Wave transmission lines and networks – Negative resistance or reactance networks of the active type – Simulating specific type of reactance
Patent
1981-08-17
1983-04-26
Gensler, Paul L.
Wave transmission lines and networks
Negative resistance or reactance networks of the active type
Simulating specific type of reactance
330107, H03H 1108
Patent
active
043814891
ABSTRACT:
In order to facilitate its construction as in integrated circuit, the inductive elements of two resonant circuits in a band-pass filter are each constituted by a first port of a respective gyrator circuit (22, 23 and 24, 25 respectively) the second port of which is loaded by a capacitor (3 and 6 respectively). The first ports, across which are connected capacitors (1 and 3 respectively), are connected by a signal path one to the other, as are the second ports, in such manner that a loop is formed comprising the two gyrator circuits and the two signal paths, enabling bilateral coupling of the two gyrator circuits to be obtained by coupling otherwise unused outputs (24+ and 22+) to otherwise unused inputs (22- and 24- respectively) of two-input two-output voltage-controlled current sources (22, 24) which form part of each gyrator circuit.
REFERENCES:
patent: 3517342 (1970-06-01), Orchard et al.
Moschytz, Inductorless Filters: A Survey, IEEE Spectrum, Sep. 1970, pp. 63, 64 and 65.
Canning, deceased Jonathan R.
Moulding Kenneth W.
Wilson Gordon A.
Briody Thomas A.
Gensler Paul L.
Goodman Edward W.
Streeter William J.
U.S. Philips Corporation
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