Signal generating system utilizing a cathode ray tube

Details Signal generating system utilizing a cathode ray tube Signal generating system utilizing a cathode ray tube

G - Physics

10

H

84/1.52

G10H 5/00 (2006.01) G10H 5/16 (2006.01) H03B 13/00 (2006.01)

Patent

CA 1054407

ABSTRACT OF THE DISCLOSURE A signal generating system and an electronic organ utilizing a beam tube wherein a PWM (pulse width modulation) representation of a wave shape desired to be reproduced is stored in a memory. An oscillator activated by means such as a manual or pedal key produces frequency f, where f is the frequency of the note selected. This oscillator causes electronic emissions to sweep the pattern of the PMW representation at the fundamental frequency se- lected. The PMW wave shape is read out repetitiously at the generated frequency and converted to an analog form by a low pass filter to produce a tonal quality having the wave shape corresponding to the wave shape stored in the memory.

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