Timing control circuit of pulse power supply

Abstract

The invention relates to a timing control circuit of a pulse power supply. The timing control circuit comprises a DC/DC (Direct Current) converter 1, a DC/DC converter 2, a power-on detection circuit, a delay circuit, a power-down detection circuit, switching current and a drive circuit. The power-on timing problems of GaAs devices and the like are solved by fewer components. The power-down timing circuit solves the damage problems of the GaAs devices and the like caused by timing abnormity due to output power-down. The power-down timing circuit is combined with the delay circuit, so that the output overcurrent or short-circuit protection problems of positive voltage are simultaneously solved. The timing control circuit provided by the invention can be widely applied to electronic circuits which need to meet positive and negative power supply timing in the fields of communications, radar, aviation, electronic countermeasure and the like.

Description

technical field [0001] The invention relates to a timing control circuit, in particular to a timing control circuit of a pulse power supply, which is directly applicable to electronic circuits that need to meet positive and negative power supply timing in the fields of communication, radar, aviation, and electronic countermeasures. Background technique [0002] With the development of radio frequency technology, pulsed output voltage is usually used to power radio frequency circuits. Radio frequency devices put forward higher requirements on the switching timing of switching power supplies: a large number of GaAs FETs are used in radio frequency circuits, and signal transmission is completed by modulating the drain voltage of GaAs FETs. Gallium arsenide field effect transistor is a depletion device, and when its gate voltage is 0V, the device is also in a fully conducting state. Therefore, when powering GaAs devices, it is required that the negative gate voltage always prec...

AI Technical Summary

Problems solved by technology

However, 1) due to the use of a comparator, it is necessary to supply power to the comparator, especially when the two output voltages are low, an additional power supply circuit is required, which increases the complexity of the circuit; 2) the circuit cannot meet the requirements of shutdown Timing requirements, using this circuit to design to meet the GaAs FET power supply, can not meet the timing requirements when the input power is turned off

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