Miscellaneous active electrical nonlinear devices – circuits – and – External effect – Temperature
Reexamination Certificate
2005-02-08
2005-02-08
Nguyen, Long (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
External effect
Temperature
C327S513000, C330S289000
Reexamination Certificate
active
06853237
ABSTRACT:
The invention provides a temperature-compensating circuit which comprises first degree and second degree temperature-coefficient-generating circuits respectively comprising an operational amplifier and a plurality of resistors each having different temperature coefficient, a sign-inverting circuit, and first degree and second degree temperature-coefficient-adjusting circuits. Resistance values of the resistors of the first degree and second degree temperature-coefficient-generating circuits are decided so that voltage amplification factors are linearly or quadratically changed as a temperature changes. The sign-inverting circuit inverts signs of temperature coefficients generated by the first degree and second degree temperature-coefficient-generating circuits and the first degree and second degree temperature-coefficient-adjusting circuits adjust temperature coefficients generated by the first degree and second degree temperature-coefficient-generating circuits to predetermined values. The temperature-compensating circuit generates any temperature coefficients necessary for temperature compensation to cancel an offset drift constant in the temperature characteristic of a sensor output and fluctuation components due to span-shift first degree and second degree temperature coefficients.
REFERENCES:
patent: 4873490 (1989-10-01), Hecht et al.
patent: 5134885 (1992-08-01), Hecht et al.
patent: 5796291 (1998-08-01), Mattes et al.
patent: 6181192 (2001-01-01), Tohyama et al.
patent: 62-118620 (1987-05-01), None
patent: 63-269812 (1988-11-01), None
Hara Masaya
Murakami Mitsumasa
Mitsubishi Denki & Kabushiki Kaisha
Mitsubishi Electric Engineering Company
Nguyen Long
LandOfFree
Temperature-coefficient-generating circuit and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Temperature-coefficient-generating circuit and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temperature-coefficient-generating circuit and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3452046