BACKGROUND Genotyping methods that reveal single-nucleotide differences are useful for a wide range of applications. We used digestion of 3-way DNA junctions in a novel technology, OneCutEventAmplificatioN (OCEAN) that allows sequence-specific signal generation and amplification. We combined OCEAN with peptide-nucleic-acid (PNA)-based variant enrichment to detect and simultaneously genotype v-K...

In this paper first we try to analysis the behavior ofthe SOAs in the optical networks and then have proposed anumerical simple model to simulate the behavior of thesemiconductor optical amplifiers. After that by employing thismodel as inline amplifier for a DWDM optical system, we havesimulated the transmission of 10 channels with bit rate 10 Gb/sup to distance 3970 km with RZ-DPSK modulation ...

A design analysis of the power amplifiers developed for ultrasound applications was conducted because require different types amplifiers, which are one most critical electronic components in systems. To generate acoustic signals using transducers, among important mechanical devices systems, an appropriate output voltage, current, or signal must be produced by a amplifier. Therefore, amplifier t...

This paper presents a fully differential power amplifier (PA) with high efficiency and linearity. To improve the linearity, an optimum gate bias is applied for the cancellation of the nonlinear harmonics. The amplifier delivers a 6 dB of power gain. The signal noise distortion and total harmonic distortion of 55.68 dB and 0.144% has been shown. The compensation characteristics of the circuit ha...

In this paper different variations of the so-called “Tune-and-Select” (TAS) switching node for Optical Burst Switching (OBS) are investigated. Both signal degradation and burst losses limit the effective throughput of such optical burst switching nodes. These limitations are analysed for different nodes with four input/output fibres at different bit rates. The impact of amplifier noise figure, ...

Differential cross-polarization modulation (DXPoM) wavelength conversion using a semiconductor optical amplifier has been proposed to outperform substantially traditional cross-polarization modulation (XPoM). This work presents analytical small-signal models of XPoM and DXPoM. The transfer function of DXPoM is used to elucidate the significant improvement in bandwidth and the relationships amon...

For the need of higher capacity and speed, optical fiber communication system is being extensively used all over the world for telecommunication, video and data transmission purposes. Optical communication systems are employed in order to meet the challenge of high bandwidth but signal attenuation is the major limitation. Electronic regeneration of signal is used to overcome the problem but it ...

HE OUTPUT NOISE of signal amplifiers usually inT creases when the signal bandwidth increases. In addition, the use 'of low-value resistors is recommended in low-noise voltage amplifier design in order to reduce the contribution of their thermal noise to the output noise [ l ] , [ 2 ] . In the course of designing a low-noise ECG acquisition system, we have found that circuit simulations revealed...

This work presents a new RF power amplifier characterization technique based on Gaussian pulse, which is shown to approximate the envelope of multicarrier signal with 0.5% error around peaks. The standard deviation pulses inversely proportional I/Q bandwidth. test accurately capture nonlinear memory effects that result in gain dispersion after peak reached. As an example, it amplitude and phase...

A "black-box" phase sensitive amplifier is presented achieving simultaneous suppression of deterministic phase distortion on two independent 42.66 Gbit/s DPSK modulated signal wavelengths.