier P2, negative pole is connected with the emitter of triode VT9 after resistance R27.The negative pole of electric capacity C17 is connected with the base stage of triode VT9 in turn after resistance R29, resistance R28, positive pole is connected with the collector electrode of triode VT10.And one end of resistance R20 is connected with the negative input of amplifier P2, the other end is connected with the emitter of triode VT10.
The VDD pin of described step-down chip U3 is connected with the tie point of diode D8 with resistance R23, and its FB pin is then connected with the output of amplifier P2, its GND pin ground connection; The grounded collector of described triode VT9; The base stage of described triode VT10 is connected with the negative pole of electric capacity C16; The P pole of described diode D8 is connected with two-stage low-pass filtering amplifying circuit, its N pole is then connected with peak-clipping circuit; Meanwhile, the base stage of triode VT9 is then connected with pulse wave modulation circuit, and the N pole of diode D9 is also connected with the positive pole of electric capacity C15.
In order to better implement the present invention, described step-down chip U4 preferentially adopts A718EGT integrated chip to realize, its built-in 2.5A MOS switch; It has Bootstrap, short-circuit protection, owes the functions such as electric locking, open-circuit-protection, overtemperature protection, voltage and current automatic constant, low-power consumption adjustment; A718EGT integrated chip adopts friendly process, and input supply voltage scope is 6 ~ 36V; Its static working current is 625 ~ 900 μ A, and cut-off current is 95 ~ 160 μ A, and constant output current is 2A.
For guaranteeing that the present invention better implements, described electric capacity C13, electric capacity C14, electric capacity C15, electric capacity C16, electric capacity C17 adopt polar capacitor.
As shown in Figure 2, described linear drive circuit by driving chip U2, triode VT5, triode VT6, triode VT7, triode VT8, resistance R13, resistance R14, resistance R15, resistance R16, resistance R17, resistance R18, resistance R19, electric capacity C10, electric capacity C11, electric capacity C12, diode D6, diode D7, and not gate K forms.
During connection, the positive pole of polar capacitor C10 is connected with peak-clipping circuit, negative pole is connected with the IN1 pin of driving chip U2 after resistance R13.One end of resistance R14 is connected with the collector electrode of triode VT5, the other end is connected with the base stage of triode VT7 after resistance R15.The positive pole of polar capacitor C12 is connected with the base stage of triode VT5, negative pole is connected with the IN1 pin of driving chip U2.The positive pole of polar capacitor C11 is connected with the IN2 pin of driving chip U2, minus earth.One end of resistance R17 is connected with the emitter of triode VT5, the other end is connected with the base stage of triode VT6.
One end of resistance R16 is connected with the base stage of triode VT6, the other end is connected with the base stage of triode VT7.The N pole of diode D6 is connected with the collector electrode of triode VT5, P pole is connected with the collector electrode of triode VT6.The positive terminal of not gate K is connected with the collector electrode of triode VT5, end of oppisite phase is connected with triode VT8 collector electrode.One end of resistance R19 is connected with triode VT8 emitter, the other end is connected with the emitter of triode VT7 after resistance R18.The end of oppisite phase of the P pole NAND gate K of diode D7 is connected, N pole is connected with the tie point of resistance R19 with resistance R18.
The VCC pin of described driving chip U2 is connected with the base stage of triode VT5, END pin ground connection, OUT pin are connected with the collector electrode of triode VT6, the collector electrode of triode VT6 is also connected with the base stage of triode VT8, its emitter is connected with the base stage of triode man VT7, the grounded collector of triode VT7, the N pole of diode D7 is connected with pulse wave modulation circuit.
The effect of linear drive circuit, can provide stable voltage, prevents electrical equipment from affecting result of use and useful life because of spread of voltage.In order to ensure implementation result, described driving chip U is preferably LM387 integrated chip, its highly sensitive and low price.
Described peak-clipping circuit is by triode VT1, triode VT2, P pole after resistance R1 as an input of system, the diode D1 that N pole is connected with the base stage of triode VT1, P pole after resistance R2 as another input of system, the diode D2 that N pole is connected with the base stage of triode VT1, one end is connected with the base stage of triode VT1, the resistance R3 that the other end is connected with the base stage of triode VT2, N pole is connected with the P pole of diode D2, the diode D3 that P pole is connected with the base stage of triode VT2, N pole is connected with the P pole of diode D1, the diode D4 that P pole is connected with the base stage of triode VT2, one end is connected with the emitter of triode VT1, the resistance R4 that the other end is connected with pulse wave modulation circuit, one end is connected with the emitter of triode VT2, the resistance R5 that the other end is connected with the positive pole of electric capacity C10 forms.
Described triode VT1 is all connected with pulse wave modulation circuit with the collector electrode of triode VT2, and the base stage of its triode VT2 is then connected with the N pole of diode D9.
