Apparatus and methods for self-biasing differential signaling circuitry having multimode output configurations for low voltage applications
US7893719B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2007 |
| Grant date | Feb 22, 2011 |
| Priority date | — |
| Expiry date | Dec 6, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0018
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital data transmitting device is disclosed having differential signaling circuitry, a current source controller and a pair of transistor-implemented current sources is disclosed. The current source controller generates a current source control signal based on a detected mode of operation of the differential signaling circuitry. The pair of transistor-implemented current sources selectively generate source currents to adjust the output voltage levels as the differential output terminals in response to the current source control signal. The digital data transmitting device may also include a current bulk biasing circuit that generates a current source bulk biasing signal such that when the differential signaling circuitry is in one mode of operation, the current source bulk biasing signal retards currents leakage across the pair of transistor-implemented current sources.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.