AN3479 Panasonic Semiconductor, AN3479 Datasheet - Page 7

• Manufacturer Part Number: AN3479
• Description: VCR SignalLuminance/ Chroma and Normal Audio Signals Processing IC
• Manufacturer: Panasonic Semiconductor

ICs for VCR
Pin No.
Pin Descriptions (cont.)
15
15
17
18
19
20
AGCTL
VGCTL
AUDIO
-IN
MUTE
SW
HOLD
MIN
DCFB
PIn name
DC voltage (V
playback,
recording
2.5V for
0.7V for
1.25V
(Rec)
2.2V
2.5V
2.5V
(PB)
and
CC
=5V)
(For playback)
(For
recording)
(For
playback)
(For
recording)
2.8K
2.8K
20
100
100
Equivalent circuit
200
200
150
20k
20k
25k
25k
46K
46K
200
15
10k
15
0.1 F
17
18
0.1 F
19
Peak hold of automatic tracking
interface peak detection integration
signal for the playback mode. An
external capacitor is connected to
this pin for peak hold function.
Connecting to an external capacitor
for recording amplifier DC voltage
feedback at the recording mode
Gain control of automatic tracking
interface amplifiers.Pin17(AGCTL)
controls the gain in the audio mode,
and Pin18 (VGCTL) controls the
gain in the video mode.
Automatic tracking interface audio
FM signal input
Mute control for the recording
mode. Muting is on at low and OFF
at high (open).
Description
AN3389SB
7