Proximity detector with a stable current source
US5942812A · kind A · utility
2Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1997 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Nov 18, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/945
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A proximity detector having a power switch 30 which is switched as a function of the approach of an object. The detector includes a MOS depletion transistor T1 which connects one of the terminals 15 of the detector to a control input of a power switch 30 through a control switch T2. A regulator stage 45 is coupled to T1 in order to keep T1 saturated in the closed condition of the detector and to regulate the gate voltage of T1 when the detector is in a open state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.