CATV converter having improved tuning circuits

Telecommunications – Receiver or analog modulated signal frequency converter – Frequency conversion between signal source and receiver

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Details

455191, 455301, 455315, 455340, H04B 118, H03J 126, H03J 116

Patent

active

046190007

ABSTRACT:
The disclosure describes an improved CATV converter that incorporates an intermediate frequency filter and amplifier unit that includes first and second tunable circuits. Each tunable circuit has a fixed capactive element and a variable inductance means for tuning the tunable circuit. The first and second tuned circuit are transmissively coupled to one another through a slit in a shield which otherwise shields one tunable circuit from another. The intermediate frequency filter and amplifier unit also includes an FET for amplifying a narrow band intermediate frequency signal and a third tunable circuit comprising the output capacitance of the FET and a variable inductance means for tuning the third tunable circuit.

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patent: 4520507 (1985-05-01), Moon

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