Output stage interface circuit for outputting digital data onto a data bus, and a method for operating an output stage interface circuit
US7570089B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2006 |
| Grant date | Aug 4, 2009 |
| Priority date | — |
| Expiry date | Jun 5, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/017518
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An output stage interface circuit for interfacing with a data bus, comprising first and second rails for receiving respectively a high voltage and a low voltage from a power supply; a data output terminal; a first main switch element coupled between said terminal and the first rail and comprising a first main MOS device having a gate and an independently configurable back gate, and responsive to a first data control signal applied to the gate pulling the voltage on the data output terminal toward the first rail voltage; and a first control circuit responsive to the voltage on said terminal being pulled from a first state across a first voltage reference to a second state for coupling said back gate to said terminal and permitting coupling of the gate of said MOS device to said terminal, the first main MOS device presenting a high impedance on the terminal when its voltage is pulled to the second state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.