发明授权
US09218015B2 Method and circuit for low power voltage reference and bias current generator
有权
低功率参考电压和偏置电流发生器的方法和电路
- 专利标题： Method and circuit for low power voltage reference and bias current generator
- 专利标题（中）： 低功率参考电压和偏置电流发生器的方法和电路
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申请号： US13648639申请日： 2012-10-10
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公开(公告)号： US09218015B2公开(公告)日： 2015-12-22
- 发明人: Stefan Marinca
- 申请人： Analog Devices, Inc.
- 申请人地址： US MA Norwood
- 专利权人： ANALOG DEVICES, INC.
- 当前专利权人： ANALOG DEVICES, INC.
- 当前专利权人地址： US MA Norwood
- 代理机构： Kenyon & Kenyon LLP
- 主分类号： G05F3/30
- IPC分类号： G05F3/30
摘要：
Circuits for generating a PTAT voltage as a base-emitter voltage difference between a pair of bipolar transistors. The circuits may form unit cells in a cascading voltage reference circuit that increases the PTAT voltage with each subsequent stage. The bipolar transistors are controlled using a biasing arrangement that includes an MOS transistor connected to a current mirror that provides the base current for the bipolar transistors. A voltage reference is formed by combining a PTAT voltage and a CTAT voltage at the last stage. The voltage reference may be obtained from the voltage at an emitter of one of the bipolar transistors in the last stage.
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