Low-noise amplifier
US7495515B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2007 |
| Grant date | Feb 24, 2009 |
| Priority date | — |
| Expiry date | Sep 17, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45544
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Methods and corresponding systems in a low noise amplifier include selecting a selected sub-band for amplifying, wherein the selected sub-band is one of a plurality of sub-bands, wherein each sub-band is a portion of a frequency band, and wherein each sub-band has a corresponding sub-band center frequency. Next, a gate-source capacitor is adjusted so that a real part of an LNA input impedance corresponds to a real part of a source impedance at the selected sub-band center frequency. A match capacitor is also adjusted so that the LNA input impedance corresponds to the complex conjugate of the source impedance at the selected sub-band center frequency. The gate-source capacitor and the match capacitor can each be adjusted by recalling capacitor values from memory that correspond to the selected sub-band, and connecting selected capacitor components in response to the recalled capacitor values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.