A measurement system comprised of an ultra-low-distortion function generator, lock-in amplifier, and semiconductor parameter analyzer is used for sensitive extraction of the smallsignal thermal impedance network of bipolar devices and circuits. The extraction procedure is demonstrated through measurements on several silicon-on-glass NPN test structures. Behavioral modeling of the mutual thermal...

In this paper, we present a high-efficiency wireless power transfer system with design and measurements, for three different types of receivers. The transmitter the uses Class E/F3 amplifier second harmonic reduction to reduce distortion, resonator, proposed filter is designed be load-dependent voltage source, which means that it generates output according load impedance. resonator match impeda...

We report on a very fast and low noise front-end, implemented in 0.25μm CMOS technology. The CARIOCA amplifier discriminator chip has input impedance of 10Ω, in order to be compatible with sensors of large capacitance, and a peaking time of 14ns. The conversion gain of 8mV/fC remains almost unchanged up to a detector capacitance of 120pF. A noise figure of 450e at zero input capacitance with a ...

This paper presents dynamic thermal analyses of a power amplifier. All the investigations are based on the transient junction temperature measurements performed during the circuit cooling process. The presented results include the cooling curves, the structure functions, the thermal time constant distribution and the Nyquist plot of the thermal impedance. The experiments carried out demonstrate...

A new output structure for class E power amplifier (PA) is proposed in this paper. A series LC resonator circuit, tuned near the second harmonic of the operating frequency is added to the output circuit. This resonator causes low impedance at the second harmonic. The output circuit is designed to shape the switch voltage of the class E amplifier and lower the voltage stress of the transistor. T...

We discuss the development and design of a Biomimetic Electrostatic Imaging (BEI) element for use in a future multichannel imaging instrument. Inspiration for electrostatic sensing is provided by the diverse species of fish that use passive and induced electric fields for hunting, defense, localization, and communication. Designing an electrostatic sensor is not without its challenges. Hardware...

The CARIOCA front-end is an amplifier discriminator chip, using 0.25Pm CMOS technology, developed with a very fast and low noise preamplifier. This prototype was designed to have input impedance below 10:. Measurements showed a peaking time of 14ns and noise of 450e at zero input capacitance, with a noise slope of 37.4 e/pF. The sensitivity of 8mV/fC remains almost unchanged up to a detector ca...

This paper is based on analysis of a common source - common gate low noise transconductance amplifier (CS-CG LNTA). Conventional noise analyses equations are modified by considering to the low output impedance of the sub-micron transistors and also, parasitic gate-source capacitance. The calculated equations are more accurate than calculated equations in other works. Also, analyses show that th...

This paper presents a broadband GaN pseudo high-electron-mobility transistor (pHEMT) two-stage driver amplifier based on an enhanced feedback technique for wideband system. Through well-designed parameter values of the and matching structure circuit, relatively flat frequency response was obtained over wide band. Simultaneously, in order to reduce fluctuation current caused by environmental tem...

In this paper, we present a W-band power amplifier using 28-nm CMOS process for radar applications. The designed consists of two-stage driver and last-stage amplifier. uses differential common-source topology, the adopts cascode topology. Both utilize neutralization technique at stage stability sufficient gain. Each interstage used transformer impedance matching. signal applied to first driving...