M62420FP データシートの表示（PDF） - Renesas Electronics
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M62420FP Datasheet PDF : 17 Pages
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M62420SP/ FP/ AFP
Function Explanation
(1) Equivaration Circuit of Tone Control
The resonance circuit is able to construct by using built-in amplifier for simulated inductor. (Shows the constant as
follow)
Incide IC
R3
C1
Center frequency
f0 = 1 / 2π C1 • C2 • R1 • R2 [Hz]
Q = ( C2 • R2 ) / ( C1 • R1 )
R1
C2
(=1.8KΩ)
( EX ) BASS band ( f=100Hz )
R1=1.8KΩ , R2=136KΩ
C1=0.47µF , C2=0.022µF
SIMAMP
R2
(=136KΩ)
ref
FIG1. The circuit used simurated inductor.
ref
L
C1
R3
FIG2. The equivalent circuit used L.
FIG1 is equal to FIG2.
The following relation is concluded.
L=C2 • ER1 • ER2
Rev.1.0, Sep.17.2003, page 6 of 16
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