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參數(shù)資料
| 型號： | TDA9209 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 3 CHANNEL, VIDEO PREAMPLIFIER, PDIP24 |
| 封裝： | PLASTIC, SHRINK, DIP-24 |
| 文件頁數(shù)： | 19/22頁 |
| 文件大?。?/td> | 1670K |
| 代理商： | TDA9209 |
TDA9209
6/22
4.9 Output Stage
The overall waveforms of the output signal are
shown in Figure 3. The three output stages, which
are large bandwidth output amplifiers, are able to
deliver up to 4.4 VPP for 0.7 VPP on input.
When a high level is applied on the BLK input
(Pin 24), the three outputs are forced to "Infra
Black" level (VDC) thanks to a sample and hold cir-
cuit (described below).
The black level (which is the output voltage out-
side the blanking pulse with minimum brightness
and no Video input signals) is 400 mV higher than
VDC.
The brightness level (VBRT) is then obtained by
programming register 2 (see Table 1 on page 15).
Figure 3. Waveforms VOUT, BRT, CONT, OSD
Notes :
1. VDC
=
0.4 to 2.5V
2. VBLACK
=
VDC + 0.4V
3. VBRT
=
VBLACK + BRT (with BRT = 0 to 2V)
4. VCONT
=
VBRT + CONT = k x Video IN (CONT = 4.4VPP max. for VIN = 0.7VPP)
5. VOSD
=
VBRT + OSD (OSD max. = 4.9VPP , OSD min = 0VPP)
HSYNC
BPCP
BLK
Video IN
FBLK
OSD IN
(4) VCONT
(5) VOSD
(3) VBRT
(2) VBLACK
(1) VDC
Video IN- 1
Video IN - 2
Video OUT- 1
Video OUT- 2
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