Modified cascode circuit
US5049835A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 27, 1990 |
| Grant date | Sep 17, 1991 |
| Priority date | — |
| Expiry date | Feb 27, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/226
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Conventional cascode circuits achieve a performance which is not optimum. To enhance performance, the cascode circuit of the present invention has an input stage FET that has a saturation current which is greater than the saturation current of the output stage common gate FET. Since the maximum power of a cascode circuit is related to the maximum voltage swing at the drain of the common gate FET, when the saturation current of the common source FET is greater than that of the common gate FET, the common source FET essentially acts as a switch to turn the common gate FET fully on, without dissipating any appreciable voltage from the same, so that a maximum voltage swing may be produced at the drain of the common gate FET.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.