Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Patent
1986-07-07
1987-11-10
Wong, Peter S.
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
323284, 307358, 307362, 307363, G05F 1565
Patent
active
047060115
ABSTRACT:
A circuit for sensing a voltage present on an input line higher than a supply voltage V.sub.DD which includes an isolation switch coupled between the input line and an output line, a threshold adjustment diode coupled in series with the isolation switch also between the input and output lines for establishing a voltage above V.sub.DD at which the isolation switch turns on and a constant current source coupled from an output of the sensing circuit and ground.
REFERENCES:
patent: 3571694 (1971-03-01), Hunger et al.
patent: 4585955 (1986-04-01), Uchida
D'Arrigo Sebastiano
Imondi Giuliano
Vergara Sossio
Graham John G.
Groover III Robert
Texas Instruments Incorporated
Todd Voeltz Emanuel
Wong Peter S.
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