Invention Grant
- Patent Title: Resistance and offset cancellation in a remote-junction temperature sensor
- Patent Title (中): 远程结温传感器中的电阻和偏移消除
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Application No.: US13931799Application Date: 2013-06-28
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Publication No.: US09395253B2Publication Date: 2016-07-19
- Inventor: Mikel K. Ash , Xiao Pu , Joonsung Park , Krishnaswamy Nagaraj
- Applicant: Texas Instruments Incorporated
- Applicant Address: US TX Dallas
- Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee Address: US TX Dallas
- Agent John R. Pessetto; Frank D. Cimino
- Main IPC: G01K15/00
- IPC: G01K15/00 ; G01K7/00 ; H03M3/00 ; G01K7/01

Abstract:
A temperature sensor uses a semiconductor device that has a known voltage drop characteristic that is proportional to absolute temperature (PTAT). A controllable current source is coupled to the semiconductor device and is operable to sequentially inject a bias current having a value I(bias) and fixed ratio N of I(bias) into the semiconductor device. A delta sigma analog to digital converter (ADC) has an input coupled to the semiconductor device. The delta sigma ADC is configured to sample and integrate a sequence of voltages pairs produced across the semiconductor device by repeatedly injecting an ordered sequence of selected bias currents into the semiconductor device. The ordered sequence of selected bias currents comprises M repetitions of (N×I(bias); I(bias)) and one repetition of (M×I(bias); M×N×I(bias)).
Public/Granted literature
- US20150003490A1 Resistance and Offset Cancellation in a Remote-Junction Temperature Sensor Public/Granted day:2015-01-01
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