Peak-clipping circuit is the most simple form that amplitude limit exports, and its implication the output signal exceeding a certain intensity is pruned or limits.The advantage of peak-clipping circuit is, while restriction exports, absolute gain value does not change, and compared with other classification output limiting circuits, PC circuit provides maximum amplification may.
Described pulse wave modulation circuit is by oscillating circuit, and the commutation circuit be connected with output end of oscillating circuit forms.
Wherein, oscillating circuit is by oscillator U, positive pole is connected with the BD pin of oscillator U after polar capacitor C2, negative pole after polar capacitor C3 with the not gate A1 that N pole is connected, output is connected with commutation circuit of diode D7, the polar capacitor C1 that positive pole is connected with resistance R4, negative pole is connected with two-stage low-pass filtering amplifying circuit forms.
The GND pin ground connection of described oscillator U, VDD pin are connected with the negative pole of polar capacitor C1, FB pin is all connected with commutation circuit with CS pin, BD pin is connected with the collector electrode of triode VT1, and the positive pole of not gate A1 is also connected with the collector electrode of triode VT2.
For guaranteeing better enforcement of the present invention, described oscillator U is SOT23-5 integrated chip, and this chip operating voltage is 0.8 ~ 4V, and lowest starting voltage is 0.8V, and output current is 100 ~ 500mA, and efficiency, higher than 90%, effectively raises the accuracy of system.
Described commutation circuit is by trigger U1, the inverting amplifier D5 that P pole is connected with the CS pin of oscillator U, N pole is connected with the CK pin of trigger U1, the not gate A2 that negative pole is connected with the N pole of inverting amplifier D5, positive pole is connected with the Q pin of trigger U1, output is connected with the base stage of triode VT9 forms.
During enforcement, described trigger U1 is CMD6N07 integrated chip.The output of the CK pin NAND gate A1 of described trigger U1 is connected, D pin is connected with the FB pin of oscillator U.
Described two-stage low-pass filtering amplifying circuit by amplifier P1, amplifier P2, triode VT3, triode VT4, resistance R6, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, polar capacitor C4, polar capacitor C5, polar capacitor C6, polar capacitor C7, polar capacitor C8, and polar capacitor C9 forms.
During connection, the positive pole of polar capacitor C4 is connected with the electrode input end of amplifier P1 after resistance R6, minus earth.The positive pole of polar capacitor C5 is connected with amplifier P1 negative input after resistance R7, negative pole is connected with the negative pole of polar capacitor C4.Between the output that polar capacitor C6 is serially connected in amplifier P1 and negative input.The negative pole of polar capacitor C7 is connected with the output of amplifier P1, positive pole is connected with the base stage of triode VT4.
Wherein, one end of resistance R8 is connected with the collector electrode of triode VT4, the other end is connected with the emitter of triode VT3.The positive pole of polar capacitor C8 is connected with the base stage of triode VT3 after resistance R9, negative pole is connected with the negative pole of polar capacitor C6 and the negative pole of electric capacity C1 simultaneously.One end of resistance R11 is connected with the positive pole of polar capacitor C8, the other end is connected with the negative input of amplifier P2.Resistance R10 and resistance R11 is in parallel.Between the output that polar capacitor C9 is serially connected in amplifier P2 and negative input.And between the resistance R12 electrode input end that is then serially connected in amplifier P2 and output.
As an output of system while the emitter of described triode VT4 is connected with polar capacitor C6 negative pole, the collector electrode of triode VT3 is connected with the electrode input end of amplifier P2, and the output of amplifier P2 is as another output of system; The electrode input end of described amplifier P1 is connected with the P pole of diode D8.
As mentioned above, just the present invention can well be realized.
