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參數(shù)資料
| 型號(hào)： | TDA4887PS |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 160 MHz bus-controlled monitor video preamplifier |
| 中文描述： | 3 CHANNEL, VIDEO PREAMPLIFIER, PDIP24 |
| 封裝： | 0.400 INCH, PLASTIC, SDIP-24 |
| 文件頁數(shù)： | 37/68頁 |
| 文件大小： | 425K |
| 代理商： | TDA4887PS |
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2001 Oct 19
37
Philips Semiconductors
Product specification
160 MHz bus-controlled monitor video
preamplifier
TDA4887PS
12 TEST AND APPLICATION INFORMATION
handbook, full pagewidth
to cathode
70 V
Application with integrated
post amplifier, AC-coupled cathode
and black level restoration cicuit.
Application with integrated
post amplifier, DC-coupled cathode
and negative feedback.
24
TDA4887PS
I
2
C-BUS
BLACK LEVEL
RESTORATION
1
23
2
22
3
21
4
20
5
19
6
18
7
17
8
16
9
15
10
14
11
13
12
output clamping
blanking
pull-up
resistors
to cathode
subcontrast setting
contrast modulation input
90 V
90 V
Application with discrete
post amplifier, DC-coupled
cathode and negative
feedback.
to cathode
limiting input
input clamping
vertical blanking
OSD
inputs
signal inputs
channel 1
channel 2
channel 3
fast blanking
5 V
8 V
MHB933
Fig.16 Basic applications for different kinds of post amplifiers with DC or AC coupling.
12.1
Test board
For high frequency measurements, a special test board
with only a few external components can be built. It utilizes
the internal positive feedback of the output signals during
output clamping with control bit FPOL = 1. Figure 17
shows the test circuit and Figs 18 and 19 show the layout
and mounting of the double-sided printed-circuit board.
Most components are SMD-type. Short HF loops and
minimum crosstalk between channels and between signal
inputs and outputs are achieved by using properly shaped
ground areas.
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