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TDA4445B Datasheet(PDF) 2 Page - STMicroelectronics

Part # TDA4445B
Description  SOUND IF AMPLIFIER
PDF  6 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA4445B Datasheet(HTML) 2 Page - STMicroelectronics

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BLOCK DIAGRAMS
GENERAL DESCRIPTION
This circuit includes the following functions :
.
Three symmetrical and gain controlled wide
band amplifier stages, which are extremely sta-
ble by quasi DC coupling without feedback.
.
Averaging AGC with discharge control circuit
.
AGC voltage generator
Quasi parallel sound operation :
.
High phase accuracy of the carrier signal proc-
essing, independent from AM
.
Linear quadrature demodulator
.
Sound-IF-amplifier stage with impedance con-
verter
AM-Demodulation (only TDA4445B) :
.
Carrier controlled demodulator
.
Audio frequency stage with impedance con-
verter
.
Averaging low pass AGC
TDA4445A
TDA4445B
TDA4445A - TDA4445B
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