Temperature sensing circuit, driving apparatus, and printer
US6028472A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 21, 1998 |
| Grant date | Feb 22, 2000 |
| Priority date | — |
| Expiry date | May 21, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/3011
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A temperature-sensing circuit has a pair of bipolar transistors of different sizes, exposed to the temperature to be sensed. A current mirror circuit, or an operational amplifier and another bipolar transistor, is used to sense the difference between the base-emitter voltages of the bipolar transistors and generate a corresponding output current, which is converted to a voltage output signal. This temperature-sensing circuit can be integrated into a driving circuit to sense the temperature of the driven elements and compensate for temperature effects. In a printer, the temperature-sensing circuit can be used for temperature compensation of dot-forming elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.