Digital waveform generator and associated method

Details Digital waveform generator and associated method Digital waveform generator and associated method

1988-12-28

1989-09-19

Harkcom, Gary V.

Boots, shoes, and leggings

H03M 186

Patent

active

048687740

ABSTRACT:
The present invention relates to synthesis of an analog waveform representative of digital input words but subject to band limiting. In a device for performing such a synthesis a plurality of samples, obtained from the input words by accessing them in memory at a sampling frequency are filtered by a programmable digital filter to yield a plurality of output words which may be fed to a digital to analog converter at a conversion frequency, the converter producing an analog output representative of the input words.

REFERENCES:
patent: 3997773 (1976-12-01), Van Essen et al.
patent: 4296407 (1981-10-01), Minakuchi
patent: 4349887 (1982-09-01), Crowley
patent: 4472785 (1984-09-01), Kasuga
patent: 4691293 (1987-09-01), Conboy
White, "A Slow Approach to Mechanizing a Fast Digital Interpolation Filter", IEEE Trans. on Audio and Electroacoustics, vol. AU-20, No. 1, Mar. 1972, pp. 90-93.
Hirosaki et al., "A CMOS-VLSI Rate Conversion Digital Filter for Digital Audio Signal Processing", ICASSP84, Proc. of IEEE International Conference on Acoustics, Speech, and Signal Processing, San Diego, CA, USA, Mar. 19-21, 1984, pp. 44.4.1-44.4.4.

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