2001a) ‘A programmable continuous-time floating-gate fourier processor

Content Provider	CiteSeerX
Author	Kucic, Matt Low, Aichen Hasler, Paul Neff, Joe
Abstract	Abstract—We present a programmable continuous-time floating-gate Fourier processor that decomposes the incoming signal into frequency bands by analog bandpass filters, multiplies each channel by a nonvolitile weight, and then recombines the frequency channels. A digital signal processor would take a similar approach of computing a fast Fourier transform (FFT), multiplying the frequency components by a weight and then computing an inverse FFT. We decompose the frequency bands of the incoming signal using the transistor-only version of the autozeroing floating-gate amplifier (AFGA), also termed the capacitively coupled current conveyer (C 4). Each band decomposition is then fed through a floating-gate multiplier to perform the band weighting. Finally, the multiplier outputs are summed using Kirchoff current law to give a band-weighted output of the original signal. We examine many options to reduce second-order harmonic problems inherent in the single-sided C 4. We present a method for programming arrays of floating-gate devices that are used in the weighting of the bands. All of these pieces fit together to form an elegant and systematic Fourier processor. Index Terms—Analog floating-gate arrays, floating-gate circuits, programmable analog circuits, programmable analog filters. I.
File Format	PDF
Journal	IEEE Transactions on Circuits and Systems II
Language	English
Access Restriction	Open
Subject Keyword	Programmable Continuous-time Floating-gate Fourier Processor Frequency Band Incoming Signal Band-weighted Output Band Decomposition Original Signal Second-order Harmonic Problem Many Option Frequency Component Index Term Analog Floating-gate Array Analog Bandpass Filter Floating-gate Circuit Floating-gate Device Fast Fourier Transform Kirchoff Current Law Floating-gate Multiplier Digital Signal Processor Multiplier Output Band Weighting Current Conveyer Programmable Analog Filter Inverse Fft Floating-gate Amplifier Nonvolitile Weight Frequency Channel Systematic Fourier Processor Similar Approach Programmable Analog Circuit Transistor-only Version
Content Type	Text
Resource Type	Article