US Audio Multiplexing Decoder - Sony
Description
US Audio Multiplexing Decoder
CXA2194Q
Description The CXA2194Q is an IC designed as a decoder
for the Zenith TV Multi-channel System and also corresponds with I2C bus.
Functions include stereo demodulation, SAP (Separate Audio Program) demodulation, dbx noise reduction and sound processor.
Various kinds of filters are built in while adjustment, mode control and sound processor control are all executed through I2C bus.
Features • Alignment-free VCO and filter • Audio multiplexing decoder
dbx noise reduction decoder sound processor — Two external inputs — Pass switch — Bass control — Treble control — Volume control are all included in a single chip.
Almost any sort of signal processing is possible through this IC.
• Input level, separation adjustments and each mode control are possible through I2C bus.
48 pin QFP (Plastic)
Applications TV, VCR and other decoding systems for US audio
multiplexing TV broadcasting
Structure Bipolar silicon monolithic IC
Absolute Maximum Ratings (Ta = 25°C) • Supply voltage VCC 11 • Operating temperature Topr –20 to +75 • Storage temperature Tstg –65 to +150 • Allowable power dissipation
PD 0.
6
V °C °C
W
Range of Operating Supply Voltage 9 ± 0.
5
V
∗ A license of the dbx-TV noise reduction system is required for the use of this device.
Sony reserves the right to change products and specifications without prior notice.
This information does not convey any license by any implication or otherwise under any patents or other right.
Application circuits shown, if any, are typical examples illustrating the operation of the devices.
Sony cannot assume responsibility for any problems arising out of the use of these circuits.
–1–
E02826
Block Diagram
FEXT1 AUX1-L AUX1-R
MAININ
PCINT1 PCINT2 PLINT SUBOUT MAINOUT
CXA2194Q
–2–
11 12
13
21 9
8 36 35
LFLT
VCO
1/4
FLT
1/2 LPF VCA
MATRIX
COMPIN 14 VCC 19 GND 17
NOISETC 23 SAPTC 18
VCA ATT
LPF
"STEREO" STIND
DeEm
WIDEBAND LPF NRSW/FOMO/SAPC
(+6dB)
LOGIC
BPF
IREF 15 16
...
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