Touch sensitive electronic switching circuit for electronic wristwatches
US4160923A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1977 |
| Grant date | Jul 10, 1979 |
| Priority date | — |
| Expiry date | Dec 22, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/9645
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a touch sensitive electronic switching circuit including a C-MOS inverter, for use in electronic wristwatches, a resistor of 1-10 M.OMEGA. is connected to the source electrode of the P-channel MOS type field effect transistor included within the C-MOS inverter, whereby the threshold voltage level of the C-MOS inverter is shifted to a low level to enhance the reliability of the touch sensitive electronic switching circuit. In another embodiment, the resistor of 1-10 M.OMEGA. is connected to the source electrode of the N-channel MOS type field effect transistor included within the C-MOS inverter, whereby the threshold voltage level of the C-MOS inverter is shifted to a high level to enhance the reliability of the touch sensitive electronic switching circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.