A 10MHz to 100MHz bandwidth scalable, fully differential current feedback amplifier

Author

Bajaj, Nihit ; Vermeire, Bert ; Bakkaloglu, Bertan

Author_Institution

Sch. of Electr., Comput. & Energy Eng., Arizona State Univ., Tempe, AZ, USA

fYear

2010

fDate

May 30 2010-June 2 2010

Firstpage

217

Lastpage

220

Abstract

A technique for power-bandwidth scaling of a current feedback amplifier (CFA) is presented. By employing current gain, instead of the feedback resistance, to alter the closed-loop bandwidth of the CFA, the proposed approach is shown to provide 30% quiescent power savings for a bandwidth variation of 10MHz to 100MHz. Parasitic extracted simulations are performed in a 0.18μm CMOS process with a power supply of 3.3V and a load capacitance of 1.5pF. A closed-loop gain range of 0-20dB, slew rate of 200V/μs, settling time of 33ns and total harmonic distortion of 73dB is achieved at a quiescent power consumption range of 3mW to 4.4mW.

Keywords

CMOS analogue integrated circuits; capacitance; feedback amplifiers; CMOS process; bandwidth 10 MHz to 100 MHz; closed-loop bandwidth; current feedback amplifier; current gain; gain 0 dB to 20 dB; harmonic distortion; load capacitance; parasitic extracted simulation; power 3 mW to 4.4 mW; power bandwidth scaling; power saving; size 0.18 mum; time 33 ns; voltage 3.3 V; Bandwidth; Feedback amplifiers; Feedback circuits; Feedback loop; Impedance; Mirrors; Power engineering and energy; Power engineering computing; Roentgenium; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on

Conference_Location

Paris

Print_ISBN

978-1-4244-5308-5

Electronic_ISBN

978-1-4244-5309-2

Type

conf

DOI

10.1109/ISCAS.2010.5537958

Filename

5537958