Temperature detection circuit
US7969227B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2010 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | Oct 18, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/327
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
According to one embodiment, a temperature detection circuit is provided which requires only a small number of additional components, thus minimizing an increase in costs and which offers an insulating property and high responsiveness. A temperature detection circuit outputs a first PWM signal corresponding to a temperature of a first temperature sensor from a photointerrupter as a signal insulated from the first temperature sensor. A temperature detection circuit outputs a second PWM signal corresponding to a temperature of a second temperature sensor from a photointerrupter as a signal insulated from the second temperature sensor. A controlling arithmetic apparatus calculates a higher one of the temperatures detected by the first and second temperature sensors based on the PWM signals output from the photointerrupter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.