A 1GHz signal bandwidth 4-channel-I/Q polyphase-FFT filter bank

Hundo Shin, Ramesh Harjani

Research output: Chapter in Book/Report/Conference proceedingConference contribution


This paper presents a prototype analog 4-channel-I/Q polyphase-FFT filter bank (PFFB) using passive switched capacitor circuits to channelize wideband signals. Like FFTs, the proposed PFFB shares computations for low power. The PFFB allows for a longer 'effective window length' than is possible in a standard FFT. This characteristic of the PFFB maintains a narrow main-lobe bandwidth combined with low side-lobe amplitudes. The passive switched capacitor structure enables high linearity and low power implementation. The measured performance of the prototype fabricated in TSMC 65nm CMOS shows >40dB side-lobe suppression, +25dBm IIP3, and 208μVrms integrated output noise for all channels at 1GS/s operation. The total power consumption for the PFFB (8-channels total) is 34.6mW (34.6pJ/conv).

Original languageEnglish (US)
Title of host publicationESSCIRC 2016
Subtitle of host publication42nd European Solid-State Circuits Conference
PublisherIEEE Computer Society
Number of pages4
ISBN (Electronic)9781509029723
StatePublished - Oct 18 2016
Event42nd European Solid-State Circuits Conference, ESSCIRC 2016 - Lausanne, Switzerland
Duration: Sep 12 2016Sep 15 2016

Publication series

NameEuropean Solid-State Circuits Conference
ISSN (Print)1930-8833


Other42nd European Solid-State Circuits Conference, ESSCIRC 2016


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