Electric field emission reduction system

Details Electric field emission reduction system Electric field emission reduction system

1995-03-22

1996-07-09

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315 8, H01J 2956

Patent

active

055347568

ABSTRACT:
An electric field cancellation system comprises a sensor (30) for generating an input signal (I) indicative of an unwanted electric field (E) radiating from a source (3), a variable gain amplifier (5) for amplifying the input signal (I) to produce an output signal (O), a radiator for generating a cancellation electric field (C) in anti-phase to the unwanted field (E) in response to the output signal (O) to at least partially cancel the unwanted field (E), feedback means (10) for generating an error signal (F) indicative of tile difference between the cancellation field (C) and the unwanted field (E), and control means (40) for varying the gain of the amplifier (4) to vary the output signal (O) in response to the error signal (F).

REFERENCES:
patent: 4996461 (1991-02-01), Bentley
patent: 5243262 (1993-09-01), Moen
patent: 5396151 (1995-03-01), Cappels, Sr.
patent: 5432411 (1995-07-01), Beeteson et al.

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