The NTE1292 is a monolithic integrated circuit in a 14鈥揕ead DIP type package specifically designed
for audio detection in TV and FM radio receivers. It incorporates an 8鈥搒tage limiting IF amplifier and
balanced detector plus a DC operated volume control.
Pin3 and Pin4 are connected to the collector and base of a transistor which may be used as an AF鈥?/div>
preamplifier or as a switch.
At Pin12 a zener鈥揹iode is accessible which can be used to stabilize the supply voltage of this inte-
grated circuit or the voltage of other circuit elements in the set.
Features:
D
Electronic Attenuator: Replaces Conventional AC Volume Control
D
Volume Reduction Range: 85dB Typ
D
Sensitivity: 3dB Limiting Voltage 30碌V Typ
D
Excellent AM Rejection 68dB Typ at 10mV
D
Audio Output Voltage: 1V Typ
D
Wide Supply Voltage Range: V
CC
= 6V to 18V
D
Internal Zener Diode Regulator
D
Very Low External Component Requirement
D
Simple Detector Alignment: One Coil
Absolute Maximum Ratings:
Supply Voltage, V
11
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V
Volume Control Voltage, V
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4V
Zener Current, I
12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20mA
Transistor Collector Current, I
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
Transistor Base Current, I
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2mA
Bias Resistance (Max), R
13鈥?4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1k鈩?/div>
Operating Temperature Range, T
opr
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?5擄 to +70擄C
Storage Temperature Range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?5擄 to +150擄C
1
2
3
