Electronic circuit having its impedance controlled by an externa

Details Electronic circuit having its impedance controlled by an externa Electronic circuit having its impedance controlled by an externa

1977-07-22

1980-09-02

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307230, 307237, 333 14, 333 81R, 333217, H03K 114

Patent

active

042208750

ABSTRACT:
This disclosure relates to an electronic circuit which has a controllable impedance. This type of circuit is well suited for application in noise suppression circuits or in signal compression/expansion circuits. The circuit has two stages. The first stage is a voltage to current converter. The second stage is a variable gain current amplifier. The output of the second stage is connected by a feedback loop to an input of the first stage. The circuit has a variable impedance which can be controlled by an external signal. The imput impedance of the circuit is linearly related to the applied control signal.

REFERENCES:
patent: 3539826 (1970-11-01), Crouse
patent: 4039981 (1977-08-01), Ohashi et al.

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