Low noise amplifier having bypass circuitry
US6522195B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2000 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Apr 23, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/7239
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A low noise amplifier (10) having an amplifier mode and a bypass mode. In the amplifier mode the input signal received at an input terminal (12) is amplified by an amplifying transistor (40) and the output signal supplied at an output terminal (50). In the bypass mode the input signal is not amplified, but transferred by a bypass circuit (22) from the base to the collector of the amplifying transistor. An input impedance matching circuit (14) and an output impedance matching circuit (44), along with the bypass circuit (22) provide a constant input and output impedance when the low noise amplifier (10) operates in the amplifier mode and the bypass mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.