Frequency independent ramp generator

Details Frequency independent ramp generator Frequency independent ramp generator

1981-08-10

1984-10-09

Isen, Forester W.

Music

Instruments

328 35, 307228, 307261, 331145, G10H 100

Patent

active

044754272

ABSTRACT:
A tone generator for an electronic musical instrument is operable for producing a highly stable tone signal over an extended frequency range. The tone generator comprises a timing circuit defining first and second time intervals occurring in respective time succession after the occurrence of a transition of an input signal. A timing capacitor is charged during each second time interval and discharged during the time intervals occurring between the end and beginning of successive ones of the second time intervals. A feedback circuit is enabled during each of the first time intervals for coupling the timing capacitor for controlling the discharge rate so that a highly stable ramp output tone signal is produced.

REFERENCES:
patent: 4016496 (1977-04-01), Eastcott
Jung, IC OP-AMP Cookbook, p. 79 (1974).

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