Requirements for Time-to-Digital Converters in the context of digital-PLL based Frequency Synthesis and GSM Modulation

Author

Vollenbruch, Ulrich ; Liu, Yue ; Bauernfeind, Thomas ; Pittorino, Tindaro ; Neubauer, Volker ; Mayer, Thomas ; Maurer, Linus

Author_Institution

Linz Center of Mechatronics GmbH

fYear

2006

fDate

11-16 June 2006

Firstpage

1817

Lastpage

1820

Abstract

A key issue in proceeding the digitization of phase-locked loops (PLLs) is the realization of proper phase detectors in the digital domain. This paper presents simulative analysis of the properties and requirements for time-to-digital converters (TDCs) used for phase comparison in digitized fractional-N modulators with two-point modulation. Effects due to quantization of the TDC on frequency synthesis as well as GSM modulation quality are considered, defining the realization requirements for a transmitter

Keywords

digital phase locked loops; modulation; phase detectors; quantisation (signal); GSM modulation; fractional-N modulators; frequency synthesis; modulation quality; phase comparison; phase detectors; phase-locked loops; time-to-digital converters; two-point modulation; Analytical models; Detectors; Digital modulation; Digital-to-frequency converters; Frequency conversion; Frequency synthesizers; GSM; Phase detection; Phase locked loops; Phase modulation; Frequency synthesizers; GSM; Time-to-Digital Converter; digital PLL; phase detector; phase locked loops; Â¿Â¿-modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2006. IEEE MTT-S International

Conference_Location

San Francisco, CA

ISSN

0149-645X

Print_ISBN

0-7803-9541-7

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2006.249748

Filename

4015308