Low power systems using enhanced bias control in rail-to-rail gain stage amplifiers
US6566958B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 14, 2000 |
| Grant date | May 20, 2003 |
| Priority date | — |
| Expiry date | Nov 14, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/308
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for biasing the gain stage of an amplifier which may result in high signal gain, stable quiescent bias, and which controls the current in the quiescent state. A bias reference signal is coupled to the base of a gain stage transistor, and a bias feedback signal is coupled to adjust the bias reference signal based on the bias current of the gain stage transistor. The bias reference signal can be coupled to an input signal that is input to the base of the gain stage transistor. A compensation element can be coupled to the base of the gain stage transistor to control the time response of the gain stage transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.