Electronic tone generator

Details Electronic tone generator Electronic tone generator

1978-10-18

1981-01-13

Miska, Vit W.

Horology: time measuring systems or devices

Chronological

With simultaneous time indicating means

368273, 84 103, 84 119, 84 101, G04B 2102, G10H 100

Patent

active

042453364

ABSTRACT:
A digitized multifrequency tone generator comprising a memory having N readable word locations with each location containing an amplitude representing binary word, and with the total N binary words sequentially and collectively representing a period T.sub.o of the waveform of a multifrequency tone such as a chime with certain harmonics contained therein. Memory scanning signals of frequencies Nf.sub.o, where f.sub.o =f.sub.1, f.sub.2 . . . f.sub.n, are each employed, one at a time in a predetermined chime sequence, to repeatedly and sequentially read the N words from the memory to form a sequence of chimes each of whose fundamental tone frequencies is equal to the employed scanning frequency f.sub.o =f.sub.o1, f.sub.o2 . . . f.sub.n, with the said harmonics being reproduced at the proper frequency relative to each scanning frequency. A digital-to-analog device converts the read out binary words to form the aforementioned waveform. Logic means are provided to control the duration and decay characteristics of each generated tone.

REFERENCES:
patent: 3610800 (1971-10-01), Deutsch
patent: 3854365 (1974-12-01), Tomisawa et al.
patent: 4003003 (1977-01-01), Haeberlin
patent: 4053839 (1977-10-01), Knoedl, Jr.
patent: 4063484 (1977-12-01), Robinson
patent: 4073133 (1978-02-01), Earls et al.
patent: 4098071 (1978-07-01), Kanakami et al.
patent: 4149440 (1979-04-01), DeForeit

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