Audio ICs
FCircuit Operation
(1) Overview of BBS
BBS is a system which boosts the low end of the audible
frequency range and at the same time linearly controls
the amount of boost according to the volume to produce
a rich sound without distortion through small diameter
speakers. It also adjusts the gain of the high-frequency
range to attain a balanced sound with natural volume.
(2) Operation of BBS
(1) BBS on
The signal system when BBS is on is shown in Fig. 2.
BA3870
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