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TDA4480-D

Part Number	TDA4480-D
Manufacturer	TEMIC Semiconductors
Description	Multi Standard Quasi Parallel-Sound Processor
Published	Jul 31, 2014
Detailed Description	TELEFUNKEN Semiconductors TDA4480-D Multi Standard Quasi Parallel-Sound Processor for TV-Sets Technology: Bipolar Feat...
Datasheet	TDA4480-D PDF File

Overview

TELEFUNKEN Semiconductors TDA4480-D Multi Standard Quasi Parallel-Sound Processor for TV-Sets Technology: Bipolar Features D High signal sensitivity D Simple filter configuration and few external components D VCO controlled mixer stage converts intercarrier frequencies of different standards into a preferred sound IF D D D D Processing of two carrier stereo signals Low intercarrier distortions AF output level matched to SIMAVELEC condition Alignment free AM demodulator for the standard L D Optimum tuning characteristic D ESD protected Case: DIP20 Figure 1.
Block diagram Rev.
A1: 14.
09.
1995 1 (8) TDA4480-D Pin Description Pin 1–2 3 4 5 6 7 8-9 10 Symbol Function Vision-IF-carrier input Intercarrier input 5.
74 MHz AGC time constant Intercarrier output 5.
74 MHz Standard switch AF output 1 Phase tank circuit 5.
74 MHz VC0 tank circuit Pin 11 12-13 14 15 16 17 18-19 20 TELEFUNKEN Semiconductors Symbol Function Ground Phase tank circuit 5.
5 MHz AF output 2 Intercarrier output 5.
5 MHz Supply voltage Intercarrier input 5.
5 MHz Sound-IF-carrier input NC Circuit Description The integrated circuit allows the high quality processing of sound carrier for different TV standards.
The circuit requires separate vision and audio carrier inputs.
It delivers the output audio signal for mono, two channels or stereo applications.
Audio carrier signal (simple or double carrier, FM and AM) is applied via three stage AGC controlled broad band amplifier which delivers regulated output signal for two mixing stages.
One mixer works for AM-demodulation and AGC-function whereas the second mixer produces the sound intercarrier IF-frequencies (5.
5/5.
74 MHz).
Vision carrier signal for the intercarrier generation is delivered from the demodulator tank of the video IF circuit (TDA 4439, TDA 4453).
It is then matched via a limiter stage to the FM intercarrier mixer.
FM-sound-IF-carrier reaches the quadrature demodulator via the selection circuit and the following limiter amplifier.
The fi...

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