Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1977-07-29
1979-02-20
Anagnos, Larry N.
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
307200B, 307251, 307279, 328 48, H03K 1720, H03K 1722, H03K 1730, H03K 1760
Patent
active
041409302
ABSTRACT:
A voltage level detection circuit comprises a first MOS transistor having the gate and the drain connected together with a power source voltage V.sub.DD via a resistor and the source grounded and a second MOS transistor having the gate connected with the drain of the first MOS transistor and the source grounded via a resistor. The circuit functions to compare the power source voltage V.sub.DD with a sum of the threshold voltage levels of the first and second MOS transistors, whereby voltage detection outputs are developed at the source of the second MOS transistor.
REFERENCES:
patent: 3628070 (1971-12-01), Heuner et al.
patent: 3875430 (1975-04-01), Prak
patent: 3898790 (1975-08-01), Takamune et al.
patent: 3949545 (1976-04-01), Chihara
patent: 4013902 (1977-03-01), Payne
patent: 4024415 (1977-05-01), Matsuura
patent: 4025865 (1977-05-01), Munday et al.
patent: 4037399 (1977-07-01), Chihara
patent: 4043110 (1977-08-01), Chihara
patent: 4043112 (1977-08-01), Tanaka
patent: 4045688 (1977-08-01), Stewart
Anagnos Larry N.
Sharp Kabushiki Kaisha
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