LAG668 Datasheet, PDF (4/5 Pages) Mitsumi Electronics, Corp. – IC for Headphone Stereos (bass boost)

MITSUMI
Application Circuits
IC for Headphone Stereos (bass boost) LAG668
Bass Boost Power Amp Gain
GV ⁴⁰
GVH
35
3dB
30
B^•B ON
25
GVL
3dB
B^•B Off
15
10¹ 10² 10³ 10⁴ 10⁵ 10⁶
f1 f2
Frequency (Hz)
GV : Power amp gain
GVH : Bass boost power amp gain
(high level)
GVL : Bass boost power amp gain
(low level, or boost off)
f1, f2: Cutoff frequencies
( ^GVH=GV+20Log
R3
R1+R3 ^(dB)
( ^GVL=GV+20Log
R2//R3 R1
R2//R3+ R1 ^(dB)
f1=
1
(Hz)
2π ((R1//R3) +R2)C
f2= ¹
(Hz)
2πR2C