DATA ACCESS ARRANGEMENT USING A HIGH FREQUENCY TRANSFORMER FOR ELECTRICAL ISOLATION

Title:

DATA ACCESS ARRANGEMENT USING A HIGH FREQUENCY TRANSFORMER FOR ELECTRICAL ISOLATION

Document Type and Number:

WIPO Patent Application WO2003098644

Kind Code:

A3

Abstract:

An electrical isolation barrier for use in a Data Access Arrangement uses a high frequency (HF) transformer (24) to provide isolation. An input signal (21), which may be analog or digital, is connected to a modulator (22). The analog output of the modulator (22) is connected to the input of the HF transformer (24). The output of the HF transformer (24) is connected to the input of a demodulator (26). Simple amplitude modulation can be used in the modulator (22) to modulate the input signal (21) to the frequency range of operation of the HF transliormer (24). A simple low pass filter may be incorporated in the demodulator (26) to remove harmonic distortion caused by the HF transformer (24). The output signal (27) of the demodulator (26) is substantially the same as input io signal (21).

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Inventors:

DONG PING
COOKMAN JORDAN C

Application Number:

PCT/US2003/014949

Publication Date:

January 22, 2004

Filing Date:

May 12, 2003

Export Citation:

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Assignee:

ESS TECHNOLOGY INC (US)

International Classes:

H04B3/00; H04B3/03; H04J3/04; H04L25/00; H04L25/02; H01F; (IPC1-7): H04B3/00; H04L25/00

Foreign References:

US6385235B1	2002-05-07
US6021158A	2000-02-01
US4912723A	1990-03-27
US5640433A	1997-06-17
US6137827A	2000-10-24
USRE35104E	1995-11-28
US5123012A	1992-06-16

Other References: