Multiplexing input circuit
US4551634A · kind A · utility
44Cited by
5References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1983 |
| Grant date | Nov 5, 1985 |
| Priority date | — |
| Expiry date | Mar 30, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/693
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An input circuit having a plurality of channels, each channel includes a conductor line, first and second transistors inserted in series into the conductor line and a third transistor. When a channel is not selected, the first and second transistors are turned off and the third transistor is turned on to clamp the conductor line at a predetermined constant voltage. When a channel is selected, the third transistor is turned off and first and second transistors are turned on to transfer the corresponding information input therethrough.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.