Temperature detecting device and method
US8303178B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 2010 |
| Grant date | Nov 6, 2012 |
| Priority date | — |
| Expiry date | Aug 2, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K2219/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A temperature detecting device includes a current source, a plurality of resistors, a binary counter, a multiplexer, a comparator and a control logic. The current source provides a PTAT current. The resistors provide m voltage signals with ascending or descending voltages. The binary counter generates a binary select signal having (n+1) bits. The m voltage signals are selectively outputted from the multiplexer as a multiplexer output signal according to the binary select signal, wherein 2n<m<2n+1. The comparator is used for comparing the multiplexer output signal with a reference voltage, thereby generating a comparing signal. The control logic is for issuing the start signal. If the comparing signal has a level change, the control logic controls the binary counter to record the binary select signal as a binary temperature signal. The reference voltage does not vary with temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.