cxa1102m Sony Electronics, cxa1102m Datasheet - Page 12

• Manufacturer Part Number: cxa1102m
• Description: Dolby B Type Noise Reduction System
• Manufacturer: Sony Electronics

4) MPX filter termination and C
5) Application for dubbing cassette decks
Switchable Processor with Single Supply
Note 1) Resistor and capacitor tolerances are ±10% and ±20% respectively unless otherwise specified.
Note 2) When resistors RT are connected to Pin 4 for the MPX filter termination, increase the capacitances of
The MPX (multiplex) filter termination method shown in Fig. a-3 allows saving the coupling capacitors
between the buffer amplifiers and MPX filters. However, the channel to channel separation and REC to PB
crosstalk of low frequency signals will be degraded by the termination resistor RT. For example, 5k
will degrade the channel to channel separation to 50dB. Better separation can be obtained by increasing
the capacitance of C
The allowable minimum value of C
of C
The CXA1100 series generates non decoded signal at the recoding output in the decode mode, and can
simplify the structure of dubbing decks. See the SONY' Dolby B/C type IC (CX20187/CXA1097Q or
CX20188/CXA1098Q) data sheet in detail.
1
C
are generally desirable in order to improve the crosstalk and ripple rejection ratio.
1
and C
(–30dBm)
(–30dBm)
(–30dBm)
(–30dBm)
REC IN
REC IN
PB IN
PB IN
Input
Input
Line
Line
11
V
CC
(C
21
1
) to 470µF and 4.7µF respectively.
(Pin 4) to 220µF or 470µF.
Buffer
Buffer
Filter
Filter
C11
1µ
MPX
MPX
1
for Vcc/2 (Pin 4)
C22
C21
C12
1µ
1µ
1µ
R
R
T
T
1
is 47µF, and 100µF is the standard recommended value. Larger values
MPX
MPX
Filter
Filter
MPX
MPX
Filter
Filter
16
1
15
2
4.7µ
4.7µ
100µ
C11
C21
REC
C2
R
R
Fig. a-3.
T
T
– 12 –
PB
14
3
REC/PB
13
4
100µ
OFF
R2
10k
R1
(12
%)
43k
C1
12
5
NR
ON/OFF
ON
C3
10µ
11
6
16
1
10
7
CXA1100 Series
C23 (10%)
0.68µ
C13 (10%)
0.68µ
15
2
8
9
CXA1100/CXA1101/CXA1102/CXA1163
4.7µ
C24
4.7µ
C14
14
3
4.7µ
C15
4.7µ
C25
LINE OUT
REC OUT
(–10dBm)
13
LINE OUT
REC OUT
4
C1
470µ
of R
1