A simple transformer bridge for the measurement of transistor characteristics

The paper describes a transformer bridge for the measurement of the impedance parameters of point-contact or junction transistors at 1000c/s. The bridge is simple and rapid in operation and measures both real and imaginary components of the parameters. A modification of the bridge connections measures the components of a simple equivalent circuit of a junction transistor. Further modifications are suggested which will allow for the measurement of admittance parameters or h-parameters, direct measurement of the impedance parameters of junction transistors connected in the common-emitter circuit, or measurements at radio frequencies.