NTE15023
Integrated Circuit
dbx TV Noise Reduction Integrated Circuit
Description:
The NTE15023 is an integrated circuit designed for the dbx–TV noise reduction decode circuit for mul-
tichannel TV sound systems. This device contains a voltage controlled amplifier, a variable de–em-
phasis circuit with new configuration and RMS detectors with completely integrated active band pass
filters, and offers the complete dbx–TV noise reduction decoder only with a few external components.
Features:
D Integrated Band Pass Filters using Active Filtering Technique and Thin Film Structure with
High Capacitance
D Variable De–emphasis Circuit with New Circuit Configuration
D Minimum Number of External Components
D Wide Operation Voltage Range: 4.7V to 16V
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Power Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17V
Allowable Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 715mW
Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +75°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C
Recommended Operating Voltage:
Power Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V to 15V
Electrical Characteristics: (TA = +25°C, VCC = +9V Reference Level: 0dB = –5dBm (436mVrms)
unless otherwise specified)
Parameter
Consumption Current
Decode Characteristics
Symbol
Test Conditions
Min
4.0
5.5
Typ
5.0
7.0
Max Unit
I
6.3
8.5
mA
dB
dB
dB
dB
dB
dB
dB
dB
dB
No Signal
CC
V –1
od
Vi = –5dB, f = 300Hz
Vi = –15dB, f = 300Hz
Vi = –30dB, f = 300Hz
Vi = 0dB, f = 1kHz
V –2
od
–14.5 –13.0 –11.5
–44.5 –43.0 –41.5
V –3
od
V –4
od
1.3
3.3
5.3
V –5
od
–19.4 –17.4 –15.4
–39.6 –37.6 –35.6
Vi = –10dB, f = 1kHz
Vi = –20dB, f = 1kHz
Vi = 0dB, f = 8kHz
V –6
od
V –7
od
–4.3
–1.8
0.7
V –8
od
–30.9 –28.4 –25.9
–45.2 –42.7 –40.2
Vi = –10dB, f = 8kHz
Vi = –20dB, f = 8kHz
V –9
od