Touch sensitive electronic switching circuitry for electronic wristwatches
US4099074A · kind A · utility
6Cited by
6References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1976 |
| Grant date | Jul 4, 1978 |
| Priority date | — |
| Expiry date | Mar 5, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04G21/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a touch sensitive electronic switching circuit including a C-MOS inverter, for use in an electronic wristwatch, a resistor of about 5 M.OMEGA. is connected between the gate electrode of the C-MOS inverter and an input terminal associated with a touch sensitive electrode formed on a preferred position of the casing of the electronic wristwatch. The resistor of about 5 M.OMEGA. functions to prevent the C-MOS inverter from being damaged by an erroneous application of a high voltage to the touch sensitive electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.