Ultra-low power reset circuit

Abstract

The invention relates to an ultra-low power consumption reset circuit, comprising a micro-current bias circuit, a positive feedback loop, an inverter, a first PMOS transistor, a second PMOS transistor, a first NMOS transistor and a second NMOS transistor; the micro-current bias circuit The bias circuit is used to generate the bias voltage; the bias signal output terminals of the micro-current bias circuit are respectively connected to the gate of the first PMOS transistor, the gate of the first NMOS transistor and the gate of the second NMOS transistor, and the first PMOS The source of the tube and the second PMOS tube is connected to the power supply, the drain of the first PMOS tube and the drain of the first NMOS tube are connected to the gate of the second PMOS tube, and the drain of the second PMOS tube and the second NMOS tube The drain of the first NMOS transistor is connected to the signal input terminal of the inverter, and the source of the first NMOS transistor and the source of the second NMOS transistor are grounded. The ultra-low power consumption reset circuit has simple structure, low cost and low static power consumption.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to an ultra-low power consumption reset circuit. Background technique [0002] In integrated circuits with digital circuits, a reset circuit structure is basically required. Its function is to configure the state of the digital circuit to the required initial state during power-on to prevent intermediate or indeterminate states. [0003] There are two main types of commonly used reset circuits. The first type of reset circuit resets with hysteresis generated by capacitor charging; the second type of reset circuit is in a continuous conduction state and resets through bias settings. [0004] The first type of reset circuit: the structure is simple, but the reset point is uncontrollable, the capacitor needs a large area, and the cost is high; [0005] The second type of reset circuit: due to continuous conduction, there is a large static power consumption, and at the sam...

AI Technical Summary

Problems solved by technology

[0004] The first type of reset circuit: the structure is simple, but the reset point is uncontrollable, the capacitor needs a large area, and the cost is high;

[0005] The second type of reset circuit: due to continuous conduction, there is a large static power consumption, and at the same time, the structure is complex and the cost is high

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