Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1987-03-10
1989-02-14
Hudspeth, David
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
307570, 307580, 307581, H03K 1778
Patent
active
048048666
ABSTRACT:
A solid state relay includes a MOS FET receiving a photovoltaic output generated across a photovoltaic diode array responsive to a light signal from a light-emitting element, and a normally ON driving transistor connected to the MOS FET, the driving transistor being connected at control electrode to a connection point between the photovoltaic diode array and an impedance element to be biased by a voltage generated across the impedance element during generation of the photovoltaic output across the photovoltaic diode array to have a high impedance state, whereby the relay can be prevented from providing at output terminals any intermediate state between ON and OFF states even when an input current to the relay is in lower range, and a high speed relay operation is realized.
REFERENCES:
patent: 4227098 (1980-10-01), Brown et al.
patent: 4307298 (1981-12-01), El Hamamsy et al.
patent: 4390790 (1983-06-01), Rodriguez
patent: 4419586 (1983-12-01), Phipps
patent: 4492883 (1985-01-01), Janutka
patent: 4500801 (1985-02-01), Janutka
patent: 4665316 (1987-05-01), Hodges
Hudspeth David
Matsushita Electric & Works Ltd.
LandOfFree
Solid state relay does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Solid state relay, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solid state relay will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1367884