This paper proposes an approach for designing a R-2R 10 bit Digital to Analog Converter (DAC) which could be made to operate at low voltage supply by efficiently exploiting the cascaded Operational Amplifier (Op-Amp) architecture. The DAC operates at a 3V power supply with a settling time of 50-100ns , dynamic range of around 50-60 dB for signals upto a frequency of 10Mhz. Graph & simulation re...

We present a broadband optical parametric amplifier design using tapered gain and tandem chirped quasi-phase-matching gratings to obtain flat gain and group-delay spectra suitable for applications such as ultrashort-pulse amplification and fiber-optic communication systems. Although a tapered-gain amplifier consisting of a single chirped grating can provide constant gain over a wide frequency r...

We present a phase locking scheme that enables the demonstration of a practical dual pump degenerate phase sensitive amplifier for 10 Gbit/s non-return to zero amplitude shift keying signals. The scheme makes use of cascaded Mach Zehnder modulators for creating the pump frequencies as well as of injection locking for extracting the signal carrier and synchronizing the local lasers. An in depth ...

This paper presents the implementation of two stage FIR (Finite Impulse Response) decimation filter using system generator and it is compared with single stage implementation of FIR filter for WiMAX Application. FIR filter with decimation factor M is subdivided into two decimation factors M1 and M2. The two different FIR filters are designed with different coefficient values and different sampl...

Optical 10-Gbit / s return-to-zero pulse transmission in cascaded communication systems using dispersion compensation of the standard monomode fiber with large amplifier spacing is examined. It is shown that pulse distortions that are due to Kerr nonlinearity are significantly diminished by symmetrical ordering of the compensation sections when the total number of precompensation and postcompen...

— This paper presents a novel compensation technique for low voltage low power three-stage amplifier driving large capacitive loads. The frequency bandwidth of this amplifier is improved due to usage of dual-active buffers in the efficient compensation network while a feed forward transconductance helps to enhance output large signal response. The paper provides a design procedure by developing...

The InAlAs/InGaAs metamorphic HEMT (mHEMT) two-stage Ka-band amplifier and DC-30 GHz distributed SPST switch were designed and fabricated using low-k benzocyclobutene (BCB) bridged technology. This fabrication technology takes the advantages of its low dielectric permittivity (2.7), low loss tangent (0.008), low curing temperature, low water up-take, and simple manufacturing process. The MMIC f...

A micropower-relevant model is extracted from the DC characteristics of an n-type buried channel Si/SiGe HMODFET (Hetero-junction Modulation Doped FET). This model is then used to design a novel monolithic SiGe single-stage class-A power amplifier for micropower operation (sub 500μW). The amplifier is fabricated and measured data of the power-gain versus operating power are presented here for t...