Providing a constant impedance at an input of a signal amplifier for different gain modes
US11476819B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 8, 2020 |
| Grant date | Oct 18, 2022 |
| Priority date | — |
| Expiry date | Oct 27, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/16
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Disclosed herein are methods for use in operating signal amplifiers that provide impedance adjustments for different gain modes. The impedance adjustments are configured to result in a constant real impedance for an input signal at the amplifier. Some of the disclosed methods adjust impedance using switchable inductors to compensate for changes in impedance with changing gain modes. Some of the disclosed methods adjust a device size to compensate for changes in impedance with changing gain modes. By providing impedance adjustments, the amplifiers reduce losses and improve performance by improving impedance matching over a range of gain modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.