Bridge drive circuit and method

Details Bridge drive circuit and method Bridge drive circuit and method

1978-01-19

1979-10-16

Pellinen, A. D.

Electricity: power supply or regulation systems

Remote sensing

323 75N, 73362AR, G01L 118

Patent

active

041715098

ABSTRACT:
A bridge circuit for a measurement bridge of the type using four impedance arms provides an output referenced to ground which is a function of the impedances in the respective arms. The bridge circuit includes an impedance bridge comprising first, second, third and fourth impedance arms connected in series loop with first, second, third and fourth bridge terminals serially defined at the connections between the respective arms. A source of constant current is connected between the first terminal and ground. A driver is connected to bridge terminals other than the output terminal. The driver is responsive to bridge terminal signals to provide a bridge output which is a function of the impedances in the respective arms.

REFERENCES:
patent: 3341757 (1967-09-01), Cate
patent: 3495159 (1970-02-01), Smith
patent: 3754442 (1973-08-01), Arnett
patent: 3893192 (1975-07-01), Jensen
patent: 3943434 (1976-03-01), Haeusler et al.
Guyton, "Feedback Linearizes Resistance Bridge", Electronics, Oct. 23, 1972, p. 102.

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