CMOS output amplifier independent of temperature, supply voltage and manufacturing quality of transistors
US6724217B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2002 |
| Grant date | Apr 20, 2004 |
| Priority date | — |
| Expiry date | May 17, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0997
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention relates to a circuit of which the operating rate varies according to temperature, supply voltage and intrinsic quality of the transistors of the circuit, associated to a compensating circuit which comprises a constant current source (26) that produces a substantially constant current which is independent of temperature, supply voltage and intrinsic quality of the transistors of the circuit, a variable current source (28) producing a current that increases in an inverse proportion to temperature, supply voltage and intrinsic quality of the transistors of the circuit, and means for decreasing the operating rate of the circuit when the difference of the currents produced by the first and second sources increases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.