Cable equalization resonant amplifier circuit

Claim 1

A cable equalization resonant amplifier circuit for compensating for the attenuation effects of a coaxial cable on signals transmitted over the coaxial cable, said cable equalization resonant amplifier circuit comprising: an amplifying transistor for amplifying signals over a predetermined frequency bandwidth, said transistor having a base to which the signals transmitted over a coaxial cable are applied, a collector, and an emitter; biasing means coupled with the amplifying transistor and operative to cause the amplifying transistor to conduct and to amplify the signals applied to its base and to present the amplified signals at its collector; resonant circuit means including an inductive element and a capacitive element in the emitter circuit of the amplifying transistor, said inductive and capacitive elements having a predetermined value of Q and a predetermined resonant frequency; matching circuit means in the emitter circuit of the amplifying transistor; said resonant circuit means and matching circuit means being operative, and the Q of the resonant circuit elements being selected, so as to match the gain of the amplifier circuit with the attenuation characteristic of the coaxial cable over the predetermined frequency bandwidth of the signals amplified by the amplifying transistor; peak gain means in circuit with the inductive and capacitive elements of the resonant circuit means and in circuit with the collector of the amplifying transistor and operative to establish the peak value of gain for the amplifier circuit at the resonant frequency of the inductive and capacitive elements; and output circuit means coupled to the collector of the amplifying transistor and operative to apply to an output signals amplified by the amplifying transistor at its collector in accordance with the gain characteristic established for the amplifier circuit by the resonant circuit means, the matching circuit means and the peak gain means.