Claims (6)
1. the low-pass filtering based on voltage-dropping type constant current amplifies peak clipping pulse wave modulation system, by peak-clipping circuit, the pulse wave modulation circuit be connected with peak-clipping circuit output, the two-stage low-pass filtering amplifying circuit be connected with pulse wave modulation circuit output, and the linear drive circuit composition be arranged between peak-clipping circuit and pulse wave modulation circuit, it is characterized in that: be also provided with the voltage-dropping type constant current circuit be connected with peak-clipping circuit, pulse wave modulation circuit and two-stage low-pass filtering amplifying circuit respectively, described voltage-dropping type constant current electrical route step-down chip U3, triode VT9, triode VT10, amplifier P2, P pole is in turn through electric capacity C13, resistance R22, resistance R21, be connected with the REG pin of step-down chip U3 after electric capacity C14, the diode D8 that N pole is connected with the FSET pin of step-down chip U3 after resistance R23, positive pole is connected with the OUT pin of step-down chip U3 after resistance R24, the electric capacity C15 that negative pole is connected with the BST pin of step-down chip U3 after resistance R25, P pole is connected with the electrode input end of amplifier P2 after resistance R26, the diode D9 that N pole is connected with the base stage of triode VT9 after inductance L, positive pole is connected with the electrode input end of amplifier P2, the electric capacity C16 that negative pole is connected with the emitter of triode VT9 after resistance R27, negative pole is in turn through resistance R29, be connected with the base stage of triode VT9 after resistance R28, the electric capacity C17 that positive pole is connected with the collector electrode of triode VT10, and one end is connected with the negative input of amplifier P2, the resistance R20 that the other end is connected with the emitter of triode VT10 forms, the VDD pin of described step-down chip U3 is connected with the tie point of diode D8 with resistance R23, and its FB pin is then connected with the output of amplifier P2, its GND pin ground connection, the grounded collector of described triode VT9, the base stage of described triode VT10 is connected with the negative pole of electric capacity C16, the P pole of described diode D8 is connected with two-stage low-pass filtering amplifying circuit, its N pole is then connected with peak-clipping circuit, meanwhile, the base stage of triode VT9 is then connected with pulse wave modulation circuit, and the N pole of diode D9 is also connected with the positive pole of electric capacity C15.
2. the low-pass filtering based on voltage-dropping type constant current according to claim 1 amplifies peak clipping pulse wave modulation system, it is characterized in that: described linear drive circuit is by driving chip U2, triode VT5, triode VT6, triode VT7, triode VT8, positive pole is connected with peak-clipping circuit, the polar capacitor C10 that negative pole is connected with the IN1 pin of driving chip U2 after resistance R13, one end is connected with the collector electrode of triode VT5, the resistance R14 that the other end is connected with the base stage of triode VT7 after resistance R15, positive pole is connected with the base stage of triode VT5, the polar capacitor C12 that negative pole is connected with the IN1 pin of driving chip U2, positive pole is connected with the IN2 pin of driving chip U2, the polar capacitor C11 of minus earth, one end is connected with the emitter of triode VT5, the resistance R17 that the other end is connected with the base stage of triode VT6, one end is connected with the base stage of triode VT6, the resistance R16 that the other end is connected with the base stage of triode VT7, N pole is connected with the collector electrode of triode VT5, the diode D6 that P pole is connected with the collector electrode of triode VT6, positive terminal is connected with the collector electrode of triode VT5, the not gate K that end of oppisite phase is connected with triode VT8 collector electrode, one end is connected with triode VT8 emitter, the resistance R19 that the other end is connected with the emitter of triode VT7 after resistance R18, and the end of oppisite phase of P pole NAND gate K is connected, the diode D7 that N pole is connected with the tie point of resistance R19 with resistance R18 forms, the VCC pin of described driving chip U2 is connected with the base stage of triode VT5, END pin ground connection, OUT pin are connected with the collector electrode of triode VT6, the collector electrode of triode VT6 is also connected with the base stage of triode VT8, its emitter is connected with the base stage of triode man VT7, the grounded collector of triode VT7, the N pole of diode D7 is connected with pulse wave modulation circuit, described driving chip U2 is LM387 integrated chip.
3. the low-pass filtering based on voltage-dropping type constant current according to claim 2 amplifies peak clipping pulse wave modulation system, it is characterized in that: described peak-clipping circuit is by triode VT1, triode VT2, P pole after resistance R1 as an input of system, the diode D1 that N pole is connected with the base stage of triode VT1, P pole after resistance R2 as another input of system, the diode D2 that N pole is connected with the base stage of triode VT1, one end is connected with the base stage of triode VT1, the resistance R3 that the other end is connected with the base stage of triode VT2, N pole is connected with the P pole of diode D2, the diode D3 that P pole is connected with the base stage of triode VT2, N pole is connected with the P pole of diode D1, the diode D4 that P pole is connected with the base stage of triode VT2, one end is connected with the emitter of triode VT1, the resistance R4 that the other end is connected with pulse wave modulation circuit, one end is connected with the emitter of triode VT2, the resistance R5 that the other end is connected with the positive pole of electric capacity C10 forms, described triode VT1 is all connected with pulse wave modulation circuit with the collector electrode of triode VT2, and the base stage of its triode VT2 is then connected with the N pole of diode D9.
