Sensitivity of the four-arm bridge

THE rapid increase in the use of a-c bridges for the measurement of electrical and nonelectrical quantities makes desirable a critical analysis of the performance characteristics of various types of bridge structures. The literature is replete with descriptions of multitudinous bridges and there is a great mass of analytical treatment and experimental data available concerning bridges designed for special purposes. The selection of a particular type of bridge is dictated by many conditions, the more important of which are: (a). Sensitivity requirements (b). Accuracy requirements (c). Magnitude and characteristics of quantity to be measured (d). Voltage and current requirements (e). Frequency (f). Availability of bridge components