Low-power-consumption high-PSRR band-gap reference source

A low power consumption, reference source technology, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problem of low output voltage accuracy
CN105320198AActive Publication Date: 2016-02-10BEIJING SMARTCHIP MICROELECTRONICS TECH COMPANY +1
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
BEIJING SMARTCHIP MICROELECTRONICS TECH COMPANY
Publication Date
2016-02-10

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Abstract

The invention discloses a low-power-consumption high-PSRR band-gap reference source. The low-power-consumption high-PSRR band-gap reference source comprises a first P-channel field-effect transistor, a second P-channel field-effect transistor, a third P-channel field-effect transistor, a fourth P-channel field-effect transistor, a fifth P-channel field-effect transistor, a sixth P-channel field-effect transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a first double-polar-form transistor, a second double-polar-form transistor and a voltage feedback circuit. By adopting the double-layer current mirror structure and adding a biasing resistor, the influence of the channel length modulation effect between current mirrors is reduced, the accuracy of a current multiplication factor is guaranteed, and then detuning of output voltage is reduced.
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Description

technical field

[0001] The invention relates to the technical field of bandgap reference sources, in particular to a bandgap reference source with low power consumption and high PSRR. Background technique

[0002] In integrated circuit design, it is mainly divided into two parts: analog circuit and digital circuit. The on-chip bandgap voltage reference source is the core module of the analog circuit, and its performance determines the performance and function realization of the entire analog circuit and even the entire chip. Currently the most widely used bandgap voltage references with the best performance indicators are implemented with bipolar devices. Its principle is to superimpose the voltage with positive temperature coefficient and the voltage with negative temperature coefficient with a certain coefficient to obtain a bandgap voltage with approximately zero temperature coefficient.

[0003] With the advancement of technology and the improvement of people's require...

Claims

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