BAND-PASS TUNEABLE FILTER Russian patent published in 1996 - IPC

FIELD: satellite television receivers, heterodyne and other SHF receivers with electrically tuneable service frequency band. SUBSTANCE: the device uses a resonant circuit with a quasilumped inductance and two L-section series-parallel chains of two capacitors. The point of connection of capacitors of one of the chains is connected to the first lead of the quasilumped inductance. The first lead of the additional quasilumped inductance is connected is connected to the point of connection of capacitors of the second chain, and the varactor diode is series- connected between the second leads of the quasilumped inductances. EFFECT: improved design. 7 dwg