Multi-port cross-connected multi-level cascode differential amplifier
US7161429B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2003 |
| Grant date | Jan 9, 2007 |
| Priority date | — |
| Expiry date | Jan 3, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45318
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A differential cascode amplifier has first and second cascode circuits, driven by two differential signal sources including input resistances.The first cascode circuit includes a first input transistor having a first collector, a first emitter, and a first base, and a first output transistor having a second collector, a second base, and a second emitter coupled to the first collector. The second cascode circuit includes a second input transistor having a third collector, a third emitter, and a third base, and a second output transistor having a fourth collector, a fourth base, and a fourth emitter coupled to the third collector. The amplifier has a first connection connecting the first base to the fourth base, and a second connection connecting the second base to the third base.This cross-connected differential cascode architecture provides doubled output bandwidth and current gain (in dB), further increasing input impedance and output swing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.