III. Gm-C Filtering - Epublications - Université de Limoges
III. Gm-C Filtering - Epublications - Université de Limoges
III. Gm-C Filtering - Epublications - Université de Limoges
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Summary<br />
ACKNOWLEDGMENTS .................................................................................................................................. - 1 -<br />
SUMMARY ................................................................................................................................................... - 3 -<br />
FRENCH INTRODUCTION .............................................................................................................................. - 7 -<br />
I. INTRODUCTION TO TV TUNERS AND TO RF FILTERING ........................................................................ - 9 -<br />
I.1 TV SIGNALS TRANSMISSION..........................................................................................................................- 9 -<br />
I.1.a Vi<strong>de</strong>o Signal Transmissions ......................................................................................................... - 9 -<br />
I.1.b Modulation.................................................................................................................................. - 9 -<br />
I.1.c Satellite, Cable & Terrestrial spectra......................................................................................... - 13 -<br />
I.1.d General Description of a TV Receiver ........................................................................................ - 16 -<br />
I.1.e Broadband Reception Systems .................................................................................................. - 17 -<br />
I.2 TV RECEIVERS ARCHITECTURE & SPECIFICATIONS............................................................................................- 18 -<br />
I.2.a TV Tuner Architecture................................................................................................................ - 18 -<br />
I.2.b TV Tuner High Performance Specifications ............................................................................... - 19 -<br />
I.3 RF FILTER SPECIFICATIONS..........................................................................................................................- 23 -<br />
I.3.a TV Tuner Bloc Specifications...................................................................................................... - 23 -<br />
I.3.b Roles of RF Selectivity................................................................................................................ - 25 -<br />
I.3.c Selectivity Specifications............................................................................................................ - 27 -<br />
I.3.d Abacus....................................................................................................................................... - 28 -<br />
I.3.e RF Performances Specifications................................................................................................. - 29 -<br />
I.4 TECHNOLOGICAL TREND OF RF SELECTIVITY ...................................................................................................- 30 -<br />
I.4.a RF filtering integration history .................................................................................................. - 30 -<br />
I.4.b Opportunities & Limitations of active circuits ........................................................................... - 31 -<br />
I.5 ANSWERING THE PROBLEMATIC OF THE PHD THESIS........................................................................................- 32 -<br />
I.6 REFERENCES ............................................................................................................................................- 33 -<br />
II. CHALLENGES OF RF SELECTIVITY ....................................................................................................... - 35 -<br />
II.1 COMPARISON OF THE POSSIBLE TOPOLOGIES.............................................................................................- 35 -<br />
II.1.a Possible Topologies ................................................................................................................... - 35 -<br />
II.1.b Low-pass Topologies ................................................................................................................. - 35 -<br />
II.1.c Bandpass Topologies................................................................................................................. - 40 -<br />
II.1.d Double Notch Topologies .......................................................................................................... - 46 -<br />
II.1.e Comparison of the Topologies................................................................................................... - 48 -<br />
II.2 PASSIVE LC SECOND ORDER BANDPASS FILTERING .....................................................................................- 49 -<br />
II.2.a Frequency Tunability ................................................................................................................. - 49 -<br />
II.2.b Selectivity Tunability.................................................................................................................. - 51 -<br />
II.2.c Second Or<strong>de</strong>r Bandpass Filter for TV Tuners Specifications ...................................................... - 53 -<br />
II.2.d Passive LC Filters from the Literature ........................................................................................ - 54 -<br />
II.3 TOWARDS A FAIR FIGURE-OF-MERIT .......................................................................................................- 56 -<br />
II.3.a Required Parameters to Handle a Fair Comparison .................................................................. - 56 -<br />
II.3.b Study of the Figures-of-Merit Found in the Literature............................................................... - 56 -<br />
II.3.c Proposed Figure-of-Merit .......................................................................................................... - 57 -<br />
II.4 ACTIVE FILTERING SOLUTIONS ................................................................................................................- 58 -<br />
II.4.a Gyrator-C <strong>Filtering</strong>..................................................................................................................... - 58 -<br />
II.4.b <strong>Gm</strong>-C filtering ............................................................................................................................ - 66 -<br />
II.4.c Second Or<strong>de</strong>r Bandpass Filters .................................................................................................. - 69 -<br />
II.4.d Rm-C <strong>Filtering</strong>............................................................................................................................ - 72 -<br />
II.5 LITERATURE SURVEY .............................................................................................................................- 74 -<br />
II.6 TECHNOLOGICAL OPPORTUNITIES AND LIMITATIONS ...................................................................................- 76 -<br />
II.6.a Integrated Passive Components................................................................................................ - 76 -<br />
II.6.b Transistors................................................................................................................................. - 76 -<br />
II.7 CONCLUSION.......................................................................................................................................- 79 -<br />
II.8 REFERENCES........................................................................................................................................- 80 -<br />
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