Accession Number:

AD0652877

Title:

A PASSIVE METHOD OF IMPROVING COMMON-MODE REJECTION,

Descriptive Note:

Corporate Author:

HARRY DIAMOND LABS WASHINGTON D C

Personal Author(s):

• Krey,Karl H.

Report Date:

1967-04-01

Pagination or Media Count:

37.0

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 12-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