Device for optionally realizing two mutually complementary funct

Details Device for optionally realizing two mutually complementary funct Device for optionally realizing two mutually complementary funct

1975-10-02

1977-01-04

Gensler, Paul L.

Wave transmission lines and networks

Amplitude compression and expansion systems

307264, 307296, 330 29, H03G 706

Patent

active

040017311

ABSTRACT:
A switchable compression-expansion device, in which a first and a second impedance are included in the emitter circuits of two emitter followers. The impedances are also included in two isolated signal circuits which are coupled via a current mirror circuit. A selection means maintains one of the two emitter followers in the non-conducting state. The current which is produced in the associated impedance by the conducting emitter follower is coupled to the other impedance by the current mirror arrangement. In the other condition of the selection circuit the reverse occurs so that two complementary transfer functions are realized.

REFERENCES:
patent: 3932768 (1976-01-01), Takahashi et al.

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