High-precision configurable power-on reset circuit and configuration method thereof

Abstract

The invention discloses a high-precision configurable power-on reset circuit which mainly solves the problems that an existing power-on reset circuit is not high in reset precision and may fail underlow voltage in an oscillation circuit and other analog circuits, and consequently the circuit time sequence is disordered. According to the circuit, the resistors R1 and R4 are arranged to adjust thethreshold voltage of the VDD, so that the threshold voltage is configurable. By arranging the resistor R2, the temperature coefficient can be adjusted, the stability of the VDD threshold voltage in the full-temperature range is ensured, and the precision of the circuit is improved. And meanwhile, bias currents of Q1 and Q3 are controlled by using a resistor R3, so that the power consumption is reduced. Therefore, compared with the prior art, the invention has outstanding substantive features and significant progress, and has very high use value and promotional value.

Description

technical field [0001] The invention relates to the technical field of semiconductor circuits, in particular to a high-precision, configurable power-on reset circuit and a configuration method thereof. Background technique [0002] A reset circuit is a circuit device used to restore the circuit to its initial state. Its operating principle is similar to that of a calculator, but the starting principle and means are different. The reset circuit is to use it to restore the circuit to the initial state. Just like the function of the reset button of the calculator, so as to return to the original state and recalculate. [0003] Such as figure 1 Shown is a power-on reset circuit in the prior art, which can be used as a power-on reset circuit with low power consumption. When the resistance value of the resistor is large enough, the working current can be as low as 10nA. This circuit is more suitable as a reset circuit for digital circuits, because the reset of digital circuits ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-precision, configurable power-on reset circuit and its configuration method, which mainly solves the problem that the reset precision of the existing power-on reset circuit is not high, and it may fail under low voltage in analog circuits such as oscillating circuits. Problems that cause circuit timing disorder

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