Low power consumption and low temperature offset CMOS reference voltage source

Abstract

The invention discloses a low power consumption and low temperature offset CMOS reference voltage source. The CMOS reference voltage source comprises a starting circuit, a bias voltage generating circuit, a main bias current generating circuit and a reference voltage generating circuit, wherein the direct current input terminals of the starting circuit, the bias voltage generating circuit, the main bias current generating circuit and the reference voltage generating circuit are all connected with a direct current power VDD; both the starting circuit and the bias voltage generating circuit are connected with the main bias current generating circuit; the main bias current generating circuit is connected with the reference voltage generating circuit; the reference voltage generating circuit outputs low power consumption and low temperature offset reference voltage Vref. The CMOS reference voltage source is easy to realize on CMOS technology, has good compatibility, and can realize low power consumption and low temperature reference voltage under low voltage.

Description

technical field [0001] The invention relates to the technical fields of digital-analog hybrid integrated circuits and radio frequency integrated circuits, in particular to a CMOS reference voltage source with low power consumption and low temperature drift. Background technique [0002] Reference voltage sources are widely used in analog, mixed-signal integrated circuits and system-on-chips to provide appropriate bias voltages or reference voltages, and their performance directly affects the performance of the system. Such as operational amplifier (Op-Amp), analog-to-digital converter (ADC), digital-to-analog converter (DAC), low-dropout linear regulator (LDO), voltage-controlled oscillator (VCO) and phase-locked loop (PLL). Clock data recovery (CDR) and other circuits need to output accurate and stable reference voltages that do not vary with temperature and power supply voltage. In integrated circuits, there are three commonly used reference voltage sources: buried Zener ...

AI Technical Summary

Problems solved by technology

However, its cascode structure and automatic voltage adjustment technology limit the low-voltage and low-power applications of this bandgap reference voltage source.

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