Circuit for detecting power supply voltage variation

Details Circuit for detecting power supply voltage variation Circuit for detecting power supply voltage variation

1990-09-24

1991-09-03

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

3072963, 3072965, 307306, 307350, 330257, H03K 301, H03K 338, H03K 5153

Patent

active

050457187

ABSTRACT:
A circuit for detecting a variation in power supply voltage includes first transistor (PM1) arranged as a current source and connected to the input (K1) of a current mirror (NM1, NM2), whose output (K2) is connected to a second transistor (PM2) arranged as a current source and to the output of the circuit. In the event of a temporary decrease in supply voltage this circuit will produce a pulse-shaped signal on its output, which signal can be employed as a trigger signal such as a reset signal in bistable circuits.

REFERENCES:
patent: 4649292 (1987-03-01), Rusznyak
patent: 4697097 (1987-09-01), Rusznyak
patent: 4767942 (1988-08-01), Minami et al.

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