CRAFT: Charge Re-use Analog Fourier Transform

Bodhisatwa Sadhu, Ramesh Harjani

Research output: Chapter in Book/Report/Conference proceedingChapter


Conventional software defined radios (SDR) (Mitola, Software radios–survey, critical evaluation and future directions, in Telesystems Conference 1992) strive to digitize the RF signal and perform spectrum sensing in the digital domain. However, for wideband inputs, this translates to infeasible ADC specifications (Abidi, IEEE Journal of Solid-State Circuits, 2007). Time interleaving (O’Donnel and Brodersen, IEEE Transactions on Vehicular Technology, 2005) and N-path filter-banks (Valezquez et al., Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis, 1994; Namgoong, IEEE Transactions for Wireless Communications, 2003) have been proposed to tackle instantaneous wideband digitization. However, while time interleaving the ADCs reduces their speed, the input dynamic range (exponentially related to ADC power) remains large.

Original languageEnglish (US)
Title of host publicationAnalog Circuits and Signal Processing
Number of pages22
StatePublished - 2014

Publication series

NameAnalog Circuits and Signal Processing
ISSN (Print)1872-082X
ISSN (Electronic)2197-1854

Bibliographical note

Publisher Copyright:
© 2014, Springer Science+Business Media New York.


  • Clock Phase
  • Operational Transconductance Amplifier
  • Sampling Capacitor
  • Software Define Radio
  • Twiddle Factor


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