Apparatus and methods for self-biasing differential signaling circuitry having multimode output configurations for low voltage applications
US7495477B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2007 |
| Grant date | Feb 24, 2009 |
| Priority date | — |
| Expiry date | Jul 31, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/04106
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present disclosure relates to a differential signaling circuit including differential signaling circuitry having at least one output and one input, that can operate in multiple mode of operations while using a single, low voltage supply source. Two or more switches are included and configured to selectively couple a supply voltage to the output dependent on a mode of operation of the differential signaling circuitry. The circuit also includes a switch control biasing circuit operatively coupled to at least one of the switches and to the output of the differential signaling circuitry. The switch control biasing circuit provides a switch control biasing voltage to control a state of the switch based on a voltage level of the output. Further, a bulk biasing circuit is included and operatively coupled to the switch. The bulk biasing circuit selectively provides a bulk biasing voltage to the switch based on the voltage level of the output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.