Variable gain amplifier controller
US6804073B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2001 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | Jun 2, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/00813
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatus responsive to a signal derived by a magnetic transducer includes a variable gain amplifier arrangement having an input responsive to the signal and an output terminal. An analog gain control circuit responds to the signal at the output terminal. An analog to digital converter responds to the signal at the output terminal. Circuitry responsive to an output signal of the analog gain control circuit and an output signal of the analog to digital converter causes the gain of the variable gain amplifier to be simultaneously controlled in response to gain control output signals resulting from the output signals of the analog gain control circuit and the analog to digital converter. Both gain control output signals are derived in response to the same instantaneous value of the output signal at the output terminal of the variable gain amplifier arrangement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.