Patent
Low-power-source-dependency band-gap reference voltage circuit design based on PTAT current
Hai Liu,Pan Hongshuai,Niu Xiaocong,Kan Xiangnan,Jing Shengyu,Liu Tingzheng,Gao Qianbo,Han Feng +7 more
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TLDR
In this paper, a low-power-source-dependency band-gap reference voltage circuit design based on the PTAT current was proposed, in which a starting circuit, a reference voltage generating circuit and a reference buffering output circuit are used to drive a lowresistance load and meanwhile providing various voltage references.Abstract:
The invention discloses the low-power-source-dependency band-gap reference voltage circuit design based on the PTAT current. The low-power-source-dependency band-gap reference voltage circuit design comprises a starting circuit, a reference voltage generating circuit and a reference buffering output circuit, wherein the reference voltage generating circuit is composed of three parts including a cascode current mirror circuit, a positive temperature coefficient PTAT current generating circuit and a negative temperature coefficient current generating circuit. The starting circuit is used for starting the reference voltage generating circuit after being powered on. The reference buffering circuit is used for reducing the output resistance to drive a low-resistance load and meanwhile providing various voltage references. According to the low-power-source-dependency band-gap reference voltage circuit design based on the PTAT current, the cascode PTAT current generating circuit is used for being coordinated with an external circuit to generate the reference voltage with the stable performance and the zero temperature coefficient, and meanwhile the method of separating an external power source from the bias voltage required by the circuit is used for greatly reducing the power source dependency caused by the channel length modulation effect of an MOS device.read more
Citations
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References
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Patent
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