Onkyo TA-RW255 - Equalizer Performance

HA12167FB/HA12169FB
28
The Application of Equalizer Frequency Response
R1
EQ
IN
EQ
VR
GP
Gm 1
+
–
+
–
OP 2
+
–
OP 6
+
–
Gm 2
F/Q
C1
C2
–
+
OP 5
R6
+
–
Gm 3
GLFM
+
–
Gm 4
C3
R9
R10
EQ
OUT
R8
GH
+
–
OP 7
–
+
Gm 5
+
–
OP 3
R5
R4
R7
–
+
Gm 6
–
+
OP 4
Figure 9 REC Equalizer Block Diagram
Transfer Function:
Vout
Vin
G
Gm5
RR
R
1+
C3
Gm4
Gm6
Gm5
S
1+
C3
Gm4
S
Gm1
RR
RR
C3
Gm4
S
1+
R
R
R
RR
C2
Gm3
S+
R
R
C1
Gm2
C2
Gm3
S
9
R
R
1 6.67 10
RR
R
V
810
9
410
67
4
5
7
67
4
5
2
REF
GL
–10
FM GH
GL
=⋅
⋅
⋅
⋅⋅
⋅
+⋅
⋅
+
⋅
⋅
⋅
+
⋅⋅ ⋅⋅⋅












=⋅
+×
⋅
⋅⋅
+× ⋅
+⋅
×⋅⋅
+× ⋅ ⋅ × ⋅ ⋅










S
1 6.67 10
R
S
R
3.0 10
R
S
1 4.5 10
R
S+2.5 10
RR
S
–10
FM
GP
–10
FQ
–11
FQ
–20
FQ F/Q
2
Note: R
REF
....14 pin bias resistance
G
V
......Gain of EQ-VR