Active high Q filter using transistor

Details Active high Q filter using transistor Active high Q filter using transistor

1974-12-27

1976-08-10

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

333 80T, 333 70CR, 307253, 307295, H03K 1700

Patent

active

039743993

ABSTRACT:
Disclosed is a two-terminal active impedance circuit which comprises a transistor having emitter connected to one terminal of the circuit through a resistor, collector and base directly connected to each other, and a capacitor connected between the one terminal and the collector, said base being applied with a bias voltage whereby an imaginary impedance including a negative resistance is provided between the one terminal and other terminal which is connected to the emitter. Active filters having various characteristics are disclosed in which the above impedance circuit are utilized.

REFERENCES:
patent: 3152309 (1964-10-01), Boqusz et al.
patent: 3267397 (1966-08-01), Skinner
patent: 3594593 (1971-07-01), Ho
patent: 3680011 (1972-07-01), Adams et al.

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