Wave transmission lines and networks – Coupling networks – Equalizers
Patent
1976-03-12
1977-06-28
Lieberman, Eli
Wave transmission lines and networks
Coupling networks
Equalizers
333 32, 333 70CR, 333 77, 333 81R, H03H 710, H03H 716, H03H 738, H04B 0314
Patent
active
040328660
ABSTRACT:
A low loss corrective network for obtaining a desired overall frequency response comprises a plurality of tunable resonant circuit stages which are operative for modifying the frequency response over respective portions of the frequency spectrum. Each resonant stage comprises a variable differential capacitor having two stator plate input terminals and a rotor plate output terminal. Each stator plate input terminal is connected to respective end terminals of a source. A single voltage divider common to all of the stages has two end terminals which are connected with the source and which are also commonly connected with all of the respective stator plate input terminals of the individual stages, and a tap point located intermediate the end terminals of the divider which is commonly connected with all of the respective rotor plate output terminals of the individual stages. Moreover, matching resistors and inductors are employed to compensate for the capacitive loading presented by the differential capacitors. Finally, decoupling resistors are connected between the respective rotor plate output terminals of successive pairs of resonant stages.
REFERENCES:
patent: 2024900 (1935-12-01), Wiener et al.
patent: 2682037 (1954-06-01), Bobis et al.
patent: 3325753 (1967-06-01), Shearer et al.
patent: 3336539 (1967-08-01), Kwartiroff et al.
patent: 3750052 (1973-07-01), Hermanutz
Lieberman Eli
Nussbaum Marvin
Striker Michael J.
Tekade Felten & Guilleaume Fernmeldeanlagen GmbH
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