Signal input circuit with controlled input signal attenuation

Amplifiers – With semiconductor amplifying device – Including gain control means

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Details

333 81R, 330145, H03G 318

Patent

active

044940769

ABSTRACT:
A signal input circuit comprising a control member for the controllable attenuation of the input signal and firmly set reactances for the selection of the input signal, wherein the reactances are connected and dimensioned in such a way that there exists a circuit point which has a large impedance compared to the impedance of the signal source, and the control member acts upon this circuit point.

REFERENCES:
patent: 4019160 (1977-04-01), Kam
patent: 4378536 (1983-03-01), Schwarzmann
Siemens, "Semiconductor Circuitry Examples", 1972/73, pp. 38 to 41.

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