Proximity detector with a stable current source

Details Proximity detector with a stable current source Proximity detector with a stable current source

1997-11-18

1999-08-24

Gaffin, Jeffrey

Electrical transmission or interconnection systems

Switching systems

Condition responsive

307 18, 307 43, 307 52, 307 62, H01H 3500

Patent

active

059428120

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.

REFERENCES:
patent: 4001718 (1977-01-01), Wilson et al.
patent: 4138709 (1979-02-01), Colwill
patent: 4328433 (1982-05-01), Nodera et al.
patent: 4344071 (1982-08-01), Allen
patent: 4924122 (1990-05-01), Harris
patent: 5463333 (1995-10-01), Calder et al.
patent: 5552644 (1996-09-01), Calder et al.

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