On the design of an offset-PLL modulation loop for the EGSM band

Author

Hafez, Amr ; Aboueldahab, Waleed F. ; Helmy, Ahmed

Author_Institution

Dept. of Electron. & Commun., Cairo Univ., Giza, Egypt

Volume

4

fYear

2004

fDate

23-26 May 2004

Abstract

Issues associated with the system design of an offset phase locked modulation loop (OPLL) are presented in this paper. The sources of spurs within the loop are all explained in detail. In order to meet the transmission mask stringent requirements for the EGSM band, a criteria for choosing the IF frequency is presented. Additionally, the paper gives the design procedures for calculating the required suppression of the offset mixer spurious signals by the offset mixer and feed back filter with respect to the IF signal.

Keywords

frequency modulation; low-pass filters; mixers (circuits); phase locked loops; voltage-controlled oscillators; EGSM band; IF signal; feed back filter; offset PLL modulation loop; offset mixer spurious signals; offset phase locked modulation loop design; transmission mask stringent; voltage-controlled oscillators; Feedback; Filtering; Mixers; Phase frequency detector; Phase modulation; Power harmonic filters; Pulse width modulation; Radio frequency; Radio transmitters; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on

Print_ISBN

0-7803-8251-X

Type

conf

DOI

10.1109/ISCAS.2004.1328963

Filename

1328963