DocumentCode :
597065
Title :
Compact class-AB follower for wideband closed loop line drivers
Author :
Gascon, David ; Sanuy, A. ; Sieiro, Javier
Author_Institution :
ECM Dept., Univ. of Barcelona, Barcelona, Spain
fYear :
2012
fDate :
9-12 Dec. 2012
Firstpage :
101
Lastpage :
104
Abstract :
A wideband and compact class-AB follower is presented. A fast local feedback loop provides class-AB operation and decreases the output impedance even at high frequency, thus providing line driving capability. Both CMOS and BiCMOS versions in a 0.35 μm BiCMOS technology are discussed. The proposed follower bandwidth exceeds 1 GHz, with relatively low power consumption and it is suitable as output stage of closed loop amplifiers. The BiCMOS follower version has been integrated in a fully differential operational amplifier. According to simulations line driver THD is smaller than -70 dB when the input is a 0.5 Vpp sinusoid at frequencies below 10 MHz; and smaller than -50 dB THD at 100 MHz. Measurement results of a transimpedance amplifier (TIA) including the operational amplifier are presented as well.
Keywords :
BiCMOS analogue integrated circuits; driver circuits; feedback; harmonic distortion; operational amplifiers; power consumption; wideband amplifiers; BiCMOS follower version; BiCMOS technology; THD; TIA; closed loop amplifiers; compact class-AB follower; fast local feedback loop; frequency 100 MHz; full differential operational amplifier; high frequency; power consumption; size 0.35 mum; transimpedance amplifier; voltage 0.5 V; wideband closed loop line drivers; BiCMOS integrated circuits; CMOS integrated circuits; Feedback loop; Gain; Impedance; Resistors; Wideband;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electronics, Circuits and Systems (ICECS), 2012 19th IEEE International Conference on
Conference_Location :
Seville
Print_ISBN :
978-1-4673-1261-5
Electronic_ISBN :
978-1-4673-1259-2
Type :
conf
DOI :
10.1109/ICECS.2012.6463789
Filename :
6463789
Link To Document :
بازگشت