- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄371008 > MC13081X (Motorola, Inc.) Multimode Color Monitor Horizontal, Vertical, and Video Combination Processor PDF資料下載
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)： | 18/20頁 |
| 文件大?。?/td> | 235K |
| 代理商： | MC13081X |
MC13081X
18
MOTOROLA ANALOG IC DEVICE DATA
Figure 10. Vertical Section
Vert Ramp Output
1/4 V
Vert Oscillator
Vert Sync Pulse
Free Running V–Ramp
3/4 V
9. Vertical Frequency Range (Pins 48, 51, 52)
The MC13081X vertical oscillator is an injection–lock
type. The device can handle vertical frequency from 45 Hz
to 100 Hz.
The internal ramp generator will generate a ramp output in
the absence of a V–Sync signal. Upon receiving an external
vertical sync pulse, the ramp up portion is forced to retrace,
and therefore, the vertical ramp output is synchronized with
incoming V–Sync.
The slope of the Vertical Ramp output is directly
proportional to the current flowing out of Pin 52. Half of this
current is used to charge up the Vertical Ramp Capacitor. As
the charging current is increased, so does the ramp slope.
External feedback can be provided from Pin 48 to Pins 51
and 52 for linearity adjustment.
10. Vertical Free Running Frequency (Pins 1, 2)
The purpose of the vertical oscillator is to maintain a
vertical ramp to the deflection circuitry in the event the
vertical sync is not present. Because of the injection–lock
type, the free running frequency must be lower than the
system’s lowest vertical frequency.
While various combinations of C4 and R9 can produce a
given frequency, it is recommended C4 be 0.1
μ
F in order to
obtain practical values for R9. The free running frequency
should be set at about 10% lower than the minimum
operating vertical frequency (54 Hz for a 60 Hz system).
R9 is then calculated from:
VCC– 1.4
96 x C4 x FV– 2.5 k
Connecting a potentiometer, (VR2) provides “Vertical
Hold” adjustment.
R9
11. X–Ray Shutdown Protection (Pin 41)
The X–Ray input (Pin 41) permits shutting off the
horizontal drive, usually by external circuitry which monitors
faults within the high voltage supply, such as excess anode
current. This input is activated by taking it above
≈
0.6 V
which causes the drive transistor at Pin 43 to be turned on
(low) permanently by an internal latch.
An external resistor must be connected to Pin 41 to limit
the input current, and to assist with the latching action (see
Figure 11). 10 k
is a typical value, but the value can be
chosen based on the specifies of the driving circuit. The
external resistor reduces the sensitivity of Pin 41 to noise and
transients which may otherwise result in false latches.
To resume normal operation (after correction of the fault),
lower Pin 41 below 0.4 V. If the external circuit’s normal
operation does not take it below 0.4 V, but does take it below
0.6 V, then recycle VCC “off”–“on”. If the pin is not used, it
must be connected to ground.
The minimum holding current to keep the latch on is
≈
70
μ
A, while the minimum turn–on current is
≈
0.4
μ
A.
Figure 11. X–Ray Shutdown Circuit
5.0 V
10 k
H–Drive
Shutdown
47 k
41
X–Ray
Shutdown
相關PDF資料 |
PDF描述 |
|---|---|
| MC1309 | PHASE LOCK LOOP FM STEREO DEMODULATOR |
| MC1309P | PHASE LOCK LOOP FM STEREO DEMODULATOR |
| MC13109A | UNIVERSAL CORDLESS TELEPHONE SUBSYSTEM IC |
| MC13109AFB | UNIVERSAL CORDLESS TELEPHONE SUBSYSTEM IC |
| MC13109AFTA | UNIVERSAL CORDLESS TELEPHONE SUBSYSTEM IC |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MC13081XB | 制造商:Panasonic Industrial Company 功能描述:IC |
| MC1309 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:PHASE LOCK LOOP FM STEREO DEMODULATOR |
| MC1309P | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:PHASE LOCK LOOP FM STEREO DEMODULATOR |
| MC-130A-AC400V | 制造商:Altech Corporation 功能描述: |
| MC130P | 制造商:Panasonic Industrial Company 功能描述:DUST BAG MC-130P |
發(fā)布緊急采購，3分鐘左右您將得到回復。