CMOS (Complementary Metal-Oxide Semiconductor) band-gap reference voltage generation circuit

A technology of reference voltage and circuit generation, applied in the fields of microelectronics and solid-state electronics, to achieve the effect of improving stability and eliminating the effect of second-order temperature modulation
CN101840243AInactive Publication Date: 2010-09-22SHANGHAI HUAHONG GRACE SEMICON MFG CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI HUAHONG GRACE SEMICON MFG CORP
Publication Date
2010-09-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a CMOS (Complementary Metal-Oxide Semiconductor) band-gap reference voltage generation circuit for output of the reference voltage, comprising a first CMOS, a second CMOS, a third CMOS, a first triode, a second triode, an amplifier and a fourth CMOS. The base electrode of the fourth CMOS is connected with the output end of the amplifier, the source electrode of the fourth CMOS is connected with the source electrodes of the first CMOS, the second CMOS and the third CMOS, the base electrode and the connecting electrode of the third triode are grounded. The emitting electrode of the third triode is connected with the drain electrode of the fourth CMOS. The CMOS band-gap reference voltage generation circuit, by adding a branch and a plurality of resistors, eliminates the second-order temperature modulation effect of the triode in the original circuit effectively and improves the stability of the band-gap reference voltage generation circuit.
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Description

technical field

[0001] The invention belongs to the technical field of microelectronics and solid electronics, and relates to a voltage reference source circuit of an integrated circuit, in particular to a CMOS bandgap reference voltage generating circuit. Background technique

[0002] The reference voltage source is a key module widely used in analog circuit design. It can provide high-precision and high-stability reference power supply. The reference voltage source has little correlation with power supply, process parameters and temperature, but the generated reference voltage accuracy, temperature stability and anti-noise ability directly affect the accuracy and performance of the entire circuit system. Therefore, it is of great significance to design a high-performance reference voltage source.

[0003] Since Robert Widla proposed the bandgap reference voltage source in 1971, compared with other types of reference voltage sources, the bandgap reference voltage source ha...

Claims

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