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BA7746FS Fiches technique(PDF) 9 Page - Rohm

No de pièce BA7746FS
Description  VCR Hi-Fi audio signal REC / PB amplifier
PDF  12 Pages
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Fabricant  ROHM [Rohm]
Site Internet  http://www.rohm.com
Logo ROHM - Rohm

BA7746FS Fiches technique(HTML) 9 Page - Rohm

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9
Video ICs
BA7746S / BA7746FS
•Control mode tables
(1) REC / PB control
Switch between REC and PB using pin 12.
REC / PB
H
REC
ON
OFF
ON
OFF
L
PB
OFF
ON
OFF
ON
REC + B SW
REC AMP
PRE AMP
HEAD SW (P)
Mode
Control pin
Function
(2) OVER REC control
Control for OVER REC (current emphasis) is done using pin 9.
When in OVER REC mode, the gain setting is recording
amplifier AGC level + 1.9dB.
H
L—
60.0mAP-P
48.2mAP-P
OVER REC
OVER REC
Mode
Function
REC AGC Level
Control pin
(3) REC MUTE control
Control for REC MUTE when recording is done using pin 8.
REC MUTE
REC AMP
H
REC MUTE
OFF
L—
ON
Mode
Control pin
Function
(4) EP / SP control
EP / SP control during playback is done using pin 4. When
EP is selected, the gain of the playback amplifier is increased
by 5dB over its normal setting.
EP / SP
H
EP
Typ. + 5dB
L
SP
Typ.
Mode
Function
PRE AMP gain
Control pin



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