Electricity: measuring and testing – Magnetic – Magnetometers
Patent
1994-03-11
1995-10-03
O'Shea, Sandra L.
Electricity: measuring and testing
Magnetic
Magnetometers
327513, G01R 3102
Patent
active
054555108
ABSTRACT:
A signal comparison circuit is provided which exhibits a change in its hysteresis as a function of changing temperature. The change in the hysteresis is accomplished by arranging first and second transistors in association with each other and in association with a feedback resistor of a comparator. The known variation in base-emitter voltage drop of transistors as a function of changing temperature is taken advantage of by the comparison circuit and the voltage at the feedback resistor of a comparator is changed as a function of temperature change. As a result, the hysteresis is decreased as a result of increasing temperature and increased as a result of decreasing temperature so that changes in signal magnitude of first and second input signals does not adversely affect the ability of the circuit to respond to changes in the difference between the first and second input signals and properly provide an output signal at the correct time. This characteristic is particularly advantageous in applications, such as automotive applications, which must operate consistently regardless of wide temperature fluctuations.
REFERENCES:
patent: 4506217 (1985-03-01), Rothley et al.
patent: 4521727 (1985-06-01), Atherton et al.
patent: 4908527 (1990-03-01), Van Antwerp
patent: 4914387 (1990-04-01), Santos
patent: 4966041 (1990-10-01), Miyazaki
patent: 5055768 (1991-10-01), Plagens
patent: 5231351 (1993-07-01), Kordts et al.
Honeywell Inc.
Lanyi William D.
O'Shea Sandra L.
Phillips Roger
LandOfFree
Signal comparison circuit with temperature compensation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Signal comparison circuit with temperature compensation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal comparison circuit with temperature compensation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1079542