M65845AFP

REJ03F0170-0201 Rev.2.01 Jan 25, 2008

Page 7 of 13

ALC Level Block Diagram

–60

–50

–40

–30

–20

–10

–30

–20

–10

0

10

ALC supply voltage control limits

It is set 47 dB for microphone amplifier gain.

Vo (dBV)

Vi (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 pin 35.

(Setting up forms)

0 V

2.5 V (

1

2

1

2

internal direct bias

half peak

voltage Vpo

–5 dBV = 0.56 Vrms = 1.59 Vp-p = 0.80 Vp-o

are concerned.