Radio communication systems of the future will require a large increase in user capacity. To achieve this, cell sizes will reduce and the number of base stations will increase. Current base station architectures use analogue combining techniques which are expensive, voluminous and inflexible. This thesis investigates a Digital Signal Processing (DSP) solution which produces a cheaper, smaller a...

The static characterization of the output section of the Arbitrary Waveform Generator (AWG) requires that its output signal must be digitalized by Analog to Digital Converter (ADC) with higher linearity and resolution than the device under test. In the literature, the problem of high resolution acquisition is translated to the simpler problem of low resolution and high sampling frequency acquis...

We describe theoretically a method of obtaining pulse compression and simultaneously improving amplification in a degenerate optical parametric amplifier by use of quasi-phase-matched engineered crystals. The scheme combines the possibility of increasing the signal spectral bandwidth that is offered by a degenerate parametric amplifier with the ability of engineered aperiodically poled crystals...

This paper demonstrated the first 2-stage, 2.8W, 1.8V, 1.9GHz fully-integrated DAT power amplifier with 50Ω input and output matching using 0.18μm CMOS transistors. It has a small-signal gain of 27dB. The amplifier provides 2.8W of power into a 50Ω load with a PAE of 50%.

This paper proposes novel feedforward architecture of a second-order ΔΣAD modulator with single DACfeedback topology. ΔΣAD modulator realizes high resolution by oversampling and noise shaping technique. However, its SNDR (Signal to Noise and Distortion Ratio) is limited by the dynamic range of the input signal and non-idealities of building blocks, particularly by the harmonic distortion in amp...

This paper presents a new engineering approach to audio clipping preamplifier that can be used for the tone modification and volume control of electronic devices. The approach consists of a unique design based on a summation amplifier, Silicon Controlled Rectifiers (SCR) and RC networks that enables signal gain, improved frequency response, tone modification and signal shape clipping. The propo...

Electrical power quality signal generator, capable of reproducing power quality disturbances in accordance with European quality standard EN50160, is presented in this paper. Signal generator is divided in two parts: LabVIEW based virtual instrumentation software for defining the disturbance parameters and hardware electronics for signal generation (data acquisition card and power amplifier). T...

Received Sep 19, 2017 Revised Dec 30, 2017 Accepted Jan 17, 2018 This paper presents the development of low noise amplifier integrated circuit using 130nm RFCMOS technology. The low noise amplifier function is to amplify extremely low noise amplifier without adding noise and preserving required signal to a noise ratio. A detailed methodology and analysis that leads to a low power LNA are being ...

Most low noise amplifier designs focus on eliminating sources of noise that are intrinsic to the amplifier (thennal noise, Ilfnoise). As integrated drcuit design moves increasingly towards mixed signal implementations, the design of low-noise analog amplifiers must be re...evaluated to consider the switching noise generated by on-<:hip digital circuitry. We designed three fully differential ver...