Low temperature coefficient complementary metal oxide semiconductor (CMOS) band-gap reference circuit of output belt low drop-out linear voltage regulator

A technology of low-dropout linear and voltage regulators, which is applied in the direction of instruments, electric variable adjustment, control/regulation systems, etc., can solve the problem of relatively high index requirements of voltage reference circuits, and achieve the effect of low output bandgap reference voltage

Inactive Publication Date: 2011-05-25
EAST CHINA NORMAL UNIV
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Problems solved by technology

Almost all the technical indicators that characterize these two circuits have great versatility, the difference is that

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  • Low temperature coefficient complementary metal oxide semiconductor (CMOS) band-gap reference circuit of output belt low drop-out linear voltage regulator
  • Low temperature coefficient complementary metal oxide semiconductor (CMOS) band-gap reference circuit of output belt low drop-out linear voltage regulator
  • Low temperature coefficient complementary metal oxide semiconductor (CMOS) band-gap reference circuit of output belt low drop-out linear voltage regulator

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Embodiment Construction

[0023]Hereinafter, the present invention will be further described through specific examples, but the examples are only examples of optional implementations of the present invention, and the disclosed features are only used to illustrate and illustrate the technical solutions of the present invention, and are not intended to limit protection scope of the present invention.

[0024] refer to figure 1 , now describe in detail the main working process of the present invention:

[0025] The invention includes four parts: a starting circuit module A, a bandgap reference module B, a clamp operational amplifier D and an output drive module C based on a low-dropout linear regulator. The circuit startup (module A) is realized in this way: when the entire circuit is powered on, the M1 tube is turned on, the gate voltage of the M3 tube rises, so that the M3 tube is in a saturated state, and the drain voltage of M3 drops, making M4 and M6 saturated . The current is mirrored to the midd...

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Abstract

The invention discloses a low temperature coefficient complementary metal oxide semiconductor (CMOS) band-gap reference circuit of an output belt low drop-out linear voltage regulator. The band-gap reference circuit comprises a start-up circuit module, a band-gap reference module, a clamping operational amplifier and an output driving module based on low drop-out (LDO), wherein an output end of the start-up circuit module is connected with an input end of the band-gap reference module; an output end of the band-gap reference module is connected with an input end of the output driving module; and an output end of the output driving module is used for outputting needed band-gap reference voltage. The low drop-out linear voltage regulator is taken as an output buffer stage by the band-gap reference circuit, so that the requirement of high driving capability is met, and lower voltage output can be obtained.

Description

technical field [0001] The present invention relates to a kind of circuit, especially a kind of low temperature coefficient CMOS bandgap reference circuit of output band low dropout linear voltage stabilizer, in integrated circuit system, bandgap reference circuit is an essential, it has low temperature Coefficient, high power supply rejection ratio, long-term stability, etc., usually used for mixer (Mixer), voltage-controlled oscillator (VCO), channel selection filter (CSF), analog-to-digital converter (ADC), programmable Blocks such as gain amplifiers (PGAs) provide accurate voltage and current reference sources. Background technique [0002] The reference voltage source is an extremely important part of contemporary analog integrated circuits, and it plays an important role in the application and development of high-tech analog electronic technology. In many integrated circuits, such as digital-to-analog converters. Analog-to-digital converters and linear regulators all...

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Application Information

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IPC IPC(8): G05F1/56
Inventor 朱彤徐倩龙黄龙谢淼黄飞袁圣越许帅任旭马聪蒋颖丹赖宗声张润曦
Owner EAST CHINA NORMAL UNIV
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