Title :
A 48 GHz Fully Integrated Differential VCO in InP DHBT Technology
Author :
Withitsoonthorn, S. ; Blayac, S. ; Riet, M. ; Berdaguer, P. ; Gonzalez, C.
Author_Institution :
Alcatel R& I - Laboratoire OPTO+, Route de Nozay, 91460 Marcoussis Cedex, France. Tel: + 33 1 69 63 41 98, Fax: + 33 1 69 63 14 22 E.mail: Suwimol.Withitsoonthorn@alcatel.fr
Abstract :
We describe the development of a 48 GHz fully integrated differential VCO, using InP/ InGaAs double heterojunction bipolar transistors (DHBTs), for 40 Gbit/ s optical communication systems. This VCO is based on a balanced Colpitts-type topology where a coplanar transmission line is used as the inductive resonator element. The oscillation frequency is tuneable by varying the base-collector junction capacitance of DHBTs without using any external varactors. The VCO exhibits 46.4 - 49.5 GHz (6.5%) tuning range over a tuning voltage range of 1 V. The circuit provides a non-corrected single-ended output power between - 10.5 and - 13.5 dBm while the phase noise varies between - 75 and - 80 dBc/ Hz at 1 MHz offset.
Keywords :
Circuit optimization; Circuit topology; Coplanar transmission lines; DH-HEMTs; Double heterojunction bipolar transistors; Indium gallium arsenide; Indium phosphide; Optical fiber communication; Optical resonators; Voltage-controlled oscillators;
Conference_Titel :
Microwave Conference, 2003 33rd European
Conference_Location :
Munich, Germany
Print_ISBN :
1-58053-834-7
DOI :
10.1109/EUMA.2003.341017
