Multi-frequency digital wave synthesizer for providing analog ou

Details Multi-frequency digital wave synthesizer for providing analog ou Multi-frequency digital wave synthesizer for providing analog ou

1977-08-22

1979-02-27

Chapnick, Melvin B.

Boots, shoes, and leggings

328 14, 364721, G06F 102, G06G 726

Patent

active

041422457

ABSTRACT:
A digital wave synthesizer provides one of a plurality of available analog output signals in response to and corresponding to a digital input signal. Each of the available plurality of analog output signals is made up of n successive segments of periods A and B. Segment information is stored in a logic array in such a manner that the segment number and the desired frequency output provides any of the n segments of any of the plurality of analog output signals with the appropriate A or B period. The successive order of segments is not altered by a change in the digital input signal requiring a change in the output signal frequency. An increase in frequency simply requires that a succeeding segment have a shorter A or B period and that a lower frequency have a longer A or B period. The voltage provided in a voltage distribution network is always the same for a particular number of segments irrespective of the output frequency required. Therefore, when a frequency change is required, there is no voltage shift.

REFERENCES:
patent: 3633017 (1972-01-01), Crooke et al.
patent: 3727037 (1973-04-01), Zorn
patent: 3735269 (1973-05-01), Jackson
patent: 3813528 (1974-05-01), Blanding
patent: 3898446 (1975-08-01), Vatz
patent: 4001557 (1977-01-01), Stephenson
patent: 4024385 (1977-05-01), Richards
patent: 4039806 (1977-08-01), Fredriksson et al.
patent: 4064423 (1977-12-01), Atkisson, Jr.

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