A two-channel time-interleaved second-order sigma-delta modulator for broadband applications including asymmetrical digital subscriber line (ADSL) is presented. The proposed two-channel modulator uses a single integrator channel which does not require additional active elements for the quantizer input generation, since the integrator outputs are directly used as the input of the quantizers. As ...

Different architectures have been proposed for FPGA implementation of Universal Modulator. The Look up table (LUT) technique is one way of realizing universal modulator. Here the CORDIC is used for efficient realization of Universal Modulator. The coordinate rotation digital computer (CORDIC) algorithm is widely used in various technological fields such as digital signal processing (DSP), biome...

This study introduces a reversible optical fulladder. Also optical NOT and NOR gates are implemented through Electro-Absorption-Modulator / Photo Detector (EAM/PD) pairs, were utilized for fulfilling reversible R gate. Then, reversible fulladder was designed based on the proposed reversible optical R gate. The operation of the suggested fulladder was simulated using Optispice and it was fou...

We present a detailed study of electrical and optical generated free carrier on the spectral characteristics silicon microring modulator. The distortion due to thermal carriers is presented, mechanism for mitigation also presented. observed that two-photon induced nonlinearity could be addressed by operating modulator at suitable bias points. Furthermore, applying small-signal drive can restore...

micrornas (mirnas) are small preserved non-coding rna molecules that regulate gene expression post-transcriptionally by targeting the 3' utr of mrnas for translational repression or degradation. the rising evidence has established the significant role of mirnas within the regulation of immune system and the prevention of autoimmunity. mir-146a has obtained an importance as a modulator of d...

We present the data required to establish the complete amino acid sequence of bovine brain modulator protein, the multifunctional calcium-dependent regulatory protein. Bovine brain modulator protein contains 148 amino acid residues and has a molecular mass of 16,680 daltons. The protein commences with an acetylated alanyl residue in accord with the previous report that its NH2 terminus was bloc...

Adaptive digital modulation in the optical domain is performed using an integrated optical modulator with a high symbol rate of 10 Gbaud. The optical digital-to-analogue conversion technique that employs an optical IQ modulator and a dual-polarization quadrature-phase-shift-keying (DP-QPSK) modulator is applicable to binary PSK, QPSK, and 16-ary quadrature amplitude modulation. Analogue modulat...

In this paper, the excess loop delay in continuous-time LC-based ƩΔ modulators, which usually has a negative effect on the stability and the signal-to-noise ratio of the modulator, can be used to simplify the modulator architecture and reduce the number of the needed feedback branches. The proposed technique is discussed and validated using a design example of a 4 th order bandpass continuous-t...