Numerically controlled oscillator

Details Numerically controlled oscillator Numerically controlled oscillator

1991-03-04

1992-08-25

Nguyen, Long T.

Boots, shoes, and leggings

G06F 102

Patent

active

051424878

ABSTRACT:
A numerically controlled oscillator includes a phase accumulator which generates sequences of phase word phase signals. A demultiplexer 104 directs the odd and even numbered phase angle words of the sequence to identical but independent lookup tables to generate corresponding waveform signals. The wave form signals at the output of each lookup table occur at one-half the frequency of the system clock. A multiplexer 108 interleaves the output signals from the lookup tables to provide a properly ordered sequence of waveform signals at the frequency of the system clock. The maximum system clock frequency can be approximately twice the maximum operating frequency of each lookup table.

REFERENCES:
patent: 4454486 (1984-06-01), Hassun et al.
patent: 4602545 (1986-07-01), Starkey
patent: 4710891 (1987-12-01), Debus, Jr. et al.
patent: 4992743 (1991-02-01), Sheffer

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