Title :
A fully integrated 10-Gb/s tapped delay Hilbert transformer for optical single sideband
Author :
Holdenried, Chris D. ; Haslett, James W. ; Davies, Bob
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Calgary, Alta., Canada
fDate :
5/1/2005 12:00:00 AM
Abstract :
A 10-Gb/s SiGe HBT tapped delay Hilbert transformer (HT) integrated circuit (IC) is described. The four tap filter uses an integrated LC transmission line with a total delay of 180ps, and the HT has a nominal group delay of 120ps. The circuit is fabricated in a 47-GHz fT SiGe HBT process and consumes 112mW from a -3.3-V supply. Measured s-parameters and time domain waveforms are shown to agree with theory. Measurements of a 10-Gb/s optical single sideband system indicate that 7dB of broadband sideband suppression is obtainable using the IC.
Keywords :
Ge-Si alloys; Hilbert transforms; S-parameters; bipolar digital integrated circuits; delay filters; electro-optical filters; electro-optical modulation; heterojunction bipolar transistors; optical transfer function; optical transmitters; -3.3 V; 10 Gbit/s; 112 mW; 120 ps; 180 ps; 47 GHz; Hilbert transformer integrated circuit; SiGe; SiGe HBT; broadband sideband suppression; integrated LC transmission line; optical single sideband; s-parameters; tapped delay filter; time domain waveforms; Delay; Distributed parameter circuits; Germanium silicon alloys; Heterojunction bipolar transistors; Integrated optics; Optical filters; Silicon germanium; Time measurement; Transmission line measurements; Transmission line theory; Hilbert transformer (HT); optical single sideband (OSSB); tapped delay filter;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2005.847658
