Microprocessor tone synthesizer with reduced quantization error

Details Microprocessor tone synthesizer with reduced quantization error Microprocessor tone synthesizer with reduced quantization error

G - Physics

06

F

354/67

G06F 1/02 (2006.01) H03B 19/00 (2006.01) H04Q 7/10 (2006.01)

Patent

CA 1129100

- 1 - MICROPROCESSOR TONE SYNTHESIZER WITH REDUCED QUANTIZATION ERROR Abstract The accuracy of a required tone set, digitally synthesized by a microprocessor, is improved beyond the theoretical limit of the microprocessor circuitry by producing each tone at a frequency which is a sub-multiple of the desired frequency, then multiplying to provide the desired frequency. With the addition of a multiplier such as a doubler, a better choice of oscillator frequency becomes possible which further increases the tone frequency accuracy. The microprocessor can also reduced the start up time and the time between tones, eliminating delays in transmitting a series of coded tones.

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