Low-voltage and low-power-consumption reference voltage source and low reference voltage generating circuit

Abstract

The invention provides a low-voltage and low-power-consumption reference voltage source comprises a starting circuit, a low reference voltage generating circuit and a stabilizing circuit and is characterized in that the starting circuit detects a voltage signal at the first output end of the low reference voltage generating circuit so as to judge whether the low reference voltage generating circuit works normally; when the low reference voltage generating circuit is not started, an output current source is generated by the starting circuit forcibly to charge the low reference voltage generating circuit, after the charging is completed, the low reference voltage generating circuit is started and works normally, the voltage signal at the first output end of the low reference voltage generating circuit changes in a jump mode, and the starting circuit automatically switches off the output current source according to the detected voltage signal; the voltage signal is generated at the first output end of the low reference voltage generating circuit to be output to the starting circuit; when the low reference voltage generating circuit works normally, a reference voltage is generated at the second output end of the low reference voltage generating circuit to be output, and meanwhile, the third output end of the low reference voltage generating circuit outputs a reference voltage sampling signal to obtain the stabilizing circuit.

Description

technical field [0001] The invention relates to a reference voltage source and a circuit that need to generate low voltage and low power consumption in analog and digital-analog hybrid circuits, in particular to a low voltage and low power consumption reference voltage source and a low reference voltage generation circuit based on CMOS technology. Background technique [0002] High-precision and stable reference voltage sources are widely used in analog and mixed-signal applications. In some communication devices, such as RFID and handheld mobile terminals, there is a demand for reference voltage sources with small area, low voltage, low power consumption, and low temperature sensitivity. [0003] The traditional reference voltage source circuit is usually implemented by using the bandgap characteristics of diodes or BJT transistors. Since the conduction voltage of diodes and BJT transistors is about 0.6V at normal temperature, it can even be as high as 0.8V at negative temp...

AI Technical Summary

Problems solved by technology

[0004] A reference voltage source with low voltage, low power consumption, and low temperature sensitivity can be realized by using MOS transistors working in the sub-threshold region, but it will be difficult to implement

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