Cable equalization resonant amplifier circuit

Details Cable equalization resonant amplifier circuit Cable equalization resonant amplifier circuit

1977-07-01

1978-05-02

Dahl, Lawrence J.

Amplifiers

With semiconductor amplifying device

Including frequency-responsive means in the signal...

330 53, 330294, 330302, 330306, 333 28R, H03F 304, H03H 500

Patent

active

040877620

ABSTRACT:
A cable equalization resonant amplifier circuit for compensating for the signal-attenuation effects of a coaxial cable connected with the amplifier circuit and having a length of up to one-half mile. The gain of the amplifier circuit is matched with the attenuation characteristics of the coaxial cable over a wide range of frequencies by employing an LC resonant circuit with a Q of approximately 1 in the emitter circuit of an amplifying transistor. The gain for the amplifier circuit is established to match the attenuation characteristics of the coaxial cable at low frequencies by an RC circuit coupled with the amplifying transistor and the LC resonant circuit. The maximum or peak desired value of gain for the amplifier circuit at the resonant frequency of the LC resonant circuit is established by a resistor connected in series with the LC resonant circuit and a resistor in the collector circuit of the amplifying transistor.

REFERENCES:
patent: 3341786 (1967-09-01), Stull, Jr.
patent: 3456206 (1969-07-01), Kwartiroff et al.
patent: 3581122 (1971-05-01), Gaunt, Jr.

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