Pulse power supply circuit applicable to multiple modulation modes

Abstract

The invention discloses a pulse power supply circuit applicable to multiple modulation modes. The pulse power supply circuit comprises a metal-oxide-semi conductor field-effect transistor Q1 for controlling the on-off of circuit transmission, a dynamic driving circuit used for receiving pulse signals and switching on the metal-oxide-semi conductor field-effect transistor Q1, and a gate charge discharging circuit for quickly discharging the gate charges of the metal-oxide-semi conductor field-effect transistor Q1; the gate of the metal-oxide-semi conductor field-effect transistor Q1 is connected with one end of the dynamic driving circuit and one end of the gate charge discharging circuit; the drain of the metal-oxide-semi conductor field-effect transistor Q1 is connected with the other end of the gate charge discharging circuit, a direct-current voltage input end and a capacitor Cin; the capacitor Cin is grounded; and the source of the metal-oxide-semi conductor field-effect transistor Q1 is connected with a pulse voltage output end and an output circuit used for decreasing high-frequency signal impedance and improving response speed. The pulse power supply circuit applicable to multiple modulation modes has the advantages of high response speed and low power consumption, and can satisfy pulse power supply requirements under high input voltage and high modulation frequency.

Description

technical field [0001] The invention relates to a power supply circuit, in particular to a pulse power supply circuit suitable for multiple modulation modes. Background technique [0002] At present, to achieve the purpose of outputting the modulated pulse voltage, there are the following two circuit methods: [0003] 1. Use the drive control chip to drive the N-channel power switch tube to modulate the input voltage; however, when driving the power switch tube, it is necessary to add the driving voltage to the source and drain stages of the power switch tube for driving. At this time, the power switch tube The source is at the output pulse voltage terminal, but the general driver chip can only generate a drive signal to the ground, it is difficult for the chip to directly drive the power switch tube, and there is a problem of high cost of using the drive control chip. [0004] 2. Use the P-channel power switch tube as the power switch tube, and use the voltage regulator tu...

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Problems solved by technology

[0003] 1. Use the drive control chip to drive the N-channel power switch tube to modulate the input voltage; however, when driving the power switch tube, it is necessary to add the driving voltage to the source and drain stages of the power switch tube for driving. At this time, the power switch tube The source is at the output pulse voltage terminal, but the general driver chip can only generate a drive signal to the ground, it is difficult for the chip to directly drive the power switch tube, and there is a problem of high cost of using the drive control chip

[0004] 2. Use the P-channel power switch tube as the power switch tube, and use the voltage regulator tube D1, the voltage dividing resistors R1, R2 and the N-channel small-signal power switch tube to switch and control the P-channel power switch tube; However, it has a limited range of use and can only be applied to applications with low input voltage and modulation frequency.

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