Accession Number : AD0652877

Title :   A PASSIVE METHOD OF IMPROVING COMMON-MODE REJECTION,

Corporate Author : HARRY DIAMOND LABS WASHINGTON D C

Personal Author(s) : Krey,Karl H.

Report Date : APR 1967

Pagination or Media Count : 37

Abstract : Theory and experimental results are given which show that considerable common-mode rejection can be achieved with a passive magnetic device. Equations are developed which give the characteristics of differential and common-mode input impedances. Rejection ratios as high as 80 dB were obtained experimentally. For frequencies extending from 10 Hz to 10 MHz, the common-mode rejection was in excess of 53 dB. Simultaneously, differential-mode signals of approximately the same frequency range were passed without distortion and with less than 1/2-dB attenuation. Rectangular pulses of 20-nsec rise time were also passed in the differential mode without noticeable distortion. The given results can be improved substantially in specific applications.

Descriptors :   (*ELECTROMAGNETIC PULSES, *TRANSFORMERS), (*DATA PROCESSING, *INPUT OUTPUT DEVICES), MAGNETIC CORES, BROADBAND, IMPEDANCE, VOLTAGE, INTERFERENCE, ATTENUATION, DISTORTION, SIGNALS, HIGH FREQUENCY, COILS, RELIABILITY(ELECTRONICS), FUNCTIONS(MATHEMATICS)

Subject Categories : Electrical and Electronic Equipment
      Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE