Circuit for achieving power supply sequential control

Abstract

The invention provides a circuit for achieving power supply sequential control, and belongs to the field of power supply sequential control. The circuit for achieving power supply sequential control is composed of a time delay circuit, a comparison circuit and a negative electricity control circuit. The simple circuits are additionally arranged by ingeniously utilizing multiple integrated chips, the negative electricity time delay power supply sequential control function is achieved, the logic protection function is achieved due to the fact that a hysteresis comparator is additionally arranged, and meanwhile antijamming capacity is enhanced, so that double guarantees of the circuit for achieving power supply sequential control on the time sequence and logic are achieved.

Description

technical field [0001] The invention relates to a circuit for realizing power sequence control, which belongs to the field of power supply sequence control. Background technique [0002] Over the years, it has become extremely important to monitor and control more and more supply voltages in order to make electronic systems safe, economical, durable and functional. Especially in microwave and millimeter-wave circuits, due to the particularity of the chip manufacturing process, the positive and negative power have their own unique power-on and power-off sequences. If there is a problem with the sequence, it will bring a catastrophic disaster. Circuitry becomes indispensable. [0003] The traditional power sequence control circuit is realized by two methods: one is realized by an integrated chip; the other is realized by using discrete components. [0004] The principle of circuit design realized by using integrated chips is to use the power sequence control chip to control ...

AI Technical Summary

Problems solved by technology

[0004] The principle of circuit design realized by integrated chips is to use the power sequence control chip to control multiple power supply voltages at the same time. The disadvantage is that the power sequence control chip can only process and control the same polarity of power at the same time, and cannot realize positive and negative control.

[0005] The principle of circuit design using discrete components is to control the power supply voltage by using the characteristics of the great difference between the on-off resistance of the triode. The disadvantage is that only one power supply voltage can be controlled, and there is a problem of voltage rise time, which makes the timing control impossible. , the voltage control accuracy is not enough

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