We present a full range handheld probe type spectral domain optical coherence tomography (SD-OCT) method. Here, the sample arm is composed of a tilted fiber-optic cantilever scanner; thus, the phase shift concurrently occurs while sample scanning. With the phase shift, we could achieve a full range complex-conjugate-free OCT image with no additional phase shifters in the reference arm. To reali...

Benzimidazoles are among the most important nitrogen-containing heterocyclic compounds that have many pharmaceutical applications; including, antitumor, anticancer, anticorrosive, antibacterial, irritant and enzymatic interceptors. In this research, the synthesis of benzimidazoles using o-phenylenediamine and aldehyde derivatives in the presence of the nano montemurillonite in solvent-...

In this paper we introduce an offline digital calibration technique that allows the feed-forward residue compensation (FRC) architecture to provide a 70-Msps 15-bit converter with a final spurious-free dynamic range (SFDR) of over 100dB. We develop analytical expressions for the maximum accuracy that can result from this architecture. Simulations of the overall architecture including device mis...

Based on classical plate theory, standard and spectral finite element methods are extended for vibration and dynamic stability of axially moving thin plates subjected to in-plane forces. The formulation of the standard method earned through Hamilton’s principle is independent of element type. But for solving numerical examples, an isoparametric quadrilateral element is developed using Lagrange ...

Based on classical plate theory, standard and spectral finite element methods are extended for vibration and dynamic stability of axially moving thin plates subjected to in-plane forces. The formulation of the standard method earned through Hamilton’s principle is independent of element type. But for solving numerical examples, an isoparametric quadrilateral element is developed using Lagrange ...

We report the design, fabrication and characterization of a balanced optical discriminator for a high performance phase modulation-direct detection microwave photonic link (MPL). The discriminator is an integrated optical filter consisting of five ring resonators which are fully tunable using thermo-optical tuning. The discriminator is configured to yield a desired transfer where the intensity ...

This paper addresses the problem of improving the spurious free dynamic range (SFDR) for digitization by use of antenna arrays. Nonlinearities in the analog-to-digital conversion process give rise to spurious signals (harmonics and intermodulation products) that limit the overall SFDR of the digitization process. When the signal of interest arises from a sensor such as an antenna or hydrophone,...

An input-dependent integral nonlinearity (INL) model is developed for pipeline ADC post-correction. The INL model consists of a static and dynamic part. The INL model is subtracted from the ADC digital output for compensation. Static compensation is performed by adjacent sets of gains and offsets. Each set compensates a certain output code range. The frequency content of the INL dynamic compone...

110 SEPTEMBER 2004 n Part 1 of this article (in the July 2004 issue of IEEE Signal Processing Magazine), we presented an overview of the basics of direct digital frequency synthesis (DDS), simple formulas to compute bounds of the signal characteristics, and a scheme to improve the DDS spurious free dynamic range (SFDR). In this Part 2, we discuss additional tricks used to optimize DDS performan...