Method and apparatus for random frequency of tube filament curre

Details Method and apparatus for random frequency of tube filament curre Method and apparatus for random frequency of tube filament curre

1994-08-01

1995-10-31

Pascal, Robert J.

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

315 97, 315105, 315 46, H05B 3702

Patent

active

054632781

ABSTRACT:
Radiated emission is reduced in a vacuum fluorescent tube having a pulsed filament current in a variable frequency range above audible frequencies. A driver circuit produces a fixed width pulse of filament current when triggered by a random frequency generator. The frequency generator comprises a shift register and XOR gates intercoupled to generate a random series of logic outputs, a filter to produce a randomly varying voltage from the logic outputs, and a voltage-to-frequency converter responsive to the filter voltage to yield a random frequency in the required range. The random frequency triggers the driver and clocks the shift register.

REFERENCES:
patent: 4241278 (1980-12-01), Walther

Affiliated with

Also associated with

Rating

Method and apparatus for random frequency of tube filament curre does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for random frequency of tube filament curre, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for random frequency of tube filament curre will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1775232