Wide dynamic range switching variable gain amplifier and control
US7259620B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 27, 2005 |
| Grant date | Aug 21, 2007 |
| Priority date | — |
| Expiry date | Dec 7, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/7227
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A plurality of variable gain amplifier stages are coupled by an attenuation circuit that receives a voltage input to be amplified. A control circuit activates each of the variable gain amplifier stages in a seamless manner in accordance with a control signal applied to a voltage control node, while maintaining no more than one of the stages active at any time. Fractions of the reference signal voltage level are set to define boundaries between control voltage level ranges of the amplifier stages. A unique control voltage level range is thus established for each amplifier stage. A control voltage hysteresis range can be provided to avoid oscillations between stages at the transition voltages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.