Electrical interface circuit

Details Electrical interface circuit Electrical interface circuit

1990-04-30

1992-10-20

Gaffin, Jeffrey A.

Electrical transmission or interconnection systems

Miscellaneous systems

323909, 330 85, H02J 500

Patent

active

051572745

ABSTRACT:
An electrical interface circuit (200), for use with a zirconium dioxide sensor (202), includes an input differential amplifier (208) having its inverting input coupled to the circuit input (204) to receive a sensor voltage relative to sensor ground potential, and having its output coupled to the circuit output (210) to produce an output voltage relative to circuit ground potential. Additionally a feedback differential amplifier (214) has its inverting input coupled to the circuit output (210), its non-inverting input coupled to sensor ground potential, and its output coupled to the non-inverting input of the input differential amplifier (208) so that voltage change at the circuit input due to change of sensor ground potential relative to circuit ground potential is substantially cancelled.

REFERENCES:
patent: 4222012 (1980-09-01), Yokoyama
patent: 4280102 (1981-07-01), Yokoyama
patent: 4291276 (1981-09-01), Ida
patent: 4571553 (1986-02-01), Yokoyama

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