ELECTRIC

MITSUBISHI

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M65853FP

MITSUBISHI SOUND PROCESSOR ICs

KARAOKE

DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT

some

parametric

limits

are

subject

to change.

PR

ELI

MIN

AR

Y

Notice

; This

is not

a final

specification.

To set ALC operating voltage at -5dB(Vcc=5V)

-5dBV=0.56Vrms=1.59Vp-p=0.8Vp-o

Since the input impedance at pin 35 is high at 1M

or more,

it is possible to provide ALC operating voltage by dividing

resistance.

ALC operating voltage can be set at a desired value between -10 and +3dBV by varying

the DC voltage applied to pin 35 (ALC operating voltage setting terminal).

(Setting method)

(6)ALC operating voltage setting

ONE SIDE

PEAK VOLTAGE,Vpo

VOLTAGE APPLIED TO 35 PIN,VALC

OV

VALC=

Vcc-Vpo

2

1

2.5V(

Vcc)

INTERNAL DC BIAS

2

1

35

R

Vcc

51k

0.01

µ

When Vcc=5V

Voltage applied to

pin 35 VALC(V)

ALC operating

voltage (dBV)

Resistance R(

)

+3

0

-2

-4

-6

-8

-10

0.50

1.09

1.38

1.61

1.79

1.94

2.05

5.6k

15k

20k

24k

27k

33k

36k

(5)ALC level diagram

-30

-20

-10

0

+3

10

-50 -40 -30 -20 -10

MICROPHONE AMPLIFIER GAIN SETTIG=47dB

ALC OPERATING VOLTAGE SETTING RANGE

Vo(dBV)

Vi(dBV)

-60

-70

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