Audio Signal Processor
Description
HA12230NT
Audio Signal Processor for Cassette Deck
ADE-207-322E (Z) 6th Edition Nov.
2000 Description
HA12230NT is silicon monolithic bipolar IC providing PB equalizer, REC equalizer system and each electronic control switch in one chip.
Functions
• PB equalizer • REC equalizer × 2 channel × 2 channel
• MS use Mixing Amp.
• Each electronic control switch to change tape type and mute etc.
• REC mute • REC head return switch • Line Amp.
• Line mute
Features
• REC equalizer is very small number of external parts, built-in 2 types of frequency characteristics • PB equalizer circuit built-in • REC/PB are possible with TYPE I/II • Controllable from direct micro-computer output • Available to reduce substrate-area because of high integration and small external parts
HA12230NT
Pin Description, Equivalent Circuit (VCC = 12 V, Ta = 25°C, No signal, The value in the table show typical value.
)
Pin No.
17 16 Pin Name VCC RECOUT(L) Note V = VCC V = VCC/2
VCC
Equivalent Circuit
Pin Description VCC pin REC-EQ output
GND
15 10 1 30
RECOUT(R) MAOUT VREF REC-RETURN V = V’ = VCC/2
VCC
MS Amp.
output Reference REC return
V pin 3, pin 29 I GND
, 30 V
29 3 28
BIN(L) BIN(R) AIN(L) V = VCC/2 VCC
PB B deck input
PB A deck input
PB-NF 4 11 AIN(R) MAI V = VCC/2
MAOUT 100 k V 45 k VCC/2 VCC
MS Amp.
input
Rev.
6, Nov.
2000, page 2 of 32
HA12230NT
Pin Description, Equivalent Circuit (VCC = 12 V, Ta = 25°C, No signal, The value in the table show typical value.
) (cont)
Pin No.
23 Pin Name PBOUT(L) Note V = VCC/2 Equivalent Circuit
VCC
Pin Description PB output
V
GND
9 25 7 26
PBOUT(R) EQOUT(L) EQOUT(R) PB-EQ(L) V = VCC/2
VCC
EQ output (120 µ) EQ output (70 µ)
V EQOUT GND
6 13
PB-EQ(R) RECIN(R) V = VCC/2
VCC
REC-EQ input
100 k VCC/2
18 24 8 19
RECIN(L) TAI(L) TAI(R) MUTE I = 20 µA
I VCC
Tape input
Mode control input
22 k 100 k GND
20 21 22
A 120/70 A/B B I/II
Rev.
6, Nov.
2000, page 3 of 32
HA12230NT
Pin Description, Equivalent Circuit (VCC = 12 V, Ta = 25°C, N...
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