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TDA4445 View Datasheet(PDF) - STMicroelectronics

Part Name
Description
MFG CO.
TDA4445
ST-Microelectronics
STMicroelectronics ST-Microelectronics
'TDA4445' PDF : 6 Pages View PDF
1 2 3 4 5 6
TDA4445A - TDA4445B
BLOCK DIAGRAMS
TDA4445A
TDA4445B
.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-
2/6
.. essing, independentfrom 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
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