Power-on and power-off reset circuit system based on current detection and differencing

Abstract

The invention provides a power-on and power-off reset circuit system based on current detection and differencing. The power-on and power-off reset circuit system comprises a power supply module, a transconductance module, a current detection and differencing module and a logic module, the power supply module is connected with the transconductance module, the current detection and differencing module and the logic module; the transconductance module is connected with the current detection and differencing module, and the current detection and differencing module is connected with the logic module; and the logic module outputs an FLAG signal. According to the method for realizing the current detection and differencing principle, the precision, the power consumption and the area can be well compromised, and better power consumption and smaller area can be obtained within a reasonable precision range.

Description

technical field [0001] The present invention relates to the technical field of circuits, and in particular, to a power-on and power-off reset circuit system based on current detection and difference calculation. Background technique [0002] In SoC chips, digital circuits require a reset signal at a specific voltage to obtain a specific initial state for internal registers, and some analog circuits also require a reset signal at a specific voltage to achieve lower sleep power consumption. With the rapid development of CMOS technology, the complexity of integrated circuits is getting higher and higher. In commercial chips, digital-analog hybrid circuits have occupied most of the chip market, and POR and BOR circuits are also more and more widely used to ensure the entire The SoC works fine. In most POR and BOR circuits, the reset function of the circuit is usually realized by means of voltage detection and comparator triggering. This implementation method consumes too much p...

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Problems solved by technology

However, the above patent documents are based on the implementation of voltage detection. The voltage generation module and comparator need to consume relatively large power consumption, and the realization of low power consumption will waste a certain area.

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