TA1343N
TOSHIBA Bipolar Linear IC Silicon Monolithic
TA1343N
TV Sound Processor
TA1343N is a sound processor controlled by I
2
C bus. It
incorporates the following: 2-channel input, 3-channel output
signal processing circuit, phase shift circuit for surround, and
LPF for woofer channel.
ALS (Automatic Level Suppresser) circuit which prevents
distort the signal in large signal condition for woofer channel is
also incorporated
Features
·
Sound processing circuit
·
2 ch inputs (Lch, Rch)
·
3 ch outputs (Lch, Rch, Wch)
·
Input matrix switch
·
Volume control
·
Bass, treble, and balance adjustment
·
Woofer level and surround effect level adjustment
·
ALS (automatic level suppresser) circuit
·
Built-in LPF for bass boost
·
Surround circuit
·
Phase shift surround system
·
2 modes stereo surround
·
Pseudo stereo mode
Weight: 1.22 g (typ.)
1
2002-02-12
TA1343N
Block Diagram
Treble HPF (L)
Woofer LPF3
Woofer LPF2
Woofer LPF1
Volume Filter
Bass LPF (L)
Woofer Filter
24
2
23
22
21
20
19
ALS SW
AGC
Det
+
0dB
/-5dB
18
17
16
+
15
14
I C bus
interfaxe
Level
Control
DAC
Rch Output
13
+
12
Wch Output
Bass boost SW
V
CC
(9 V)
Lch Output
SDA
SCL
L.P.F
L-R Level
Control
L.P.F
Woofer
Level
Control
Bass&
Treble
Control
4
f
f
Phase sifter
-
+
-
0dB
/-5dB
Input matrix
Bias
Reg.
1
O.C.
2
B4
B3
3
B2
4
5
B1
Lch Input
6
GND
7
Rch Input
8
Bias Filter
9
10
Bass LPF (R)
Treble HPF (R)
Volume&Balance
Control
11
Bass&
Treble
Control
2
2002-02-12
TA1343N
Terminal Function
Pin
No.
Name
Function
Interface Circuit
DC offset canceling filter for bass boost.
1
Offset canceling filter
Connect a capacitor (10
mF)
between this
terminal and GND.
1
100
W
30 kW
7
20
2
3
4
5
f4
f3
f2
f1
Terminals for capacitors of the phase shift
blocks.
Value of phase shift each block is
-1
f
deg.
= -2tan
(2
p
fCR)
C is capacitance of external
capacitor
R is resistance of internal resister
(10 k
W
(typ.)).
2
3
4
5
100
W
10 k9
7
20
24 kW
6
8
Lch Input
Audio input terminals.
Rch Input
56 k9
56 k9
9
7
4.5 V
7
7
GND
GND terminals.
20
Filter for noise rejection of the bias.
9
Bias Filter
Connect a capacitor (4.7
mF)
between this
terminal and GND.
6
8
24 kW
3
2002-02-12
1 k9
20
TA1343N
Pin
No.
Name
Function
Interface Circuit
20
10
15
Bass LPF (R)
Bass LPF (L)
LPFs for bass control circuits.
Connect capacitors (0.027
mF)
between
each terminals and GND.
10
15
100
W
22 kW
22 k9
4.5 V
22 kW
22 k9
7
7
20
17
18
19
2 kW
7
1 mA
12
13
16
100
W
100
9
20
7
20
11
14
Treble HPF (R)
Treble HPF (L)
HPFs for treble control circuits.
Connect capacitors (8200 pF) between
each terminals and GND.
11
14
11 kW
12
13
16
Wch Output
Rch Output
Lch Output
Audio output terminal.
LPFs for bass boost circuit.
17
18
19
Woofer LPF 1
Woofer LPF 2
Woofer LPF 3
Connect a capacitor (0.033
mF)
between
terminal 17 and GND.
Connect a capacitor (0.047
mF)
between
terminal 18 and GND.
Connect a capacitor (0.022
mF)
between
terminal 19 and GND.
V
CC
terminal.
20
V
CC
Recommended operation voltage is 9 V
±10%.
4
2002-02-12
4.5 V
TA1343N
Pin
No.
Name
Function
Interface Circuit
20
I
2
C Bus
Control
Smoothing filter for volume control.
21
Volume Filter
Connect a capacitor (0.01
mF)
between
this terminal and GND.
21
7
20
Smoothing filter for bass boost level
control.
22
Woofer Filter
Connect a capacitor (3.3
mF)
between this
terminal and GND.
This filter is also for ALS circuit.
7
22
I
2
C Bus
Control
20
23
SCL
SCL terminal.
23
2.3 V
7
20
24
SDA
SDA terminal.
24
2.3 V
7
5
2002-02-12
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