Switching circuit for AC bias signal

Details Switching circuit for AC bias signal Switching circuit for AC bias signal

1984-03-06

1986-04-01

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Signal switching

360 68, G11B 1512, G11B 502

Patent

active

045801770

ABSTRACT:
A switching circuit for AC bias signal has an input terminal for inputting an input signal into the switching circuit and a first transistor connected to the emitter of the input terminal. A second transistor is connected at the collector to the collector of the first transistor. The emitter area of the second transistor is larger than that of the first transistor so that the dynamic resistances of the these transistors are equal to each other when these resistors are ON state. The emitter of the second transistor is connected to the reference voltage terminal supplied with ground voltage. The first and second transistors are controlled in conduction by a control signal as input.

REFERENCES:
patent: 4342006 (1982-07-01), Ishigaki
patent: 4510459 (1985-04-01), Guisinger

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