Controlled impedance transistor switch circuit
US5834860A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 1995 |
| Grant date | Nov 10, 1998 |
| Priority date | — |
| Expiry date | May 1, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/164
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An output driver circuit comprises a plurality of parallel pull up and pull down circuits each comprising at least one transistor switch switchable between on and off states and circuitry operable to maintain a desired resistance in the circuit when the transistor switch is switched on, and switch actuating circuitry including time delay circuitry for effecting a sequence of transistor switching operations in said pull-up and pull-down circuits with a time delay between successive operations, each operation effecting simultaneous switching of a transistor in one pull-up circuit and one pull-down circuit, whereby the output impedance is stabilised during a change in signal on the output terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.