Transducer for converting a varying reactance signal to a DC cur

Details Transducer for converting a varying reactance signal to a DC cur Transducer for converting a varying reactance signal to a DC cur

1975-01-20

1976-08-17

Habecker, Thomas B.

Communications: electrical

Systems

Call station

340186, 340210, G08C 1910

Patent

active

039757196

ABSTRACT:
A two wire current transmitter providing a current signal representing a parameter measured by a variable reactance transducer along the same two wires that are used to carry excitation power to the circuit. The reactance is measured by a circuit providing a DC signal which controls a current control stage to modify the total current through the two wires. The current control stage has a small number of components and operates on a relatively low voltage.

REFERENCES:
patent: 3051933 (1962-08-01), Cressey
patent: 3456132 (1969-07-01), Dechelotte
patent: 3517556 (1970-06-01), Barker
patent: 3560948 (1971-02-01), Inose
patent: 3562729 (1971-02-01), Hurd
patent: 3626274 (1971-12-01), Christofzik
patent: 3646538 (1972-02-01), Frick
patent: 3683344 (1972-08-01), Saito
patent: 3742342 (1973-06-01), Schick
patent: 3859594 (1975-01-01), Grindheim

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