发明申请
- 专利标题: Low Voltage Temperature Sensor and use Thereof for Autonomous Multiprobe Measurement Device
- 专利标题(中): 低电压温度传感器及其自动多点测量装置的使用
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申请号: US12731455申请日: 2010-03-25
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公开(公告)号: US20110234300A1公开(公告)日: 2011-09-29
- 发明人: Junmou Zhang , Lew G. Chua-Eoan
- 申请人: Junmou Zhang , Lew G. Chua-Eoan
- 申请人地址: US CA San Diego
- 专利权人: QUALCOMM INCORPORATED
- 当前专利权人: QUALCOMM INCORPORATED
- 当前专利权人地址: US CA San Diego
- 主分类号: G01K7/01
- IPC分类号: G01K7/01
摘要:
A bandgap sensor which measures temperatures within an integrated circuit is presented. The sensor may include a first transistor having an emitter node coupled in series to a first resistor and a first current source, wherein a PTAT current flows through the first resistor, and a second transistor having a base node coupled to a base node of the first transistor, and a collector node coupled to a collector node of the first transistor, further wherein the first and second transistors are diode connected. The sensor may further include a first operational amplifier providing negative feedback to the first current source, wherein the negative feedback is related to a difference in the base-emitter voltages of the first and second transistors, and a second operational amplifier which couples the base-emitter voltage of the second transistor across a second resistor, wherein a CTAT current flows through the second resistor.