Tone output device and integrated circuit for tone output

Details Tone output device and integrated circuit for tone output Tone output device and integrated circuit for tone output

2006-10-20

2008-09-16

Donovan, Lincoln (Department: 2837)

Music

Instruments

Electrical musical tone generation

C084S604000, C084S609000, C084S615000, C700S094000

Reexamination Certificate

active

07425673

ABSTRACT:
In a tone output device100, an oscillator102outputs a clock141that is emitted by a crystal resonator. A multiplication circuit103outputs a clock142that is generated by multiplying the clock141. A timing control circuit104outputs a timing signal150generated based on the clock142for operations of a CPU105. The CPU105operates in sync with the timing signal150. The DA converter115operates in sync with a signal generated based on the clock141. The timing adjustment circuit114detects deviation of the clock142from the clock141resulting from frequency jitter of the clock142, and prevents occurrence of clock racing.

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patent: 2003/0071746 (2003-04-01), Koyanagi
patent: 2006/0136682 (2006-06-01), Haridas et al.
patent: 9-198045 (1997-07-01), None

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