Monitoring circuit for a supply voltage

Details Monitoring circuit for a supply voltage Monitoring circuit for a supply voltage

1997-04-24

1998-09-08

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327143, 327198, H03K 5153, H03K 302

Patent

active

058049959

ABSTRACT:
The subject of the invention is a monitoring circuit for at least one supply voltage, having comparators that generate a first report signal if the supply voltage is below a predeterminable threshold value and a second report signal after a fixed warning time elapses. The supply voltage is supplied in a first circuit unit (4) to a first comparator (7). The first comparator is followed by a switch element, with which a capacitor (19), connected parallel to it and chargeable from an operating voltage source, can be short-circuited in order to lower the input voltage of a second comparator (13), disposed in the control unit (4), to below a second reference voltage that defines a limit value for the resetting of the report signal. The noninverting output of the second comparator (13) is followed by the base of an output transistor (14), whose emitter is connected to the negative pole of the operating voltage, the positive pole whereof is connected via a resistor (31) to the collector of the output transistor (14). The first report signal appears at the output transistor (14). The collector of the output transistor (14) is followed via a diode (20) by a capacitor (23), which in a second circuit unit (24) identical to the first circuit unit (4) is connected to the first comparator (7').

REFERENCES:
patent: 4317080 (1982-02-01), Acker
patent: 5367265 (1994-11-01), Gaudette
patent: 5446404 (1995-08-01), Badyal et al.
patent: 5514981 (1996-05-01), Tam et al.

Affiliated with

Also associated with

Rating

Monitoring circuit for a supply voltage does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Monitoring circuit for a supply voltage, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Monitoring circuit for a supply voltage will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1285162