Rejection circuitry for variable-gain amplifiers and continuous-time filters
US7091783B2 · kind B2 · utility
5Cited by
9References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2004 |
| Grant date | Aug 15, 2006 |
| Priority date | — |
| Expiry date | Mar 10, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45659
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Variable-gain amplifiers (VGAs) and/or continuous-time filters (CTFS) are implemented with circuitry that provides improved power-supply rejection. The power-supply rejection circuitry may include a current source and a diode-connected MOSFET that inhibit noise in the reference-voltage power supply from reaching the output nodes of the VGA or CTF. Although the present invention enables separate implementations of VGAs and CTFs, in one embodiment, a VGA function and a CTF function are implemented in a single set of (e.g., integrated) circuitry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.