Circuit for neutralizing thermal drift in a transconductance stage
US5365193A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 1992 |
| Grant date | Nov 15, 1994 |
| Priority date | — |
| Expiry date | Nov 25, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45696
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit device for neutralizing thermal drift in a transconductor differential stage using a first circuit portion which corresponds structurally to the transconductor differential stage and has a pair of MOS input transistors defining a transconductance value which is substantially proportional to that of the transconductor differential stage, a pair of bipolar output transistors coupled to the MOS input transistors in a cascode configuration, and a second circuit portion being supplied a current from an output of the first differential portion to thereby output a current to be passed to the transconductor differential stage. The value of the output current is inversely proportional to temperature-dependent parameters of the transconductance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.