Invention Grant
- Patent Title: Low temperature error thermal sensor
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Application No.: US16571914Application Date: 2019-09-16
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Publication No.: US11493389B2Publication Date: 2022-11-08
- Inventor: Jaw-Juinn Horng , Szu-Lin Liu
- Applicant: Taiwan Semiconductor Manufacturing Company, Ltd.
- Applicant Address: TW Hsinchu
- Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
- Current Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
- Current Assignee Address: TW Hsinchu
- Agency: Merchant & Gould P.C.
- Main IPC: G01K15/00
- IPC: G01K15/00 ; G01K7/18

Abstract:
A thermal sensor in some embodiments comprises two temperature-sensitive branches, each including a thermal-sensing device, such as one or more bipolar-junction transistors, and a current source for generating a current density in the thermal-sensing device to generate a temperature-dependent signal. The thermal sensor further includes a signal processor configured to multiply the temperature-dependent signal from the branches by respective and different gain factors, and combine the resultant signals to generate an output signal that is substantially proportional to the absolute temperature the thermal sensor is disposed at.
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