Pulse generator for an electronic musical instrument

Details Pulse generator for an electronic musical instrument Pulse generator for an electronic musical instrument

1974-09-18

1976-11-23

Witkowski, Stanley J.

Music

Instruments

84DIG11, 307208, 307265, 328 58, 328158, G10H 106, G10H 506

Patent

active

039929736

ABSTRACT:
A pulse generator especially for an electronic musical instrument in which a "D" type flip-flop is employed with the logic level at the data input thereof being transferred to the output in conformity with the supply to the clock input of a fixed frequency rectangular wave and the supply to the clear input of a rectangular wave having a frequency which is a whole multiple of the fixed frequency. The output at the output terminal of the flip-flop is a pulse having a duty cycle of predetermined length. The pulses at the output terminal are, of course, repetitive and remain at the same duty cycle without variation. By using a plurality of the flip-flops, each having respective inputs to the clock and clear terminals, a desired range of pitches can be generated.

REFERENCES:
patent: 3479603 (1969-11-01), Overstreet, Jr.
patent: 3535969 (1970-10-01), Bunger
patent: 3617901 (1971-11-01), Franssen
patent: 3767834 (1973-10-01), Hebeisen et al.
D. O. Pederson et al., Introduction to Electronic Systems, Circuits and Devices, McGraw-Hill Book Company, copyright 1966, p. 191.
Millman & Taube, Pulse, Digital, and Switching Waveforms, McGraw-Hill Book Company, copyright 1965, p. 312.
Morris et al., Designing with TTL Integrated Circuits, Texas Instruments Electronics Series, McGraw-Hill Book Company, copyright 1971, p. 166.

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