Title：A extreme low-power wide temperature range sub-threshold reference voltage source
Country：China
Patent No.：201110091565.1
Legal Status：Authorized
Inventor：Dongmei Li, Pengpeng Yuan, Liyuan Liu, Xin Wang
Assignee：Tsinghua University
Address：Tsinghua University,Haidian District Beijing 100084, China
Filing Date：2011-04-13
Issue Date：2013-08-21
Abstract：
The invention relates to a bandgap reference source with extremely low power consumption and a wide temperature range, belonging to the field of design of an analog integrated circuit. The reference source comprises a starting circuit, a reference voltage generating circuit, a reference voltage output circuit and a voltage buffer, wherein the starting circuit is connected with the reference voltage generating circuit; the reference voltage generating circuit is connected with the reference voltage output circuit; the reference voltage output circuit is connected to the buffer; the starting circuit is used for ensuring that a circuit can be separated from a non-ideal working point in the starting process and enters a normal working point and ensuring that the circuit can be prevented from being deviated from the normal working point when a power supply voltage is interfered; the reference voltage generating circuit is used for providing bias current for the circuit and generating a reference voltage which is independent of the ground; and the reference voltage output circuit is used for outputting a reference voltage relevant to an electric potential. According to the bandgap reference source, a low reference voltage temperature coefficient can be realized under the condition of extremely low power consumption and wide temperature range, and the process sensitivity is very low.
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