Although most modern monolithic solid state operational amplifiers (op-amps) are internally compensated, externally compensated units provide an invaluable degree of freedom to analog designers. As a result, these op-amps offer true 'general purposeness,' since allowing the user to choose the amplifier's compensation can drastically improve performance in many applications. This thesis proposes...

Accurate FET Model parameters need to be determined to give accurate simulation results for RF amplifiers. The accuracy required varies depending on the application of the final amplifier. For Doherty amplifiers, a high accuracy is required for the transfer characteristic of the amplifier. An amplifier was simulated using a model obtained from data sheet information, and then built. Measurement...

We show that the pump–to–signal power conversion efficiency of parametric chirped-pulse amplifiers made with periodically poled materials operating with multicolor spatial solitons can be significantly enhanced by employing engineered quasi-phase-matching gratings. Applications include compact sources of high-energy ultrashort pulses in diffraction-limited high-quality beams. © 2002 Optical Soc...

In terminals for free-space laser links, optical amplifiers boost transmit powers into the Watt range. As pre-amplifiers, they help obtaining sensitivities of a few ten photons/bit. Concepts and requirements for such applications are discussed. ©2005 Optical Society of America OCIS codes: (060.4510) Optical communications; (250.4480) Optical amplifiers

Over the last few decades, the investigation of ultrafast phenomena occurring in atoms, molecules and solid-state systems under a strong-field regime of light-matter interaction has attracted great attention. The increasing request for a suitable optical technology is significantly boosting the development of powerful ultrafast laser sources. In this framework, Optical Parametric Amplification ...

The opening up of the mm-wave band has created opportunities for high-data-rate communication, radar and medical imaging. The cost and size advantages of CMOS have motivated research on 60GHz CMOS front-end design [1]. However, very few CMOS mmwave power amplifiers (PAs) have been reported so far. Furthermore, most of the mm-wave PAs reported use bulky transmission lines [2, 3], increasing sili...

Raman amplifiers are widely used for high capacity long haul communication systems. One of the main reason for which it can be used as its improved gain. In this paper gain of Raman amplifiers is studied and analyzed for counter pumping scheme. The methods to improve the gain is proposed and discussed. The previous result is being compared with the model proposed in this paper.

This paper presents a low-cost analog test system with diagnosis capabilities. The tester is able to detect faults in any linear circuit by learning a reference circuit behavior in a first step, and comparing this behavior against the output of the circuit under test in a second step. For a faulty circuit, a third step takes place to locate the fault. The diagnosis method consists on injecting ...

The operation of a pH (Hþ ion concentration) sensitive ion-sensitive field-effect transistor (ISFET) microsystem with a sensitivity of 40– 45 mV=pH is demonstrated. This system has two identical ISFETs as the inputs to a pair of ISFET operational transconductance amplifiers (IOTAs) arranged in a novel differential architecture. The IOTAs have different sized p-MOSFET load transistors that enabl...

operational amplifiers being that of state-variables while In a survey and summary manner various methods are discussed the one for gyrators being that of non-reciprocal synthesis. for the design of linear integrated circuits. Basic to the methods ~ l t ~ ~ ~ ~ t i ~ ~ to both of these philosophies of design is a very are the practical availability of integrated operational amplifiers and gyrat...