Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1987-08-05
1989-09-12
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307262, 307240, 307491, H03K 522, H03K 1756
Patent
active
048662976
ABSTRACT:
A processing circuit for use with DC-voltage-output type sensors comprising: a preamplifier; an automatic polarity-switching means coupled to the sensor and the preamplifier for switching the connection condition between a non-polarity-inversion condition and a polarity-inversion condition; and a controlling-measuring means for controlling the automatic polarity-switching means in carrying out the switching alternately between the non-polarity-inversion condition and the polarity-inversion condition, and for measuring the difference between the output of the preamplifier under the non-polarity-inversion condition and the output of the preamplifier under the polarity-inversion condition, thereby cancelling the effects of the input offset voltage of the preamplifier and the offset voltage of the preamplifier and the offset voltage generated by the input bias current and the resistance of said DC-voltage-output type sensor.
REFERENCES:
patent: 3624414 (1971-11-01), Van Dijk
patent: 3947699 (1976-03-01), Whitmer
patent: 4068138 (1978-01-01), Miyakawa et al.
patent: 4354235 (1982-10-01), Blakeslee
Horiba Ltd.
Miller Stanley D.
Roseen Richard
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