ka8512 Samsung Semiconductor, Inc., ka8512 Datasheet - Page 3

• Manufacturer Part Number: ka8512
• Description: Compandor
• Manufacturer: Samsung Semiconductor, Inc.

KA8512
PIN DESCRIPTION (Continued)
Pin No
10
11
12
13
14
6
7
8
9
Symbol
CMUTE
AGIC
GND
CPI+
CRC
CPI-
ALC
V
CO
CC
It is compressor mute terminal of a compandor.
Mute block is used to avoid duplication of data transmission from MICOM
(Between the base and hand set) with the voice signal.
It is connected to the TX mute terminal of MICOM.
Compressing is executed if the terminal is high, and compressor mute is
executed if it is low.
It is ground terminal.
It is a MIC AMP non-inverting input terminal of compressor, and is used
as an input terminal for voice signal.
It is a MIC AMP inverting input terminal of compressor, and is used for
adjusting the negative feedback loop gain.
(In application, gain is about 5)
This terminal is used for converting waveform from the full wave rectifier
to DC element at the rectifier block of compressor.
(R X C = 22msec)
This terminal is used for bypassing an AC element at the feed-back loop
which comes from the SUM AMP block of compressor. A capacitor should
be connected between this terminal and GND.
It is a compressor output terminal of compandor, and is connected to the
modulation input terminal of transmitter.
It is a reference voltage input terminal of ALC (Automatic Level Control).
ALC circuit may be turned off according to the ALC reference voltage, ma-
gnitude of output voltage may be limited if it is used for adjusting THD of
output voltage of compressor to less than 3% or to limit the frequency of
TX in case the input is higher than a certain level.
It is supply voltage terminal.
Description
COMPANDOR