The use of active devices in precision bridges
Henry P. Hall, R. G. Fulks · Electrical Engineering · 1962
Active devices make possible the design of impedance-measuring instruments with important new features by performing such operations as isolation, phase inversion, and integration. The disadvantages accompanying such devices are, in the main, overcome by the use of multistage transistor-feedback amplifiers. Several measuring circuits, including a new incremental inductance bridge, are discussed