Electric field noise eliminating circuit in a video display appl

Details Electric field noise eliminating circuit in a video display appl Electric field noise eliminating circuit in a video display appl

1998-02-13

1999-11-16

Shingleton, Michael B

Electric lamp and discharge devices: systems

With electromagnetic wave radiation preventing or shielding...

315 8, 361149, H05B 3702

Patent

active

059864060

ABSTRACT:
The present invention relates to a circuit for eliminating radiated electric field noise in a video appliance which can completely offset radiated electric field noise generated on the front face of the CRT by variably adjusting and applying the waveform signal, the amplitude and phase of which are opposite to those of the radiated electric field noise formed on the front face of the CRT. The circuit for eliminating radiated electric field noise according to the present invention includes a high voltage ripple offset section including a cylindrical core, wherein a high voltage lead wire of the FBT passes through the cylindrical core, for eliminating a ripple component of the high voltage applied to the anode of the CRT according to the negative polarity pulse signal from the FBT induction coil, and an electric field noise offset section operable to offset the radiated electric field noise generated from the front face of the CRT by applying the negative polarity pulse signal to the periphery of the CRT.

REFERENCES:
patent: 5151635 (1992-09-01), Cappels
patent: 5243262 (1993-09-01), Moen
patent: 5404084 (1995-04-01), Onodera et al.
patent: 5563476 (1996-10-01), Smith et al.
patent: 5726538 (1998-03-01), Jackson et al.
IBM Technical Disclosure Bulletin vol. 3, No. ? May 1988 pg. 9 & 10.

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