m62493fp Mitsumi Electronics, Corp., m62493fp Datasheet - Page 13

• Manufacturer Part Number: m62493fp
• Description: Digital Sound Controller
• Manufacturer: Mitsumi Electronics, Corp.

Communication function is ;
VOUT
VIN
VIN
(3) BASS BOOST EQUIVALENT CIRCUIT
D - M6249Q - 810-B
Orginal return type 2 dimensions HPF circuit of Bass boost.
=
Bass boost consists of orginal return type 2 dimensions HPF circuit of upper figure.
To the following showing an example of method of design calculction of Bass boost.
At the time of ;
C 1 = C 2 = C f, K = +1
The upper expression becomes ;
R f = 1 / ( w0 C f ) • • • • (1)
R 1 = R f / 2 Q • • • • • • • (2)
R 2 = 2 Q R f • • • • • • • (3)
s +s
2
C 1
0.1µ
R2C1
1
C 2
R 2
0.1µ
+
R2C2
1
200K
+(1-K)
R 1
Ks
+K
2
3.0K
R1C1
1
+
R1R2C1C2
Bass boost
Q=4,fc= 70Hz
MITSUBISHI
ELECTRIC
1
When cut off frequency is 70Hz ,
w0=2 x 70Hz, Q=4,condition.
VOUT
At the time of ; C1=C2=C f=0.1µF
From ; (1),(2),(3)
Become ; R f=22.7 K
R1,R2 is about 3.0K ,200K
MITSUBISHI SOUND PROCESSORS
0 dB
GO
DIGITAL SOUND CONTROLLER
w
Q=
Amplitude characteristic of HPF
R2 = 182 K
R1 = 2.84K
0
M62493FP
2
R2C2
R1C1
=
Q
10
1
2
4
5
f 0
R1R2C1C2
+
1
Q=4 (G=10dB )
R1C2
R2C1
1
(Reference)
+(1-K)
0 to 1
6
10
13
20
GO
(
13
/
dB
dB
dB
dB
dB
R2C2
18
R1C1
)