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參數(shù)資料
| 型號： | M52347 |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SYNC SIGNAL PROCESSOR |
| 中文描述： | 同步信號處理器 |
| 文件頁數(shù)： | 10/13頁 |
| 文件大?。?/td> | 131K |
| 代理商： | M52347 |
MITSUBISHI ICs (Monitor)
M52347SP/FP
SYNC SIGNAL PROCESSOR
10
APPLICATION METHOD
1. Input block
1) GREEN (SYNC ON VIDEO) IN (Pin
Input with sync negative polarity.
)
Comparison of pin
the inside of the IC performs the synchronous separation. When
input signal and the reference voltage of
the input at pin
(2.8V) and the flowing current is more than or equal to the input
sensitivity current (200
μ
A or more), the signal is separated.
is less than or equal to the reference voltage
When only a synchronous signal is input into pin
operatable amplitude and the duty are as shown in Figure 1.
If the IC does not operate normally with the video signal input,
change the value of external resistance R to make the current
optimum.
But, when capacity value is too big, output response
becomes bad.
, the
2) COMP/H IN, VIN (pins
and
)
The composite sync input is connected to pin
. H and V of the
separate sync input are connected to pins
and
,
respectively. For each of pins
impedance is 10 k
. The internal double threshold converter is
used for shaping waveform and for detecting polarity.
Average DC voltage of input signal is 2.5V. Each threshold
voltage is set at a voltage
±
0.3V away from this voltage.
and
, the bias is 2.5V and the
If the duty ratio at pin
optimum value is approx. 0.3 V
P-P
. If the duty ratio is large, the
optimum value is approx. 0.6 V
P-P
. Figure 3 shows the allowable
input amplitude and the reference value of duty test.
Only 5V TTL input, decrease the amplitude by resistor
splitting.
In addition, Figure 4 shows an example for improving the
capability of the allowable duty when the input amplitude is 0.7
V
P-P
or more.
To use the IC out of the standard value, remove the filter from
is small as shown in Figure 2, the
pins
with the waveform shown in Figure 5.
and
, observe the waveform and check for a match
Fig. 2
Fig. 4
Fig. 1
Fig. 3
Fig. 5
3
4
4
4
6
8
6
6
8
6
8
6
7
9
2.8V
2.5V
2.2V
Small POSI Duty
Lsrge NEG Duty
100
18k
3k
Input signal
: 5V
6
8
pin
or pin
This additional circuit (limiter) limits
the amplitude to 0.6 V
P-P
.
0
0.2
0.4
0.6
1.0
10
15
20
30
0.8
25
0
R=56k
R=75k
5
f=100kHz
4
3.3
μ
R
O
Input Amplitude (V
P-P
)
0
0.5
1
1.5
2.5
10
20
30
50
2
40
0
O
Input Amplitude (V
P-P
)
2.5V
4.5V
2.5V
0.5V
POSI input
NEG input
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M52347FP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SYNC SIGNAL PROCESSOR |
| M52347SP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Sync Signal Processor |
| M52348FP | 制造商:Panasonic Industrial Company 功能描述:IC |
| M52348SP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:WIDE FREQUENCY BAND ANALOG SWITCH |
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