Electrical audio signal processing systems and devices – Including amplitude or volume control
Patent
1994-11-21
1998-07-21
Harvey, Minsun Oh
Electrical audio signal processing systems and devices
Including amplitude or volume control
381119, H03G 300
Patent
active
057844755
ABSTRACT:
A digital/analog sound synthesizing circuit comprises an RC oscillator outputting a system basic frequency, a timing generator converting the basic frequency into timing signals, a sound synthesizer producing sound numerical code data, and a digital/analog converter outputting an analog signal to drive a speaker. A voltage stabilizing circuit controls the RC oscillator and the digital/analog converter to eliminate sound frequency and volume instability.
REFERENCES:
patent: 4634956 (1987-01-01), Davis
patent: 5268871 (1993-12-01), Dhong
Chen Tsung-Min
Huang Chi-Mao
Lin Yu-chih
Harvey Minsun Oh
United Microelectronics Corporation
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