Electronic bell tone generator

Details Electronic bell tone generator Electronic bell tone generator

1993-03-03

1995-07-11

Witkowski, Stanley J.

Music

Instruments

Electrical musical tone generation

84624, 84649, 84694, G10H 5710, G10H 700

Patent

active

054322944

ABSTRACT:
A microprocessor provides a pulse width modulated pulse train at a predetermined frequency to a tuned resonant circuit having a transducer element. The first pulse has a predetermined width. The pulse widths of successive pulses are decreased in a predetermined manner until the pulse width reaches a minimally desired width. The next generated pulse has the first predetermined width and each successive width is decreased in the same predetermined manner. This pattern is generated repeatedly. Each one of these generated patterns produces an audible waveform from the tuned resonant circuit which changes over time. If the pulse train frequency, the pulse width modulation, and the circuit's resonant frequency are chosen correctly, the audible waveform will have the same characteristics as the waveform produced by a specified bell which has been struck.

REFERENCES:
patent: 4183278 (1980-01-01), Rea et al.
patent: 4250787 (1981-02-01), Segan et al.
patent: 4290334 (1981-09-01), Kramer
patent: 4373416 (1983-02-01), Endo et al.
patent: 4953437 (1990-09-01), Starkey
patent: 5208414 (1993-05-01), Yamada

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