Vtc Inc.

Jeffrey A Gleason

David E Sutliff

Richard E Hester

An amplifier is compensated for variations in element values. A trim signal is generated based on element values of filter elements of a filter in the amplifier. An RC product in the amplifier is controlled based on the trim signal. The RC product corresponds to a product of a dynamic resistance value of a dynamic resistance element in the filter in the amplifier, and a capacitance value of capacitive elements in the filter. The RC product also determines a pole position of the amplifier. Gain in the amplifier is controlled based on the trim signal so that a desired gain is maintained.

Differentiating amplifier responsive to track locations and variations

Method and apparatus for adjusting the pole positions of a

A bipolar integrated circuit amplifier with a cascode stage has an emitter follower biasing circuit which provides a bias voltage to the cascode stage. The cascode amplifier stage is stabilized by providing a stabilization capacitance across the base-collector junction of the emitter follower in the biasing circuit.

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Minneapolis, MN, United States of America

Jeffrey A Gleason