Switched-Device Power Amplier using Bias Control

In this work, a switched-device power amplier using bias control is designed and realized. The PA operates at a frequency of 100MHz. Test results show that the PA achieves a PAE of 63% at −6dB power back-off and 60% at the peak output power of 40dBm. First, an overview of the state-of-the-art PA technology and performance in high PAPR...

Fully Integrated Discrete-Time Superheterodyne Receiver in Nano-Scale CMOS

In a radio-frequency (RF) system-on-chip (SoC), a digital baseband/application processor, which occupies most of the silicon area, determines the SoC fabrication process technology and voltage supply. The rest of the circuitry, including RF front-end and frequency synthesizer, must then adopt the chosen process technology, i.e., presently low...

Li-Ion Charger for Implantable Devices - Selection of optimal charge algorithm and implementation

Deep Brain Stimulation (DBS) is a method for treating diseases like Parkinson’s Disease (PD) and various other movement disorders. An Implantable Pulse Generator (IPG) is placed in the chest and wires are run through the neck to provide electrical pulses to a certain target in the brain via an electrode. Results with this treatment are good but...

An FM-UWB Transceiver for Autonomous Wireless Systems

This thesis discusses the design and implementation of a transmitter and a receiver for an FM-UWB scheme in CMOS. The main challenge is to reach a power efficiency of better than 10 nJ/bit at a data rate of 100 kbit/s for both the transmitter and the receiver design. This thesis also discusses the design and implementation of a power management...

Fully Integrated Analog Front-end for a 2-electrode ECG device

Cardiovascular diseases are leading cause of deaths worldwide. With increasing graying population and limited health infrastructure there is a need for portable and implantable ECG devices to diagnose these diseases early on. In general an ECG device requires three or more electrodes, which need to be applied to the body via a gel, to obtain a...

OLFAR: A low frequency radio receiver for space applications

An entire front-end IC has been designed. This front-end is capable of receiving and amplifing galactic noise. The input frequency range can be digitially adjusted between 0.03 MHz and 30.0 MHz. In this frequency range it is expected that, by using correlation techniques, the H1 line caused by hydrogen in the early space, can be retrieved. This...

Models and Simulations of Carrier Transport in Novel Nanoelectronic Devices

Nanotechnology is the field of applied science and technology that aims to manipulate, test and produce devices and systems which have dimensions comparable to the atomic and molecular scale, that is few tens of nanometers and smaller. Amongst the wide range of fields touched by nanotechnology, nanoelectronics is quite a peculiar one. In fact...

An ultra low power CMOS pA/V transconductor and its application to wavelet filters

Two compact ultra low-power CMOS triode transconductor topologies denoted VLPT-g(m) and Delta-g(m) are proposed. In both circuits, input transistors are kept in the triode region to benefit from the lowest g(m)/I-D ratio. This allows achieving a small-signal transconductance g(m) down to hundreds of pA/V, making such transconductors attractive...