TEA7532 ST Microelectronics, Inc., TEA7532 Datasheet - Page 10

• Manufacturer Part Number: TEA7532
• Description: Monitor Amplifier With Anti-larsen Function And Adjustment (full Duplex)
• Manufacturer: ST Microelectronics, Inc.

TEA7532
A complete telephone set has two antilarsen
systems :
Figure 18.
PIN FUNCTIONS
PIN 1 : ADJUST V
This pin is used to adjust the IC supply voltage.
PIN 2 : ANTILARSEN ADJUSTMENT
The AC signal at this pin is amplified to the loud-
speaker without AGC attenuation.
10/16
-
one in the transmission circuit (for example :
TEA7051) antisidetone network ;
LS
Together these form a high efficiency antilarsen
system.
PIN 3 : AUTOMATIC GAIN CONTROL FILTER
The antidistortion system response is adjusted by
the R-C network on this pin.
The AGC will be switched ON when the level on pin
3 is greater than the reference voltage (0.4 V), the RC-
network charges (current source ON) or discharges
(current source OFF) according to the supply voltage.
-
one in the loudspeaker amplifier
(for example : TEA7532).