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CN-224233671-U - High-quality square wave signal generating device

CN224233671UCN 224233671 UCN224233671 UCN 224233671UCN-224233671-U

Abstract

The utility model relates to the technical field of electronic circuits, in particular to a high-quality square wave signal generating device with reasonable structure, low cost and stable signal output, which is characterized by comprising a push-pull driving circuit, a transformer, a rectifying and filtering circuit and a comparison circuit, wherein the push-pull driving circuit is used for driving the transformer to work, the push-pull driving circuit is connected with a primary coil end of the transformer, the rectifying and filtering circuit is connected with a secondary coil end of the transformer, and the comparison circuit is connected with the rectifying and filtering circuit.

Inventors

  • FANG ZHENGYONG
  • LIN CHENGLONG
  • LIU LINA

Assignees

  • 山东新康威电子有限公司

Dates

Publication Date
20260512
Application Date
20250427

Claims (5)

  1. 1. A high-quality square wave signal generating device is characterized by comprising a push-pull driving circuit, a transformer, a rectifying and filtering circuit and a comparison circuit, wherein the push-pull driving circuit is used for driving the transformer to work, the push-pull driving circuit is connected with a primary coil end of the transformer, the rectifying and filtering circuit is connected with a secondary coil end of the transformer, and the comparison circuit is connected with the rectifying and filtering circuit.
  2. 2. The device for generating high-quality square wave signals according to claim 1, wherein the push-pull driving circuit comprises a triode Q1, a triode Q2, a diode D1 and a capacitor C1, wherein the triode Q1 is NPN, the triode Q2 is PNP, the triode Q1 and the triode Q2 form the push-pull circuit, a zener diode D1 is connected between an e pole and a C pole of the triode Q2, the capacitor C1 is connected with a cathode of the zener diode D1, the other end of the capacitor C1 is connected with a primary coil of a transformer, and the other end of the primary coil of the transformer is grounded.
  3. 3. The device for generating high-quality square wave signals according to claim 2, wherein the push-pull driving circuit further comprises a triode Q3, the triode Q3 adopts an NPN type, the b pole of the triode Q3 is connected with a resistor R1 in series, the other end of the resistor R1 is connected with a PWM signal input end, the e pole of the triode Q3 is grounded, the c pole of the triode Q3 is connected with a pull-up resistor R2, the other end of the pull-up resistor R2 is connected with a high potential of 24V, the resistor R1 is connected with the PWM signal input end by a resistor R3, the resistor R3 is connected with a resistor R4 in series, the other end of the resistor R4 is connected with +24V, one end of the resistor R5 is connected between the resistor R3 and the resistor R4, the other end of the resistor R4 is grounded, the emitter of the triode Q3 is grounded, the resistor R7 is connected with a resistor R8 in series after being connected in parallel, the other end of the resistor R8 is connected with the base of the triode Q2, the other ends of the resistor R7 and the resistor R6 are grounded, one end of the resistor R9 is connected with the base of the triode Q1, and the other end of the resistor is connected with the collector of the triode Q2.
  4. 4. The device for generating high-quality square wave signals according to claim 1, wherein the secondary coil of the transformer is connected with a rectifying and filtering circuit, the rectifying and filtering circuit comprises a diode D2, a capacitor C2 and a capacitor C3, wherein the anode of the diode D2 is connected with one end of the secondary coil, the other end of the secondary coil is grounded, and the cathode of the diode D2 is respectively connected with the capacitor C2 and the capacitor C3 in series and then grounded.
  5. 5. The device of claim 1, wherein the comparator circuit is provided with a comparator C1, the +Vcc end of the comparator C1 is connected with 24V, the +Vcc end is connected with a capacitor C6, the other end of the capacitor C6 is connected with ground, the output end of the comparator C1 is connected with the rectifying and filtering circuit, the non-inverting input end of the comparator C1 is connected with a resistor R10, the other end of the resistor R10 is connected with ground, the inverting input end of the comparator is respectively connected with a resistor R11 and a capacitor C4, the resistor R11 is connected with one end of a capacitor C5, the other end of the capacitor C5 is connected with ground, the other end of the capacitor C4 is connected with a resistor R12 in series, the other end of the resistor R12 is connected with the output end of the comparator C1, a resistor R13 and a resistor R14 are also provided, the resistor R13 is connected with the resistor R14 in series and then connected with the capacitor C5 in parallel, one end of the capacitor C7 is grounded, the other end of the capacitor C7 is connected with the resistor R18 and the resistor R19 in series and then connected with +3.3V, one end of the resistor R20 is connected with the junction of the resistor R11 and the resistor R14, the signal input end of the comparison circuit is connected with the PWM signal output end, the MOS tube Q4 is arranged, the G electrode of the MOS tube Q4 is connected with the resistor R21, the other end of the resistor R21 is connected with the PWM signal output end, the G electrode of the MOS tube Q4 is also connected with the pull-down resistor R22, the other end of the resistor R22 is grounded, the S electrode of the MOS tube Q4 is connected with +3.3V through the pull-up resistor R23, the D electrode of the MOS tube Q4 is also connected with one end of the resistor R24, and the other end of the resistor R24 is connected with the inverting input end of the comparator C1 in series.

