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| 型號(hào)： | NTE1785 |
| 廠商： | NTE Electronics, Inc. |
| 英文描述： | Quad Differential Comparator 14-SOIC 0 to 70 |
| 中文描述： | 集成電路電視中頻放大器瓦特/解調(diào)和亞足聯(lián)（對(duì)于進(jìn)步黨調(diào)諧器） |
| 文件頁(yè)數(shù)： | 1/3頁(yè) |
| 文件大小： | 25K |
| 代理商： | NTE1785 |
NTE1785
Integrated Circuit
TV IF Amp
w
/Demod and AFC
(For PNP Tuners)
Description:
The NTE1785 is an IF amplifier and demodulator circuit in a 16–Lead DIP type package designed for
use in color and black and white television receivers using PNP tuners.
Features:
Gain–Controlled Wide–Band Amplifier Providing Complete IF Gain
Synchronous Demodulator
White Spot Inverter
Video Preamplifier with Noise Protection
AFC Circuit which can be Switched ON/OFF by a DC Level (e.g. During Tuning)
AGC Circuit with Noise Gating
Tuner AGC Output (PNP Tuners)
VCR Switch which Switches Off the Video Output (e.g. For Insertion of a VCR Playback Signal)
Absolute Maximum Ratings:
Supply Voltage, V
11–13
Tuner AGC Voltage, V
4–13
Total Power Dissipation, P
tot
Operating Ambient Temperature Range, T
A
Storage Temperature Range, T
stg
13.2V
12V
900mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–25
°
to +60
°
C
–55
°
to +125
°
C
Electrical Characteristics:
(T
A
= +25
°
C, V
11–13
= 12V, f = 38.9MHz unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Supply Voltage Range
V
11–13
V
1–16(rms)
|Z
1–16
|
V
12–13
V
12–13
G
V
B
10.2
12.0
13.2
V
μ
V
k
V
IF Input Voltage for Onset of AGC (RMS Value)
–
100
150
Differential Input Impedance
In parallel with 2pF
–
2
–
Zero–Signal Output Level
Note 1
–
6
±
0.3
3.07
–
Top Sync Output Level
2.9
3.2
V
IF Voltage Gain Control Range
–
64
–
dB
Bandwidth of Video Amplifier
3dB
–
6
–
MHz
Note 1. So–called “Projected Zero Point”, e.g. with switched demodulator.
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