TEA7532 ST Microelectronics, Inc., TEA7532 Datasheet - Page 8
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TEA7532
Manufacturer Part Number
TEA7532
Description
Monitor Amplifier With Anti-larsen Function And Adjustment (full Duplex)
Manufacturer
ST Microelectronics, Inc.
Datasheet
1.TEA7532.pdf
(16 pages)
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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.