Broadband amplifier
AssigneeGTE Sylvania Incorporated
InventorFrederick Frank Reed
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Abstract
A broadband amplifier with a negative feedback circuit having a variable resistance means and first and second parallel resistor-inductor combinations for slope control is shown. The variable resistance means establishes the overall frequency response and can be electronically varied to provide automatic gain control. The first and second parallel resistor-inductor combinations provide compensation for deviations from the desired frequency response over respective first and second frequency ranges.
Claims12
A broadband amplifier having a negative feedback path from the collector to the base of a transistor including a series connection of a resistive means and a first parallel combination of a first resistor and first inductor for providing the amplifier with a gain approximately proportional to the square root of frequency, the improvement comprising a second parallel combination of a second resistor and a second inductor connected in series with said first parallel combination in said negative feedback path, said second parallel combination having a resistance-to-inductance ratio lower than the ratio of said first parallel combination.
In a broadband amplifier for amplifying signals in a predetermined range of frequencies coupled thereto via a segment of coaxial cable, an amplifier with a gain for substantially compensating for the attenuation of said signals by said coaxial cable as a function of frequency, said amplifier including a transistor and a negative feedback path defined by a resistive means and a parallel combination of a first inductance means and first resistor connected in series with said resistive means, the improvement comprising a parallel combination of a second inductance means and second resistor connected in series with said resistive means for compensating for deviations from the desired frequency response in a range of frequencies less than a predetermined frequency.
Dependencies are inferred from the claim text.