JVC RX-807VTN

RX-807VTN
HM M50198P(IC651) : Digital Delay Ic
1. Explanation of the operation
Audio
signal
is
input
to
LPF1
to
reduce
the
high
frequency
components.
The
output
from
LPF1
is
coded
to
1
bit
signal
by
ADM
modulator
and
comparator
with
inside
.This
digital
signal
is
input
to
main
control
logic.
And
this
signal
obtain
various
effect,and
is
written
in
SRAM
.At
the
same
time
main
control
logic
read
the
data
from
SRAM
,and
input
it
to
ADM
demodulator
.The
ADM
demodulator
converts 1bit signal to
analog
signal. The
analog
signal
is
input to
LPF2
to
reduce the
suprius components,and output to Pin 13.
LPF1 Reject the high frequency components which is contained the input signal and unnecessary.
LPF2
Reject
the
suprius
components
which
is
generated
by
the
ADM
demodulation
by
using
with
comparator.
OP1,CC1
For ADM
modulator.
OP2,CC2 For ADM demodulator.
2. Terminal Layout
+B +B
XIN 23] LP IN
X OUT LP OUT
DEL1 21] OP OUT
DEL2 Bo] OPIN
DEL3 [19] REF
cc1
JL-COMIEASY cc2
MUTE [16] OP IN
M.TIME [15] OP OUT
D-GNO LP IN
A-GND LP OUT
4. Block Diagram
1-30 (No. 20333)
3. Pin functions
ro | sym
Ee 3
ea
ss
G
ca
Delay time control Integrator input
1/2 Vec
ris [ow _| :
7 [= _[Comeciedtoond [19 | ner [ave
Pe [20 | evn | riagrator ingot
cs
2 Output of LPF
Input of LPF
Power supply
2
3
2
ig} fig)
PREDICT
CIRCUIT
Hae
iil
ADM MODULATOR
BKbit
mE