參數(shù)資料
型號: LA70001M
廠商: Sanyo Electric Co.,Ltd.
英文描述: Record/Playback Amplifiers for VHS Format VCRs
中文描述: 記錄/回放放大器適合于VHS格式錄像機(jī)
文件頁數(shù): 7/8頁
文件大?。?/td> 134K
代理商: LA70001M
No. 5709-7/8
LA70001, 70001M
Record Amplifier Gain Control
The LA70001 achieves an adjustment-free record current by adding an AGC circuit in the record amplifier block. The
record current can be modified using the following method.
Record current adjustment 2: When left open.
Pin 12 DC level is set to 1/2 V
CC
(approximately 2.5 V) by an internal bias, and the record current is determined by
Ro1.
Design value: When Ro1 is 1.5 k
, the record current will be 12.7 mA per channel.
Record current adjustment 2: When used.
The gain can be varied by –6.0 dB to +3.5 dB relative to the value set by Ro1 by applying a control DC voltage of
between 1 and 4 V to pin 12.
Note: The technique shown in the figure below can be used to apply a DC level to pin 12. This allows a control voltage of between 1 and 4 V to be applied.
Record current (mAp-p) design value
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