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Design of low-voltage high performance CMOS-Current feedback amplifier using indirect feedback compensated Op-Amp

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3 Author(s)
Nandwana, R.K. ; Motilal Nehru Nat. Inst. of Technol., Allahabad, India ; Arrawatia, M. ; Goel, N.

In this paper low-voltage high performance CMOS current feedback amplifier is designed using indirect feedback compensated operational amplifier and the results are compared with the existing topology. The operational-amplifier used has the open loop gain of 101.8 dB with 25 ns settling time, unity gain bandwidth 169.8 MHz, phase margin 70° with rail to rail output swing. The CMOS-current feedback amplifier designed using this operational-amplifier has nearly gain independent bandwidth with settling time observed as 44 ns and slew rate increment up to 20 V/¿s. The circuit is designed at 0.18 ¿m digital CMOS process with supply voltage 1.8 volt.

Published in:

ASIC, 2009. ASICON '09. IEEE 8th International Conference on

Date of Conference:

20-23 Oct. 2009