Input protection for high bandwidth amplifier

Details Input protection for high bandwidth amplifier Input protection for high bandwidth amplifier

1995-11-07

1997-06-17

Mottola, Steven J.

Amplifiers

With semiconductor amplifying device

Including protection means

327309, 327320, H03F 304

Patent

active

056401272

ABSTRACT:
A high bandwidth amplifier circuit with input protection is achieved by providing a signal limiting diode circuit in the path to the positive input of the amplifier and a cross-over signal feed path for coupling a portion of the input signal from the input signal source side of the signal limiting diode circuit to the negative input of the amplifier. To maximize the overall circuit bandwidth and minimize VSWR and noise, the cross-over signal feed path is designed to couple over to the negative input of the amplifier a signal that has at a higher-end of the bandwidth range an increasing amplitude and increasingly leading phase relationship relative to the amplitude limited version of the input signal being coupled to the positive input of the amplifier. In a desirable embodiment, most of the circuitry is contained on an integrated circuit and bond wires needed for coupling serve as inductors and tune the circuitry.

REFERENCES:
patent: 4495643 (1985-01-01), Orban
patent: 5241282 (1993-08-01), Poole

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