Amplifier device with gain switching, for a cellular mobile telephone in particular
US6756848B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2002 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | Mar 26, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G1/0088
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifier device with gain switching includes an amplifier, and a configurable load circuit including an inductive element. The configurable load circuit is capable of exhibiting two configurations having two different impedance values. A controllable switch is connected between the amplifier and the load circuit to select one of the two configurations of the load circuit. The load circuit includes two insulated-gate field effect load transistors connected in series, and which operate in a triode mode. The inductive element is connected in parallel with the pair of load transistors, and between a power supply terminal and the switching circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.