Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Clock or pulse waveform generating
Patent
1996-02-15
1998-04-07
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Clock or pulse waveform generating
327190, 327168, 327300, H02M 3335, H03K 501
Patent
active
057368848
ABSTRACT:
A device for generating a control signal voltage which is dependent on a resistance value of a variable resistor (8) includes a transformer (24) having a first winding (22) which is in series with the variable resistor and a rectifier diode (20). A current generator (32) coupled to a power source is coupled to a second winding (26) of the transformer and supplies it with a periodically interrupted current (I.sub.2). Upon each such interruption an exponentially decreasing current will flow through the first winding and also through the variable resistor (8). The peak value of the voltage drop produced by such current across that resistor is proportional to the resistance value thereof. It is also produced across the first winding (22) and is detected by the peak detector (62). That constitutes the control voltage (U.sub.c). Since the variable resistor is fully electrically isolated from the power source, it can be safely touched without shock hazard.
REFERENCES:
patent: 4052623 (1977-10-01), Loberg
patent: 4297595 (1981-10-01), Huellwegen
patent: 4584635 (1986-04-01), MacInnis et al.
patent: 4709161 (1987-11-01), Mizohata et al.
patent: 4791546 (1988-12-01), Carroll
patent: 5003451 (1991-03-01), Gradl et al.
patent: 5181170 (1993-01-01), Huang et al.
patent: 5517089 (1996-05-01), Ravid
De Wit Johannes
Ettes Wilhelmus G. M.
Viet Peter S.
Bartlett Ernestine C.
Callahan Timothy P.
Englund Terry L.
U.S. Philips Corporation
LandOfFree
Device for generating a control signal dependent on a variable r does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for generating a control signal dependent on a variable r, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for generating a control signal dependent on a variable r will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-16360