The design of a computerhyphen;automated capacitancehyphen;conductance bridge is described. The bridge operates in the frequency range 40 Hzndash;40 kHz with a resolution better than 0.1percnt; at signal levels as low as 400 mgr;V and is most useful for studying the complex impedance of nonlinear devices as a function of the test signal amplitude, frequency, and waveform. Of particular interest is the stability problem associated with feedback during the selfhyphen;balancing process for the two impedance phases.
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