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TDA4480-C

TEMIC Semiconductors
Part Number TDA4480-C
Manufacturer TEMIC Semiconductors
Description Multi standard quasi parallel-sound processor for TV-sets
Published Apr 23, 2005
Detailed Description TELEFUNKEN Semiconductors TDA 4480-C Multi standard quasi parallel-sound processor for TV-sets Technology: Bipolar Fea...
Datasheet PDF File TDA4480-C PDF File

TDA4480-C
TDA4480-C


Overview
TELEFUNKEN Semiconductors TDA 4480-C Multi standard quasi parallel-sound processor for TV-sets Technology: Bipolar Features D High signal sensitivity D Simple filter components configuration and few external D ESD protected D Alignment free AM demodulator for the standard L D VCO controlled mixer stage converts intercarrier frequencies of different standards into a preferred sound IF D Optimum tuning characteristic D Processing of two carrier stereo signals D Low intercarrier distortions Case: 20-pin dual inline plastic Figure 1 Block diagram Preliminary Information 1 TDA 4480-C Pin Configuration 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 Symbol TELEFUNKEN Semiconductors 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 n.
c.
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 final audio signal is supplie...


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