Low voltage differential amplifier circuit and a sampled low power bias control technique enabling accommodation of an increased range of input levels
US7102439B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2004 |
| Grant date | Sep 5, 2006 |
| Priority date | — |
| Expiry date | Sep 16, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45684
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A differential amplifier design and bias control technique of particular applicability for low voltage operation in which the threshold voltage of n-channel differential input transistors is controlled using substrate bias in order to allow a wider range of input signal levels. Further disclosed is a technique for controlling the substrate bias of the input transistors of a differential amplifier based on the level of the output of the amplifier in addition to a differential amplifier circuit capable of low voltage operation in which an additional bias current is introduced that enables the output pull-up current to be increased without increasing the pull-down current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.