s
P R
ti
E
; Thais ietric limit
ce
m
No e par
som
p
t
M I
n
N
t a finaalrs subjec
LI
o s e
.
Y
ecificatitoonchange.
AR
MITSUBISHI SOUND PROCESSOR ICs
M65845AFP
DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT
(2) ALC level block diagram
v
o(dBV)
10
ALC supply voltage control limits
+3
0
-10
-20
It is set 47dB for microphone amplifier gain.
-30
-60
-50
-40
-30
-20
-10
v
i(dBV)
(3) ALC operation voltage control
ALC operation voltage can be formed within the limits of -10 to +3 dBV controlled
by DC control voltage which connect 35 pin.
(Setting up forms)
2.5V(
1
Vcc)
2
internal direct bias
half peak
voltage V
po
35 pin control voltage V
ALC
0V
When ALC operation voltage is -5dBV
(at Vcc=5V)
-5dBV=0.56V
rms
=1.59V
p-p
=0.80V
p-o
V
ALC
=2.5-0.8=1.7V
are concerned.
MITSUBISHI
ELECTRIC
V
ALC
=
1
V
cc
-V
po
2
( 8 / 15 )
MITSUBISHI [ MITSUBISHI ELECTRIC SEMICONDUCTOR ]