Description

High-quality square wave signal generating device Technical field: the utility model relates to the technical field of electronic circuits, in particular to a high-quality square wave signal generating device which is reasonable in structure, low in cost and stable in signal output. The background technology is as follows: In the existing power supply field, different devices need to provide different power supplies. The laser printer is a device which needs a power supply to provide square wave alternating voltage for driving, the square wave generating circuit applied to the laser printer in the prior art has a complex structure, and the output square wave has poor quality. The invention comprises the following steps: Aiming at the defects and shortcomings in the prior art, the utility model provides the high-quality square wave signal generating device which is reasonable in structure, low in cost and stable in signal output. The utility model is achieved by the following measures: A high-quality square wave signal generating device is characterized by comprising a push-pull driving circuit, a transformer, a rectifying and filtering circuit and a comparison circuit, wherein the push-pull driving circuit is used for driving the transformer to work, the push-pull driving circuit is connected with a primary coil end of the transformer, the rectifying and filtering circuit is connected with a secondary coil end of the transformer, and the comparison circuit is connected with the rectifying and filtering circuit. The push-pull driving circuit comprises a triode Q1, a triode Q2, a diode D1 and a capacitor C1, wherein the triode Q1 is NPN, the triode Q2 is PNP, the triode Q1 and the triode Q2 form the push-pull circuit, the voltage stabilizing diode D1 is connected between the electrode e and the electrode C of the triode Q2, the capacitor C1 is connected with the negative electrode of the voltage stabilizing diode D1, the other end of the capacitor C is connected with the primary coil of the transformer, and the other end of the primary coil of the transformer is grounded. The push-pull driving circuit further comprises a triode Q3, wherein the triode Q3 is NPN type, the b pole of the triode Q3 is connected with a resistor R1 in series, the other end of the resistor R1 is connected with a PWM signal input end, the e pole of the triode Q3 is grounded, the c pole of the triode Q3 is connected with a pull-up resistor R2, the other end of the pull-up resistor R2 is connected with 24V high potential, a resistor R3 is connected between the resistor R1 and the PWM signal input end, the resistor R3 is connected with a resistor R4 in series, the other end of the resistor R4 is connected with +24V, one end of the resistor R5 is connected between the resistor R3 and the resistor R4, the other end of the resistor R5 is grounded, the emitter of the triode Q3 is connected with a base electrode of the triode Q2 in series after being connected with a resistor R8 in parallel, the other end of the resistor R8 is connected with the base electrode of the triode Q2, the other ends of the resistor R7 and the resistor R6 are both grounded, one end of the resistor R9 is connected with the base electrode of the triode Q1, and the other end of the resistor is connected with the collector electrode of the triode Q2. The secondary coil of the transformer is connected with a rectifying and filtering circuit, the rectifying and filtering circuit comprises a diode D2, a capacitor C2 and a capacitor C3, wherein the positive electrode of the diode D2 is connected with one end of the secondary coil, the other end of the secondary coil is grounded, and the negative electrode of the diode D2 is respectively connected with the capacitor C2 and the capacitor C3 in series and then grounded. The comparator circuit is provided with a comparator C1, wherein +Vcc of the comparator C1 is connected with 24V, vcc is connected with a capacitor C6, the other end of the capacitor C6 is connected with the ground, the output end of the comparator C1 is connected with the rectifying and filtering circuit, the non-inverting input end of the comparator C1 is connected with a resistor R10, the other end of the resistor R10 is connected with the ground, the inverting input end of the comparator is respectively connected with a resistor R11 and a capacitor C4, wherein the resistor R11 is connected with one end of the capacitor C5, the other end of the capacitor C5 is connected with the ground, the other end of the capacitor C4 is connected with a resistor R12 in series, the other end of the resistor R12 is connected with the output end of the comparator C1, a resistor R13 and a resistor R14 are also arranged, the resistor R13 is connected with the capacitor C5 in parallel after being connected with the resistor R14 in series, one end of the capacitor C7 is grounded, and the other end of the capacitor C7 is connected with a resistor R18 and a resistor R19 in series i