Circuit technique for eliminating impact ionization in a differential pair used in an output stage
US4740760A · kind A · utility
1Cited by
1References
2Claims
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Assignee
Inventor
Key dates
| Filing date | Nov 14, 1986 |
| Grant date | Apr 26, 1988 |
| Priority date | — |
| Expiry date | Nov 14, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/523
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An additional device is provided in parallel with one of the input devices of a differential pair. A fixed bias voltage, which is slightly less than the midpoint of the swing range of the input voltage to the differential pair, is applied to the gate of the added device. During the positive swing of the input, the added device remains off and does not effect performance. When the input voltage becomes lower than the fixed bias voltage, the added device turns on and conducts all current needed by the current source, leaving the differential input devices off, and eliminating impact ionization in the differential pair.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.