Ultra-low-power-consumption voltage reference source circuit with adjustable output voltage

Abstract

The invention discloses an ultra-low-power-consumption voltage reference source circuit with an adjustable output voltage. The ultra-low-power-consumption voltage reference source circuit with the adjustable output voltage comprises a bias current module, a threshold voltage difference generation module and an output voltage adjustment module which are connected in sequence, wherein the bias current module is realized through an NMOS tube, a threshold voltage of the NMOS tube is lower than a set value, and the NMOS tube works in a sub-threshold area; the threshold voltage difference generationmodule adopts a threshold voltage difference of the NMOS tube to generate a reference voltage; and the output voltage adjustment module reduces the output reference voltage through an aspect ratio adjustment circuit. The ultra-low-power-consumption voltage reference source circuit with the adjustable output voltage has the advantages of ultra-low power consumption, small area and adjustable output reference voltage.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to an ultra-low power consumption voltage reference source circuit with adjustable output voltage. Background technique [0002] The voltage reference circuit is an essential part of all electronic systems. In the Internet of Things and most wireless communication fields, since they are all battery-powered or self-powered, the system has very high requirements for power consumption. Ultra-low power consumption has been developed. Modules are imminent. Traditional reference source circuits use bipolar transistors to provide reference voltages, which have the disadvantages of large area and high power consumption. [0003] In recent years, in order to reduce power consumption, field effect transistors operating in the subthreshold region are often used to replace bipolar transistors. However, the threshold voltage of the field effect tube has a great influence with the p...

AI Technical Summary

Problems solved by technology

However, the threshold voltage of the field effect tube has a great influence with the process, and directly applying it to the circuit will cause the reference voltage to be inaccurate, so it is necessary to adjust the output reference voltage according to actual needs.

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