Beckman Instruments, Inc.

Frank A Ruegg

William A Vitriol

A screen printed capacitor to provide a predetermined temperature coefficient of capacitance. The capacitance device utilizes a common electrode with a uniform dielectric layer in conjunction with two side-by-side base electrodes resulting in opposite polarity temperature coefficient of capacitance values. The proportion of the area of each of the side-by-side base electrodes with respect to each other determines the predetermined temperature coefficient of capacitance required.

Predetermined temperature coefficient capacitor

An active filter for electronic circuits comprising a single frequency bandpass filter including two stages each comprising a differential input high performance operational amplifier with the output of a second stage being connected in feedback relationship to one input of the first stage and the output of the first stage being interconnected with one input of the second stage. The output of the filter circuit is taken from the output of the first stage of the amplifier and the input to the filter circuit is the negative input of the first stage of the amplifier.

Growing community of inventors

Brea, CA, United States of America

Frank A Ruegg