ICs for VCR
AN3275SB
■ Application Circuit Example
• System example
AN3275SB
Video
VCR microcontroller
Video
black detection
To CLT head
CA processor
ROM, RAM
A/D
CLR pulse
Microcontroller
To survo/timer
To front panel
Low sound
detection
Sound
Serial bus
• IC application circuit example
MA
CA
Counter
Clamp
Black video
detect
Video 1
Latch 2
Amp.
Clamp
LPF
BP
Sync.
V-sync.
sepa.
MM3
H-DL
MM1
V-DL
sepa.
E/V mask
E/V mask
V mask
MM4
H mask
H mask
MM2
H-WD
V-WID
LPF3
Audio 1
Latch 2
V mask
Non-audio
detect
Amp. 2
CA
ENV mask
MA
Mix.
Counter
ENV detector
MA
CA
E/V mask
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