Variable gain amplifier including impedance ladder circuit with exponentially dependent degeneration resistance
US11855598B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2022 |
| Grant date | Dec 26, 2023 |
| Priority date | — |
| Expiry date | Aug 25, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G2201/502
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A variable gain amplifier includes input terminals configured to receive a differential input of the variable gain amplifier, output terminals configured to generate a differential output of the variable gain amplifier, the differential output having a gain applied by the variable gain amplifier to the differential input, and an impedance ladder circuit coupled to the input terminals, the impedance ladder circuit comprising a plurality of semiconductor switches configured to receive respective control signals based on a control voltage. The plurality of semiconductors switches are responsive to the respective control signals to adjust the gain of the variable gain amplifier and configured with a predetermined exponential scale such that the impedance ladder circuit causes a slope of the gain of the variable gain amplifier relative to the control voltage to be generally linear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.