Randomized digital/analog converter direct digital synthesizer

Details Randomized digital/analog converter direct digital synthesizer Randomized digital/analog converter direct digital synthesizer

1989-07-17

1991-05-07

Lee, Benny T.

Boots, shoes, and leggings

364721, 328 14, G06F 102

Patent

active

050142313

ABSTRACT:
A sine output or phase interpolation direct digital synthesizer for use in satellite programs having a random or pseudorandom code generator for summing a random digital word whose value ranges from zero to just under the least significant bit of a digital-to-analog converter with the current register value normally sent to the converter for reducing the spurious sidebands associated with the finite resolution of the converter within the synthesizer, the sum being truncated to the resolution of the converter and for controlling the converter, the spurious sidebands being reduced by randomization of the periodic behavior associated with the truncation process while lowering the total phase noise.

REFERENCES:
patent: 4134072 (1979-01-01), Bolger
patent: 4365201 (1982-12-01), Scott et al.
patent: 4410954 (1983-10-01), Wheatley, III
patent: 4482974 (1984-11-01), Kovalick
patent: 4536718 (1985-08-01), Underhill
patent: 4599579 (1986-07-01), McCann

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