Correctable low-power consumption voltage reference source with power-on reset function

Abstract

The invention discloses a correctable low-power consumption voltage reference source with a power-on reset function. The correctable low-power consumption voltage reference source comprises a power-on reset circuit, a starting circuit, a reference voltage source core circuit, a reference voltage correcting circuit and a buffer circuit. The correctable low-power consumption voltage reference source disclosed by the invention has the power-on reset function, and can detect whether the supply voltage is effective supply voltage or not; the starting circuit has the characteristic of high starting speed; the reference voltage correcting circuit adopts a digital technology to correct MOS tubes and has the characteristics of high convenience in correction, small area and low power consumption; the correctable low-power consumption voltage reference source has the advantages of high precision, low power consumption, small area and wide working voltage range.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to a correctable low power consumption voltage reference source with power-on reset. Background technique [0002] The reference voltage source is the most widely used analog circuit in circuits such as memory, analog-to-digital / digital-to-analog converter, and power management. The reference voltage source is used to provide a stable voltage, and its voltage value does not change with the power supply voltage, temperature, and process. [0003] With the continuous reduction of integrated circuit process size and the rapid development of portable devices, electronic products have higher and higher requirements for power consumption, so low-power reference voltage sources are becoming more and more important. In the integrated circuit manufacturing process, due to the influence of factors such as process angle and mismatch, the finally obtained reference voltage will deviate ...

AI Technical Summary

Problems solved by technology

The traditional reference voltage correction circuit trims the resistors, so more resistors are needed, but more resistors correspond to a large area, and a large area means high cost

The traditional voltage reference source does not have a power-on reset circuit, so it is impossible to judge whether the current power supply voltage value is a valid working voltage value

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