Level adjustment circuit

Details Level adjustment circuit Level adjustment circuit

2006-09-19

2006-09-19

Woo, Stella (Department: 2614)

Electrical audio signal processing systems and devices

Including amplitude or volume control

C381S107000, C381S109000

Reexamination Certificate

active

07110557

ABSTRACT:
Volume adjustment is performed in small steps at a DSP (12) and volume adjustment is performed in wide steps at electronic volume circuits (18L,18R). Adjustment only by the DSP (12) is performed for a small volume range less than or equal to a predetermined level. For a volume higher than or equal to the predetermined level, fine adjustment by the DSP (12) at the transient period of volume adjustment is combined to reduce the increment of variation so that the volume adjustment is performed gradually.

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patent: 5394476 (1995-02-01), Rollins et al.
patent: 6088461 (2000-07-01), Lin et al.
patent: 6317502 (2001-11-01), Imai
patent: 05-198092 (1993-08-01), None
patent: 07-240647 (1995-09-01), None
patent: 08-250947 (1996-09-01), None
patent: 09-153748 (1997-06-01), None
patent: 99/17442 (1999-04-01), None

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