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BA7746S Datasheet(Fiches technique) 6 Page - Rohm

Numéro de pièce BA7746S
Description  VCR Hi-Fi audio signal REC / PB amplifier
Télécharger  12 Pages
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Fabricant  ROHM [Rohm]
Site Internet  http://www.rohm.com
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 6 page
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6
Video ICs
BA7746S / BA7746FS
19
GND
20
REC: 0V
PB: 0.7V
21
REC: 0V
PB: 0.8V
22
23
REC: 4.1V
PB: 0V
24
REC: 4.1V
PB: 0V
Pin No.
Pin name, function and remarks
Voltage
Circuit diagram
〈PRE GND〉
GND for the HEAD AMP.
Use this terminal for the pin 17 to pin 21 GND
connections to improve the noise characteristics.
Connect this pin to the main GND (pin 16).
〈PRE IN ch2〉
Inputl for the playback amplifier (ch2).
The low-frequency cutoff characteristics can be
adjusted with the value of the input coupling
capacitor.
The frequency characteristics can be adjusted so
that it is flat with the L value of the rotary
transformer, and the external capacitor C (100pF
etc.).
〈PRE AC-FB ch2〉
AC feedback for the playback amplifier (ch2).
The high-frequency characteristics of the playback
amplifier can be adjusted with the R value.
〈N.C.〉
Unused.
Connect to
〈MAIN GND〉 to improve the
interchannel matching.
〈REC + B ch2〉
REC + B (ch2).
Open emitter output circuit.
Turns on and off in accordance with the REC / PB
control signal.
〈REC + B ch1〉
REC + B (ch1).
Open emitter output circuit.
Turns on and off in accordance with the REC / PB
control signal.
The values given above are design values, they are not ratings and are not guaranteed.
4k
13k
21
20




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