4. the low-pass filtering based on voltage-dropping type constant current according to claim 3 amplifies peak clipping pulse wave modulation system, it is characterized in that: described pulse wave modulation circuit is by oscillating circuit, and the commutation circuit be connected with output end of oscillating circuit forms; Described oscillating circuit is by oscillator U, positive pole is connected with the BD pin of oscillator U after polar capacitor C2, negative pole after polar capacitor C3 with the not gate A1 that N pole is connected, output is connected with commutation circuit of diode D7, the polar capacitor C1 that positive pole is connected with resistance R4, negative pole is connected with two-stage low-pass filtering amplifying circuit forms; The GND pin ground connection of described oscillator U, VDD pin are connected with the negative pole of polar capacitor C1, FB pin is all connected with commutation circuit with CS pin, BD pin is connected with the collector electrode of triode VT1, and the positive pole of not gate A1 is also connected with the collector electrode of triode VT2;
Described commutation circuit is by trigger U1, the inverting amplifier D5 that P pole is connected with the CS pin of oscillator U, N pole is connected with the CK pin of trigger U1, the not gate A2 that negative pole is connected with the N pole of inverting amplifier D5, positive pole is connected with the Q pin of trigger U1, output is connected with the base stage of triode VT9 forms.The output of the CK pin NAND gate A1 of described trigger U1 is connected, D pin is connected with the FB pin of oscillator U.
5. the low-pass filtering based on voltage-dropping type constant current according to claim 4 amplifies peak clipping pulse wave modulation system, it is characterized in that: described two-stage low-pass filtering amplifying circuit is by amplifier P1, amplifier P2, triode VT3, triode VT4, positive pole is connected with the electrode input end of amplifier P1 after resistance R6, the polar capacitor C4 of minus earth, positive pole is connected with amplifier P1 negative input after resistance R7, the polar capacitor C5 that negative pole is connected with the negative pole of polar capacitor C4, be serially connected in the polar capacitor C6 between the output of amplifier P1 and negative input, negative pole is connected with the output of amplifier P1, the polar capacitor C7 that positive pole is connected with the base stage of triode VT4, one end is connected with the collector electrode of triode VT4, the resistance R8 that the other end is connected with the emitter of triode VT3, positive pole is connected with the base stage of triode VT3 after resistance R9, the polar capacitor C8 that negative pole is connected with the negative pole of polar capacitor C6 and the negative pole of electric capacity C1 simultaneously, one end is connected with the positive pole of polar capacitor C8, the resistance R11 that the other end is connected with the negative input of amplifier P2, the resistance R10 be in parallel with resistance R11, be serially connected in the polar capacitor C9 between the output of amplifier P2 and negative input, and the resistance R12 be serially connected between the electrode input end of amplifier P2 and output forms, as an output of system while the emitter of described triode VT4 is connected with polar capacitor C6 negative pole, the collector electrode of triode VT3 is connected with the electrode input end of amplifier P2, and the output of amplifier P2 is as another output of system, the electrode input end of described amplifier P1 is connected with the P pole of diode D8.
6. the low-pass filtering based on voltage-dropping type constant current according to any one of Claims 1 to 5 amplifies peak clipping pulse wave modulation system, it is characterized in that: described step-down chip U3 is A718EGT integrated chip.
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| CN201510323637.9A CN104967315A (en) | 2014-11-29 | 2015-06-12 | Low-pass filtering amplification peak-clipping pulse wave modulation system based on step-down type constant current |
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| CN201410715214.7A CN104467419A (en) | 2014-11-29 | 2014-11-29 | Two-stage low-pass filtering and amplifying, peak clipping and pulse modulation system based on linear driving |
| CN2014107152147 | 2014-11-29 | ||
| CN201510323637.9A CN104967315A (en) | 2014-11-29 | 2015-06-12 | Low-pass filtering amplification peak-clipping pulse wave modulation system based on step-down type constant current |
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| CN104849045A (en) * | 2015-05-17 | 2015-08-19 | 成都诚邦动力测试仪器有限公司 | Gearbox testing system based on peak clipping pulse wave modulation circuit |
| CN107888177B (en) * | 2017-11-22 | 2020-07-07 | 西安电子科技大学 | Integrated circuit internal bias correction circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080014887A1 (en) * | 2006-07-12 | 2008-01-17 | Seiko Epson Corporation | Reception Circuit, Radio-Controlled Timepiece, and Reception Circuit Control Method |
| CN202738178U (en) * | 2012-06-14 | 2013-02-13 | 青岛威力风光发电设备有限公司 | LED voltage reduction drive circuit |
| CN104467419A (en) * | 2014-11-29 | 2015-03-25 | 成都思茂科技有限公司 | Two-stage low-pass filtering and amplifying, peak clipping and pulse modulation system based on linear driving |
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- 2014-11-29 CN CN201410715214.7A patent/CN104467419A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080014887A1 (en) * | 2006-07-12 | 2008-01-17 | Seiko Epson Corporation | Reception Circuit, Radio-Controlled Timepiece, and Reception Circuit Control Method |
| CN202738178U (en) * | 2012-06-14 | 2013-02-13 | 青岛威力风光发电设备有限公司 | LED voltage reduction drive circuit |
| CN104467419A (en) * | 2014-11-29 | 2015-03-25 | 成都思茂科技有限公司 | Two-stage low-pass filtering and amplifying, peak clipping and pulse modulation system based on linear driving |
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