HA12237F Datasheet, PDF (7/33 Pages) Renesas Technology Corp – Audio Signal Processor for Cassette Deck

HA12237F
Line Mute
This IC is built-in with mute circuit to Line Amp.
A mute control does with Low/High of pin 14.
Reducing pop noise is so much better 10 kΩ to 22 kΩ resistor to pin 14 in series and 1 µF to 22 µF capacitor.
A mute is not built-in when doing a power ON/OFF.
Please correspond to it, on the side of a set system.
REC Equalizer
REC-EQ gain adjust before the input of this IC.
R_L needs the value more than 5.6 kΩ based on the output at reference input.
Because mode establishment resistances are built-in, REC-EQ frequency characteristics are respectively fixed value.
In vase the change of the frequency characteristics are necessary, please inquire the responsible agent because the
adjustment of resistors is necessary.
Input
R1
15k
RECIN(R)
7 ^25.5mVrms
C2
0.1µ
ALC(R)
8
ALC
R12
R2
2.2k
17
V_CC
10
25dB
453mVrms
EQ
ALC DET
C12
R3
RECOUT(R)
12k
B head
Unit R: Ω
C: F
Figure 4 REC-EQ Block Diagram
Rev.1.00 Jun 15, 2005 page 7 of 32