JVC AX-V4BK - LA2785 (IC601) Surround Signal Processor; LA2785 Terminal Layout; LA2785 Pin Functions

AX-V4BK
M@ 1A2785 (1C601) : Dolby Pro Logic Surround Signal Processor
1. Terminal Layout
2. Pin Functions
Capacitor for spectrum filter in noise
sequencer
Capacitor for spectrum filter in noise
sequencer
Symbol | 1/0 Functions
Capacitor for time constant
22
(in log differential area)
VcSs-1
Capacitor for time constant
23
{in log differential area)
2 NS-BPF2 VCS-2
Capacitor for time constant
24
(in log differential area)
3 VREF Analog reference voltage VCS-TH
$-DC-OU Capacitor for DC-cut Sch L+R RECT Capacitor for Center channel detection
C-DC-OU 26 | DC-CUT
Capacitor for DC-cut Cch Capacitor for DC-cut at detection circuit
L-DC-OU Capacitor for Surround channel detection
4
Capacitor for DC-cut Lch 27 |L-RRECT
Ww Ww Ww N =
7 }|R-DC-OU Capacitor for DC-cut at detection circuit
4
Capacitor for DC-cut Rch 28 | DC-CUT
R-BPF1
a
ight channel signal input LPF,HPF for Right channel control circuit
VREF-
BUFFER VREF low impedance 29 | R-BPF3 LPF,HPF for Right channel control circuit
L-IN
Left
channel
signal
input
30
|
R-BPF2
LPF,HPF
for
Right
channel
control
circuit
C-TRIM
DC-CUT Capacitor for DC-cut Center channel
1
=
Ground
C-MODE-
CAP
Capacitor for Center channel output low-
12 %
pass filter
L-BPF1 LPF,HPF for Lch control circuit
w
w
4
9 fe) Cc 4
e oO Cc
4
—
w
L-BPF LPF,HPF Left channel control circuit Center signal output
35
=
—
> Oo
L-BPF LPF,HPF Left channel control circuit urround signal output
Ww
rn
ie} Cc 4
DC-CU
o)
2
= NS i
Capacitor for DC-cut at detection circuit ight channel signal output
R
RECT
Capacitor
for
Right
channel
detection
L-OUT
Left
channel
signal
output
DC-CUT
Capacitor
for
DC-cut
at
detection
circuit
Vcc
|
|
power
supply
.
:
Oscillation
for
nois
nd
auto
|
L
RECT
|
Capacitor
for
Left
channel
detection
OSC
|
wan
I
agree
balance
Capacitor
for
time
constant
VLR-TH
/STB
Strobe
signal
in
2
|
wane
|
M0
log
ditterential
area)
of
ee
|i
y
ile
ee
Capacitor
for
time
constant
20
VLR-2
:
?
.
.
DATA
Serial
interface
data
input
(in
log
differential
area)
Capacitor
for
time
constant
rae
VER-I
Eg
(in
log
differential
area)
CLK
ie
Serial
interface
clock