Transconductor stage for high frequency filters
US5332937A · kind A · utility
10Cited by
10References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1992 |
| Grant date | Jul 26, 1994 |
| Priority date | — |
| Expiry date | Sep 9, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H11/0433
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A transconductor differential stage for high-frequency filters, which has a MOS differential input pair with common sources. The drain of each MOS input is connected to the emitter of an npn bipolar. These two matched bipolars have their gates connected together with the gate of a third bipolar, which is diode-connected. Two matched current sources feed the two bipolars, and a third current source feeds the third bipolar. A single controlled current sink is connected to the sources of both MOS input transistors, and also (through a resistor) to the third bipolar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.