Recent theoretical work predicts that the quantum-limited noise figure of a x(3)-based fiber-optical parametric amplifier operating as a phase-insensitive in-line amplifier or as a wavelength converter exceeds the standard 3-dB limit at high gain. The degradation of the noise figure is caused by the excess noise added by the unavoidable Raman gain and loss occurring at the signal and the conver...

A broadband GaN reconfigurable power amplifier based on band-pass filter matching networks is presented in this work. To realize the amplifier, closed-form solution theory and distributed PIN switch are used network design. controls branch circuit of network. This PA designed for 1.2-2.0GHz 2.2-3.0GHz, which has 10W (40dBm) output at least 37.4% drain efficiency (DE) with gain higher than 10dB....

In this paper different distributed Arithmetic (DA) architectures are proposed for Finite Impulse Response (FIR) filter. FIR filter is the main part of the Digital Signal Processing. In Digital Signal Processing we can use Multiply Accumulator Circuit (MAC) and DA for filter design.MAC consumes more power and area because of multiplier and adder circuit. The design distributed arithmetic is run...

ندارد

The detected signal-to-noise power ratio is evaluated for fiber links with periodic amplification. It is shown that the highest ratio is achieved in the limit of a distributed amplifier (g = alpha), but that, alternatively, periodic amplification at intervals of alpha(-1) entails a penalty of less than 2 dB compared with the (ideal) distributed case.

group dynamic assessment (g-da) grounded in vygotsky’s socio-cultural theory (sct) is believed to have the potential to provide a context for capturing a group of learners’ zone of proximal development (zpd) (poehner & lantolf, 2010; shabani, 2010). the present study aims at testing the applicability of g-da in identifying the mediational strategies offered by a mediator during his g-da int...