Narrow-band 1, 2, 3, 4, 8, 16 and 24 cycles/360º angular frequency filters

Narrow-band and wide-band high-speed recursive digital filters using single filter frequency masking techniques

In this paper the design of single filter frequency masking recursive filters is discussed. We briefly review the previously proposed lowpass narrow-band filters and propose a design method for highpass narrow-band filters. Wide-band filters are also discussed. The proposed approach uses several identical filters, except for periodicity, which are mapped to a single hardware structure using fol...

Narrow-band and wide-band single filter frequency masking FIR filters

In this paper single filter frequency masking FIR filters are discussed. We briefly review the previously proposed lowpass narrowband filters and propose a design method for highpass narrow-band filters. Wide-band filters are also discussed. The proposed approach uses several identical filters, except for periodicity, which are mapped to a single hardware structure using folding. This results i...

Characterization of Narrow Band Filters for

We present a characterization of two narrow band lters commonly used in Infrared Astronomy. Our study mainly quantiies the eeect of temperature and tilt angle on the central wavelength and width of the transmission bands of such lters. This allows to evaluate some important eeects that must be taken into account to have good quality astronomical images. EEects as the limitation of the eld of vi...

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Synthesis and Leishmanicidal Activity of 1-[5-(5-nitrofuran-2-yl)-1, 3, 4-thiadiazole-2-yl]-4-benzoylepiperazines

A series of (5-nitrofuran-2-yl)-1, 3, 4-thiadiazole-2-yl derivatives 6a–6e have been synthesized and screened for in vitro anti-leishmanial activity against the promastigote form of L. major. The structure of Schiff bases were confirmed by 1H NMR, IR. Screening results indicate that all of the designed and synthesized final compounds (6a-6e) significantly reduced the viability of promastigotes ...