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參數(shù)資料
| 型號： | LA70011M |
| 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(jī) |
| 文件頁數(shù)： | 9/11頁 |
| 文件大?。?/td> | 134K |
| 代理商： | LA70011M |
Envelope Detector Characteristic: Pin 6
The LA70011 includes a built-in playback signal envelope detector circuit for use in automating tracking adjustment.
REC AMP Gain Control
The LA70011 eliminates recording current adjustment by adding an automatic gain control circuit to the recording
amplifier. It is also possible to change the recording current with the following methods.
REC-CURRENT-ADJ2 Open
The internal bias forces the DC level at pin 12 to 1/2 V
CC
(that is, approximately 2.5 V), and R
O
1 determines the
recording current.
Design values
R
O
1 = 1.5 k
= 16.0 mA (SP) (per channel)
R
O
1 = 1.5 k
=12.7 mA (EP)
REC-CURRENT-ADJ2 Used
Applying a DC control voltage between 1 and 4 V to pin 12 adjusts the figure determined by R
O
1 between –6.0 dB and
+3.5 dB.
No. 5710-9/11
LA70011, 70011M
R
Pin 6 level - detector
DC level (V)
Pin 7 level - playback output level (mVp-p)
Envelope detector voltage characteristic
EP, with 18k
resistor on pin 6
SP, with 18k
resistor on pin 6
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