An experimental VHF DC/DC converter aimed at envelope-tracking amplifiers for space applications is presented. Based on Gallium Nitride components, it capable of operating in the range tens watts, as required by on-board transmitters. When driven a 50-MHz PWM signal, reaches peak efficiency 91.6%. A detailed breakdown associated losses reported order to identify contributions. Additional measurements 67 MHz show 89.8%.

This work presents a new design methodology for radio frequency (RF) integrated circuits based on unified analysis of the scattering parameters circuit and gm/ID ratio involved transistors. Since are parameterized by means physical characteristics transistors, designers can optimize transistor size biasing to comply with specifications given in terms S-parameters. A complete cascode low noise amplifier (LNA) MOS 65 nm technology is taken as case study order validate approach. In addition,...

In this work, the design and implementation of an open source software hardware system for Internet Things (IoT) applications is presented. This permits remote monitoring supplied data from sensors webcams control different devices such as actuators, servomotors LEDs. The parameters which have been monitored are brightness, temperature relative humidity all constitute possible environmental factors. installation realised through a server managed by administrator. device rules Raspberry Pi,...

Oscillation-based built-in self-testing (OBIST) is a promising technique for component testing in RF systems-on-chip. We propose an OBIST scheme 2.4 GHz LNA 0.35μ m CMOS that integrates the switching and matching circuitry, thereby reducing chip area required OBIST. further demonstrate, simulation, use of differential frequency-selective on-chip power detection both f <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> P...

This work presents the design of a temperature sensor in 65nm CMOS technology, which is powered by harvesting electromagnetic energy ISM frequency band (2.4GHz). The power consumption was substantially reduced so that required to operate could be stored 50μF external capacitor. rectifier sensitivity has been improved as allow autonomous operation from distance 2m conventional Wi-Fi transmitter (2.4GHz@100mW). To achieving these features, all circuits were designed for operating at 0.5V...

In the nanoscale technologies, on-chip Power Management design strategy as a part of System on Chip (SoC) is becoming extremely important. This work presents fully integrated SIMO converter in CMOS 65 nm technology. Since passive components are also and their values should result relatively small operates at switching frequency 200 MHz. version counts with step-up step-down outputs, but it can be easily extended to more otuputs. A suitable control for high speed nano-scale process together...

This work presents a new methodology for designing cascode low noise amplifier using the scattering parameters together with gm/ID of transistors. A CMOS 65 nm technology was chosen to demonstrate validity this methodology. Normally there are two ways design LNA, first them is looking maximum gain and other look minimum figure. In both approximations were carried out. addition, allows us find best solution or trade-off between figure without any difficulty.

A novel scheme for a CMOS low-voltage reference is proposed. It uses current subtraction between the currents generated by two instances of same generator circuit, each one configured with different magnitude and temperature coefficients. Temperature stability achieved owing to partial compensation MOSFET threshold voltage mobility effects. For nominal 436.5 mV, SPICE simulation reveals ±38.2 ppm/°C coefficient within range -20 °C 100°C.

Oscillation based testing (OBT) relies on converting the Circuit Under Test (CUT) into an oscillator during test phase by adding a feedback loop in order to provoke self-sustained oscillation which is monitored at output. The output frequency and amplitude has previously been shown found sensitive variation OBT's passive circuit, while choice of topology was influence discrimination between faulty non-faulty circuits idealized circuits. In this work, we evaluate fault three different OBT...

This work presents a design methodology for RF circuits. It is based on the transistor physics, provided by MOS advanced compact model (ACM) and scattering parameters, which have been expressed in function of transconductance-to-current ratio (g <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">m</sub> /I xmlns:xlink="http://www.w3.org/1999/xlink">D</sub> ) transistors. Since parameters circuits are parameterized means g ratios MOST, designers can...

This paper proposes a novel fully differential ultra-low voltage transimpedance amplifier (TIA) based on CMOS translinear circuit. Following simple bias strategy, its gain can be adjusted to the desired accuracy either by means of an external resistor or using internal and current references. To first order approach, transresistance results independent from technological parameters. The does not need common mode feedback circuit (CMFB) set quiescent output voltages. was sized simulated in...

This paper presents experimental results showing that the energy contained in beta radiation can be harvested by using diodes. A single BPW34 photodiode generates around 12 pA dc, so enough to power integrated analog blocks.

This paper presents a novel method for calculating optimal specifications of the blocks RF receiver from constraints standard and architecture. An application is made IEEE 802.15.4. The novelty this to offer realistic solutions, thanks nonlinear constrained optimization.

Nowadays, the semiconductor market is growing exponentially in many sectors and more particularly applications of Internet Things (IoT) “harsh” environments. These so-called harsh environments result difficult operating conditions for electronics. To guarantee reliability operations such environments, devices must be tested specified extreme conditions. In case exposure to ionizing radiation, tests are generally carried out on specific facilities as a cyclotron. Unfortunately, access this...

In this work, the design of a new architecture Continuous Time (CT) MASH 2-2 (multi-stage noise shaping modulators) full feedforward Sigma Delta (ΣΔ) modulator is presented. This carried out by using Discrete-Time (DT) first and Impulse-Invariant transformation techniques later. proposal, structures, that allows implementation stable high-order modulators, are combined with architectures which reduce signal ranges required at integrators inputs outputs. combination leads to swing slewing...

Oscillation based testing (OBT) of operational transimpedance amplifiers (OTAs) has previously been shown sensitive to variation in oscillator component values, with significant influence on the OBT circuit's ability discriminate between faulty and non-faulty circuits. Here, we extend prior analyses by comparing fault discrimination eight different topologies for OTAs designed 0.5 μm CMOS. It is found that appropriate choice circuit can increase sensitivity an injected up 4.86 times f <sub...

In the nanoscale technologies, on-chip Power Management design strategy as a part of System on Chip is becoming extremely important. Because value integrated passive components are low DC-DC converter operates at switching frequency high 200 MHz. The control architecture fully Single-Inductor Multiple-Outputs boost like in CMOS 65 nm technology presented this paper. counts with step-up and step-down outputs, but it can be easily extended to more outputs. circuit implementation each...

This paper presents two buck converters switching at 50 MHz and based on Gallium Nitride dice. The first converter features a diode designed for power applications demonstrates 87.9% peak efficiency. mounted the second one is aimed higher-frequency operation brings this value up above 91% in same operating conditions. Loss contributions are evaluated, showing influence of alone efficiency such converters.

The Sigma-Delta modulators that use feedforward architectures are used for the implementation of high-resolution oversampled A / D converters. If these implemented in continuous time, good results can be obtained terms consumption and other benefits. In this work, we explore ability Oscillation-Based Test (OBT) testing a continuous-time Second order sigma-delta modulator based on transconductance (gm). We present scheme uses linear characteristic feedback loop. effectiveness strategy is...

Oscillation-based testing (OBT) and built-in self-testing (OBIST) circuits enable detection of catastrophic faults in analogue RF circuits, but both are sensitive to process, voltage temperature (PVT) variation. This paper investigates 15 OBT OBIST feature extraction strategies, four approaches threshold selection, by calculating figure-of-merit (FOM) across PVT is done using a 2.4 GHz LNA <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML"...

This work presents an implementation of Dessouky's bootstrapped switch optimized for 65-nm CMOS technology to attain a high linearity in front-end sample-and-hold (S/H) circuits [6]. The simulations this design show that the spurious-free dynamic range (SFDR) achieves 100 dB single sinusoidal input signal 36.36 MHz at f <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">s</sub> =80 MHz.