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參數(shù)資料
| 型號： | LA70020M |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Recording/Playback Amplifier for VHS VCRs |
| 中文描述： | 錄音/放音放大器適合于VHS錄像機 |
| 文件頁數(shù)： | 10/13頁 |
| 文件大小： | 173K |
| 代理商： | LA70020M |
Switching Video Trick Mode with Pin 7
GND < pin 7 level - DC < 1.0 V: TRICK2
1.0 V < pin 7 level - DC < 3.0 V: NORMAL
3.0 V < pin 7 level - DC < 5.0 V: TRICK2
NORMAL Mode
Two channels selected with pin 9 (EP/SP): ON
Envelope comparator: OFF
TRICK Modes
All four channels: ON
Envelope comparator: OFF
Difference between TRICK1 and TRICK2 modes
TRICK1 is a special playback mode using the following path
Envelope comparator OUT (pin 8)
→
Servo (microcontroller)
→
Pin 3 (HA)
→
HA-SW
TRICK2 provides SP searching
Envelope comparator OUT
→
HA-SW
HA-SW (EP/SP mode switch): Pin 9
GND < pin 9 level - DC < 1.5 V: SP mode
1.5 V < pin 9 level - DC < 5 V: EP mode
Video Synchronization of HA Switching Timing during Playback with H-SYNC Signal
During playback, the LA70020’s video circuits synchronize the HA-SW switching timing shown in the following figure
with the H-SYNC signal from pin 11. (Other EP/SP switching takes place in real time.)
The hi-fi playback amplifier’s gain is approximately 2.4 dB higher in EP mode than in SP mode.
SP: 75.0 dB
EP: 77.4 dB
No. 5711-10/13
LA70020, 70020M
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