Title :
Uniform Design of Multi-Peak Bandwidth Enhancement Technique for Multistage Amplifiers
Author :
Samadi, Reza ; Karsilayan, Aydin Ilker
Author_Institution :
Adv. Micro Device Inc., Austin
fDate :
7/1/2007 12:00:00 AM
Abstract :
A new technique for designing uniform multistage amplifiers (MAs) for high-frequency applications is introduced. The proposed method uses the multi-peak bandwidth enhancement technique while it employs identical, simple and inductorless stages. The intrinsic capacitances within transistors are exploited by the active negative feedbacks to expand the bandwidth. While all stages of the proposed MA topology are identical, the gain-bandwidth product can be extended several times. Using the proposed topology, a six-stage amplifier in TSMC 0.35-mum CMOS process was designed. Measurement results show that the gain can be varied between 16 and 44 dB within 0.7-3.2-GHz bandwidth with less than 5.2-nV /radicHz noise. Die area of the amplifier is 175 mum times 300 mum.
Keywords :
CMOS analogue integrated circuits; cascade networks; integrated circuit design; microwave amplifiers; wideband amplifiers; CMOS process; active negative feedbacks; analog integrated circuits; broadband amplifiers; broadband communications; frequency 0.7 GHz to 3.2 GHz; gain-bandwidth product; inductorless stages; intrinsic capacitances; multipeak bandwidth enhancement; multistage amplifiers; six-stage amplifier; size 0.35 mum; size 175 mum; size 300 mum; Bandwidth; Broadband amplifiers; CMOS process; Capacitance; Circuit topology; Frequency; Optical amplifiers; Process design; Pulse amplifiers; Q factor; Amplifiers; analog integrated circuits; broadband amplifiers; broadband communications;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2007.899615
