PS20230 Datasheet, PDF (4/26 Pages) List of Unclassifed Manufacturers – COFDM demodulator with USB interface for PC-TV

PS20230
Table of Contents
1 System.....................................................................................................................................................1
1.1 Features...........................................................................................................................................1
1.2 Applications .....................................................................................................................................2
2 Pin definitions..........................................................................................................................................7
2.1.1 Pull-Up / Pull-Down Resistors ...................................................................................................8
3 Pin diagram..............................................................................................................................................9
4 Pin list....................................................................................................................................................10
5 Application schematic............................................................................................................................11
6 8051 Microprocessor .............................................................................................................................12
6.1 Internal data memory ....................................................................................................................12
7 Demodulator Functional Description......................................................................................................14
7.1 Analogue-to-Digital Converter........................................................................................................15
7.2 Automatic Gain Control..................................................................................................................15
7.3 IF to Baseband Conversion .............................................................................................................16
7.4 Adjacent Channel Filtering .............................................................................................................16
7.5 Interpolation and Clock Synchronisation ........................................................................................16
7.6 Carrier Frequency Synchronisation.................................................................................................16
7.7 Symbol Timing Synchronisation......................................................................................................16
7.8 Fast Fourier Transform ...................................................................................................................16
7.9 Common Phase Error Correction ....................................................................................................17
7.10 Channel Equalisation......................................................................................................................17
7.11 Impulse Filtering ............................................................................................................................17
7.12 Transmission Parameter Signalling (TPS) ........................................................................................17
7.13 De-Mapper.....................................................................................................................................17
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