HA12163 Hitachi Semiconductor, HA12163 Datasheet - Page 22

• Manufacturer Part Number: HA12163
• Description: Audio Signal Processor for Car Deck and Cassette Deck (Dolby B-type NR with PB Amp)
• Manufacturer: Hitachi Semiconductor

HA12163 Series
10. PB Equalizer for Double Speed
Rev.4, Jun. 1999, page 22 of 66
PB equalizer can be design for double speed by using external components shown in figure 7.
Application data is shown in figure 8.
60
50
40
30
20
10
R39
180
R38
330 k
20
4.7
+
100
R36
12 k
C25
0.01
R35
5.1 k
R37
18 k
0.015
No
Figure 7 Application Circuit for Double Speed
EQ OUT
EQ
EQ
NFI
RIN
V
FIN
OUT-M
AMP.
R
REF
Frequency (Hz)
Do
1 k
– +
Figure 8 Application Data
22 k
VR1
0.1
TAI
10 k
+
RAI
INPUT AMP.
+
–
*
Please ajust RECOUT level to
be Dolby level with volume of
VR 1.
100 k
No : Normal speed
Do : Double speed
*
OUTPUT = TAIpin
120
70
R = 2.7 k
R = 2.2 k
R = 1.8 k
R = 1.3 k
NR
circuit
PBOUT
No (Normal speed)
Do (Double speed)
RECOUT
Unit R:
C: F