Bandwidth considerations for a CALLUM transmitter architecture

Author

Strandberg, Roland ; Andreani, Pietro ; Sundstr?¶m, Lars

Author_Institution

Dept. of Electroscience, Lund Univ., Sweden

Volume

4

fYear

2002

fDate

6/24/1905 12:00:00 AM

Abstract

This article presents an investigation of the combined analog locked loop universal modulator (CALLUM) linear transmitter architecture. A simple approximate formula is derived, linking the instantaneous frequency of the CALLUM signals to the modulation depth of the information signal. Furthermore, the effect of the frequency mismatch between the VCOs present in the CALLUM architecture is examined, and the need for frequency synchronization via a phase locked loop is discussed.

Keywords

circuit feedback; modulators; phase locked loops; radio transmitters; synchronisation; voltage-controlled oscillators; CALLUM signal instantaneous frequency; PLL; VCO frequency mismatch effect; combined analog locked loop universal modulator linear transmitter architecture; frequency synchronization; information signal modulation depth; output signal feedback; phase locked loop; transmitter bandwidth considerations; Amplitude modulation; Bandwidth; Channel capacity; Circuit synthesis; Frequency synchronization; Joining processes; Nonlinear distortion; Phase modulation; Radio transmitters; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on

Print_ISBN

0-7803-7448-7

Type

conf

DOI

10.1109/ISCAS.2002.1010379

Filename

1010379