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...

The performance and operation of high-speed, liquid crystal spatial light modulators are discussed in relation to a variety of system-level aspects. The issues involving the use of these devices in optical processing systems are the primary focus of this paper, but other applications such as ultra-video imaging and beamsteering are also included in the discussion.

a direct conversion modulator-demodulator with even harmonic mixers with emphasis on noise analysis is presented. the circuits consist of even harmonic mixers (ehms) realized with antiparallel diode pairs (apdps). we evaluate the different levels of i/q imbalances and dc offsets and use signal space concepts to analyze the bit error rate (ber) of the proposed transceiver using m-ary qam schemes...

QPSK or Quadrature Phase-Shift Keying is a higher order modulation scheme used in digital modulation. A direct injection locked QPSK modulator uses VCO for minimize the area of the conventional modulator. In this project injection locking scheme is used since injection locking has an advantage inphase-noise reduction ofoscillators withavery simplecircuittopology. By using proposed simple modula...

In this paper, a complete high-speed Continuous-Time Bandpass Delta-Sigma modulator for digital receiver applications is modeled, using VHDL-AMS. The main Continuous-Time DeltaSigma modulator’s nonidealities such as excess loop delay, clock jitter and multi-bit feedback DAC element mismatch in the modulator loop are also modeled and their effects evaluated. An accurate understanding of these no...