Low-power-consumption small-area temperature compensation type low-voltage detection circuit

Abstract

The invention provides a low-power-consumption small-area temperature compensation type low-voltage detection circuit comprising a resistance voltage division and hysteresis module, a comparator module and an output module. A first end of the comparator module is electrically connected with a first end of the resistance voltage division and hysteresis module; and a first end of the output module is electrically connected with a second end of the comparator module. According to the invention, no band-gap reference circuit and reference current generation circuit are arranged, so that the area and power consumption are greatly saved; with a voltage detection point, adjustment can be carried out via OPTION and the precision is high; because of the hysteresis function, the temperature coefficient of the voltage detection point becomes small by adjusting the temperature coefficient of the divider resistor and the temperature coefficient of the comparator.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a low-voltage detection circuit with low power consumption and small area temperature compensation. Background technique [0002] During the normal working process of the single-chip microcomputer, the power supply voltage of the single-chip microcomputer may drop under the aging of the battery or abnormal conditions of the external power supply. When the power supply voltage drops to a certain voltage, the internal circuit will not work normally or the performance failure, such as the storage part When a data error occurs, the performance of the analog module decreases. Usually, the power supply voltage needs to be detected in real time inside the single-chip microcomputer. When the power supply voltage is detected to drop to the set value, a reset signal is generated to protect the output part from danger. Most of the time, the single-chip microcomputer works at low ...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a low-voltage detection circuit with low power consumption and small area temperature compensation, and its purpose is to solve the problems of large power consumption and large area of ​​the traditional low-voltage detection circuit

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