Large bandwidth analog isolation circuit

Details Large bandwidth analog isolation circuit Large bandwidth analog isolation circuit

1998-06-04

1999-10-12

Pascal, Robert

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 61, 330 10, 330 59, H02M 3335, H02M 318, H03F 338, H03F 1700

Patent

active

059662972

ABSTRACT:
A large bandwidth analog isolation circuit is disclosed. Isolation transformers (11, 12) isolate the nonfloating side on the right hand from the floating side on the left hand. The input signal (1a, 1b) and a high frequency sinusoidal signal (3a, 3b) via a transformer (16) from an oscillator (18) are applied to a multiplier (20). The floating multiplied signal is supplied to a nonfloating multiplier (60). Thereby, the signal (6a, 6b) is multiplied by the high frequency sinusoidal signal (8a, 8b). The nonfloating multiplied signal (9a, 9b) is obtainable and is filtered (67, 68) to send out the output signal (2a, 2b) reproduced from the input signal (1a, 1b). Thus, replica of the input signal is obtained in the nonfloating side.

REFERENCES:
patent: 4050028 (1977-09-01), Vosteen
patent: 4439821 (1984-03-01), Grippe
patent: 4937468 (1990-06-01), Shekhawat et al.
patent: 4945464 (1990-07-01), Gunn
patent: 5519306 (1996-05-01), Itoh et al.

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