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參數(shù)資料
| 型號： | MC13081X |
| 廠商： | Motorola, Inc. |
| 英文描述： | Multimode Color Monitor Horizontal, Vertical, and Video Combination Processor |
| 中文描述： | 多模彩色顯示器水平，垂直和視頻處理器組合 |
| 文件頁數(shù)： | 10/20頁 |
| 文件大小： | 235K |
| 代理商： | MC13081X |
MC13081X
10
MOTOROLA ANALOG IC DEVICE DATA
PIN FUNCTION DESCRIPTION (continued)
Pin
Description
Equivalent Internal Circuit
Name
48
Vertical Ramp
Output
VCC
48
10 k
To Vertical
Deflection
Circuit
2.0 V, 5.0 V
Trip Pts
Vertical
Oscillator
Vertical
Ramp Generator
This ramp signal drives the external vertical output
devices.
Voltage ramps from 2.0 V to less than 5.0 V,
depending on frequency and components at Pins 51
and 52.
Loading on this pin must be > 30 k
to avoid
distorting or clipping the ramp.
49, 50
N/C
These two pins are internally connected to each other,
and nothing else.
51
Vertical Ramp
Capacitor
I
VCC
1.0 k
5.7
200
Ramp Output
Buffer
Switching
Control
Vertical
Oscillator
I
2
The slope of the output ramp is determined by the
components at Pins 51 and 52.
The resistor at Pin 52 sets the charging current of the
capacitor, and therfore the vertical height of the
picture.
The linearity of the ramp can be modified by external
feedback.
52
Vertical Size
Control
52
51
C51
53
Vertical Sync
Polarity
Detector
5.0 V
53 54
53, 54
The output goes low when the vertical sync input
polarity is positive. It goes high when the vertical sync
input polarity is negative.
54
Horizontal
Sync Polarity
Detector
The output goes low when the horizontal sync input
polarity is positive. It goes high when the horizontal
sync input polarity is negative.
55
Horizontal
Position
Control
55
5.0 V
Ramp 1
25 k
15 k
10 k
5.0 V
R55
Varying the voltage at this pin will change the
horizontal position of the picture.
Input impedance is
≈
31 k
.
56
Timebase
VCC2
Connected to a 8.0 V,
±
5%, dc supply. Decoupling is
required at this pin.
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