This paper presents an all-CMOS temperature sensor front-end operating at low supply voltage. The front-end includes a reference voltage generator and a proportional-to-absolute-temperature (PTAT) voltage generator. In order to minimize the errors due to various mismatches, error correction techniques including gain boosting, dynamic element matching, dynamic offset cancellation and clock boosting have been investigated. Detailed analysis and simulation have been presented. Furthermore, experimental results with 0.5 μm implementation demonstrated that the lowest supply voltage is 1.1 V for the reference voltage generator and 1 V for the PTAT voltage generator over the temperature range of 55°C to 125°C with acceptable performance for a CMOS-based temperature sensor front-end. The effectiveness of the error correction techniques are also demonstrated experimentally.
|Number of pages||4|
|State||Published - 2012|
|Event||2012 IEEE International Symposium on Circuits and Systems, ISCAS 2012 - Seoul, Korea, Republic of|
Duration: May 20 2012 → May 23 2012
|Conference||2012 IEEE International Symposium on Circuits and Systems, ISCAS 2012|
|Country/Territory||Korea, Republic of|
|Period||05/20/12 → 05/23/12|