TEA7532 ST Microelectronics, Inc., TEA7532 Datasheet - Page 8

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

To extract the larsen component, the microphone
signal is first filtered by a second order filter (formed
Figure 16.
The first filter is generated by the capacitors on pins 5 and 6 ; the second filter by the R-C network on pin 7.
TEA7532
Principle of operation.
When examining the spectral density of the voice
area and the larsen area, it can be seen that the
Figure 15.
8/16
Zin : 4 k
A =
V5 – V6
V7
= 15
dominant features of each exist in different fre-
quency bands.
by two first order filters), then amplified and rectified
in order to produce the AGC control signal.