Title :
Feedback network for cascaded ultra-wideband amplifiers
Author :
Tiiliharju, Esa ; Koivisto, Tero
Author_Institution :
Dept. of Inf. Technol., Univ. of Turku, Turku
Abstract :
This paper relates to a feedback network for cascade amplifiers, which uses an active stage to feed signal back to a first internal node at the output of the first amplifier stage of the cascade, and an optional feedback path through a resistor. The proposed simple connection is shown to improve amplifier stability and to increase isolation, with no discernible extra cost. First measurement results of an UWB LNA prototype circuit fabricated in a 130-nm digital CMOS process will be given to support stated benefits.
Keywords :
CMOS integrated circuits; cascade networks; feedback amplifiers; ultra wideband technology; UWB LNA prototype circuit; amplifier stability; cascade amplifiers; cascaded ultrawideband amplifiers; digital CMOS process; feedback network; size 130 nm; CMOS process; Circuit stability; Costs; Feedback circuits; Low-noise amplifiers; Network topology; Optical amplifiers; Output feedback; Resistors; Ultra wideband technology; LNA; UWB; digital CMOS; feedback network;
Conference_Titel :
Ultra-Wideband, 2008. ICUWB 2008. IEEE International Conference on
Conference_Location :
Hannover
Print_ISBN :
978-1-4244-2216-6
Electronic_ISBN :
978-1-4244-1827-5
DOI :
10.1109/ICUWB.2008.4653276
