Multimode input circuit receiving two signals having amplitude variations different from each other
US5283565A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1992 |
| Grant date | Feb 1, 1994 |
| Priority date | — |
| Expiry date | Sep 2, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/3685
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A multimode input circuit comprises a input terminal, first outputting circuit including a buffer circuit, for receiving a first signal having a first amplitude variation via the input terminal and outputting the first signal of a preset potential; second outputting circuit for receiving a second signal having a second amplitude variation different from the first amplitude variation via the input terminal and outputting a third signal of a preset potential, the second outputting circuit including a power source supplying terminal for supplying the same potential as the maximum potential of the second signal, a first FET having a source connected to said power source supplying terminal, a gate supplied with a selection signal for specifying one of the input signals to be selected by the multimode input circuit and a drain, and a second FET formed to make a complementary structure together with the first FET and having a drain connected to the drain of the first FET, a gate connected to the input terminal and a source connected to a circuit ground, and selecting circuit for receiving the first and third signals from the first and second outputting circuit and a selection signal from …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.