Digital sine conversion circuit for use in direct digital synthe

Details Digital sine conversion circuit for use in direct digital synthe Digital sine conversion circuit for use in direct digital synthe

1986-11-19

1989-02-28

Harkcom, Gary V.

Boots, shoes, and leggings

364729, G06F 102

Patent

active

048092053

ABSTRACT:
The size, power, and speed constraints in digital sinusoidal waveform generators using values stored in a read-only-memory are alleviated by storing the required values in two smaller read-only-memory devices containing a primary amplitude value and a secondary amplitude value, and a third read-only-memory containing corrective values, the total number of values in the three read-only-memory devices being reduced over the number in a single read-only-memory. The primary and secondary values are combined in accordance with disclosed trigonometric identities in response to a repetitive binary count, and the corrective values are added as determined by logic circuitry responding to the same binary count.

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