Half-wave signal isolator with means for controlling flux in the

Details Half-wave signal isolator with means for controlling flux in the Half-wave signal isolator with means for controlling flux in the

1980-11-03

1983-07-26

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307261, 330 10, 328170, H03K 508

Patent

active

043956475

ABSTRACT:
A signal isolator including a coupling transformer with modulate/demodulate switches in series with the primary and secondary windings. The switches are driven in synchronism by an oscillator. Resonating capacitors are connected in parallel with the transformer windings to form an LC tank circuit tuned approximately to the operating frequency of the switch-drive oscillator. When the switches are closed, the current in the transformer windings ramps in a linear fashion in response to application of the input voltage, and when the switches are opened, the current varies in a cosine curve to provide smooth transitions at both ends to the ramp current, thus controlling the flux in the transformer core so as to minimize instability effects.

REFERENCES:
patent: 2057998 (1936-10-01), Bohm
patent: 3229122 (1966-01-01), Engle
patent: 4066974 (1978-01-01), Reinhard

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