Programmable logarithmic gain adjustment for open-loop amplifiers
US6570447B2 · kind B2 · utility
9Cited by
14References
37Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 25, 2001 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | May 25, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G7/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Transconductance-based variable gain amplifiers amplify an input voltage by converting the voltage difference to a current and then amplifying the result. At least one resistor network is adjusted depending on the magnitude of the input voltage difference and the output desired. A network of MOS transistor switches with a small footprint adjusts the resistance of the input voltage circuit in a way to insure consistent resistance and low stray capacitance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.