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參數(shù)資料
| 型號(hào)： | SAA1101 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Universal sync generator USG |
| 中文描述： | 通用同步發(fā)電機(jī)副秘書長(zhǎng) |
| 文件頁(yè)數(shù)： | 4/18頁(yè) |
| 文件大?。?/td> | 112K |
| 代理商： | SAA1101 |
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January 1990
12
Philips Semiconductors
Product specication
Universal sync generator (USG)
SAA1101
WAVEFORM TIMING
The waveform timing depends on the frequency of the oscillator input (fOSCI). This is illustrated in the table below as the
number (N) of oscillations at OSCI. The timings are derived from N
× t
OSCI ± 100 ns.
One horizontal scan (H) = 320
× t
OSCI =1/fH.
Where tOSCI = 200 ns for PAL/SECAM and 198.6 ns for NTSC/PAL-M
SYMBOL
PARAMETER
PAL
NTSC
PAL-M
SECAM
UNIT
N
Composite sync (CS)
tWSC1
horizontal sync pulse
width
4.8
4.77
4.8
s24
tWSC2
equalizing pulse width 2.4
2.38
2.4
s12
tWSC3
serration pulse width
4.8
4.77
4.8
s24
duration of
pre-equalizing pulses
2.5
3
2.5
H
duration of
post-equalizing
pulses
2.5
3
2.5
H
duration of serration
pulses
2.5
3
3.5
2.5
H
Composite blanking (CB)
HORIZONTAL BLANKING PULSE WIDTH
tWCB
PAL/SECAM/PAL-M
12
11.12
12
s60
tWCB
NTSC1
11.12
s56
tWCB
NTSC2
10.53 (note1)
s53
FRONT PORCH
tPCBCS
front porch
1.6
1.59
1.6
s8
DURATION OF VERTICAL BLANKING
PAL/SECAM/PAL-M
25H
+ t
WCB
21H
+ t
WCB
25H
+ t
WCB
NTSC1
21H
+ t
WCB
NTSC2
19H
+ tWCB
Burst key (BK) (not SECAM)
tWBK
burst key pulse width
2.4
2.38
s12
tPCSBK
CS to burst key delay
5.6
5.56
5.76
s28
burst suppression
9
11
H
POSITION OF BURST SUPPRESSION
rst half picture
H623 to H6
H523 to H6
H523 to H8
second half picture
H310 to H318
H261 to H269
H260 to H270
third half picture
H622 to H5
H523 to H6
H522 to H7
fourth half picture
H311 to H319
H261 to H269
H259 to H269
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