Title :
A variable gain amplifier with fast feedforward DC-offset compensation for 10Gb/s burst-mode receiver applications
Author :
Jain, Abhishek ; Ossieur, P. ; Townsend, Paul D.
Author_Institution :
Photonic Syst. Group, Univ. Coll. Cork, Cork, Ireland
Abstract :
We present a variable gain amplifier with novel fast feedforward dc-offset compensation intended for use in an optical linear burst-mode receiver. The amplifier was implemented in a 0.25μm SiGe BiCMOS technology. Its gain can be varied from 0dB till 20dB while maintaining a bandwidth of at least 12GHz, peaking of the frequency response is less than 0.5dB and group delay variation less than 5ps (from 1MHz to 15GHz). Its input-referred dc-offset is less than 15mV after dc-offset compensation (3-sigma).
Keywords :
BiCMOS integrated circuits; Ge-Si alloys; amplifiers; optical receivers; SiGe; SiGe BiCMOS technology; bit rate 10 Gbit/s; feedforward DC-offset compensation; frequency 1 MHz to 15 GHz; frequency response; group delay variation; optical linear burst-mode receiver; size 0.25 micron; variable gain amplifier; fast dc-offset compensation; optical access networks; optical receiver; variable gain amplifier;
Conference_Titel :
Signals and Systems Conference (ISSC 2012), IET Irish
Conference_Location :
Maynooth
Electronic_ISBN :
978-1-84919-613-0
DOI :
10.1049/ic.2012.0208
