Description
This 16 pins IC is designed for monitor (loudspeaker) telephone set and provides : a) Signal amplification for monitoring (loudspeaker) b) Antiacoustic feedback (antilarsen) c) Antidistortion by automatic gain adaptation d) Antilarsen adjustment (full duplex) BLOCK DIAGRAM
DIP16
SO16
ORDERING NUM
Features
- of each exist in different frequency bands. To extract the larsen component, the microphone signal is first filtered by a second order filter (formed Figure 16.
by two first order filters), then amplified and rectified in order to produce the AGC control signal. Zin : 4 kΩ A=
V7
V5.
- V6
= 15
The first filter is generated by the capacitors on pins 5 and 6 ; the second filter by the R-C network on pin 7.
8/16
TEA7532
Figure 17 : Antilarsen System Filter Response. Filter on pins 5 &.
TEA7532 Datasheet
