Common mode regulation for thermal tail compensation
US7514997B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 11, 2006 |
| Grant date | Apr 7, 2009 |
| Priority date | — |
| Expiry date | Dec 29, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45722
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A waveform processing system, and associated methods and apparatus, may include a common mode feedback compensation circuit to adjust a voltage supplied to a differential circuit so as to substantially reduce or eliminate signal distortion associated with thermal tails. In an illustrative example, a feedback circuit may control a supply voltage to maintain a common mode voltage at the collectors of the input transistors of a differential amplifier. For example, the feedback may compensate for component tolerances and/or temperature changes that may cause the cause the input transistors to operate away from a nominal constant power operating point. In some embodiments, the differential circuit and common mode feedback compensation circuit may be configured to substantially reduce thermal tail effects by controlling the supply voltage to maintain a substantially constant power condition for the input transistors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.