Temperature code circuit with single ramp for calibration and determination
US9715913B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2015 |
| Grant date | Jul 25, 2017 |
| Priority date | — |
| Expiry date | Jul 30, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K4/50
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Techniques and circuitry are presented for more rapidly and accurately obtaining a temperature code (TCO) on an integrated circuit. A comparison voltage is ramped up and two counts are determined concurrently, a first count on how many clock cycles for the comparison voltage to ramp up from a low reference voltage to a proportional to absolute temperature (PTAT) and a second count for the number of clock cycles for the comparison voltage to go from the low reference voltage to a high reference voltage. The TCO value is then obtained by using the second count in a post-processing calibration to adjust the first count. An initial calibration can also be included when the circuit is powered up.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.