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Counter Driven, Sine Encoded Memory Produces 0.75% Distortion Sinewave via D/A Converter

Counter Driven, Sine Encoded Memory Produces 0.75% Distortion Sinewave via D/A Converter

This circuit generates a variable frequency sine wave by continuously clocking a sine coded lookup table memory. The memory’s state is converted to an analog output by a DAC. A strength of this technique is its rapid, high fidelity response to frequency and amplitude change commands.