Analysis and design of matched-impedance wide-band amplifiers with multiple feedback loops using 0.35 micro metel TSMC complimentary metal oxide semiconductor technology

This project is report on the design and analysis of matched-impedance wideband amplifiers with multiple feedback loops using 0.35µm complimentary metal oxide semiconductor technology. Nowadays, wideband amplifiers are uses in many varieties of modern electronic systems such as microwave and lightwave in communication and instrumentation system also in wireless system. There are used in many radio frequency (RF) and high-data rate communication systems including satellite transceivers, pulsed radar systems, optical receivers, etc. For such applications, a distributed amplifier topology is often used because it can overcome the classical amplifier gain-bandwidth tradeoff by combining the outputs from several active gain elements in an additive fashion. Among the many versions of wideband amplifiers, the Kukielka circuit configuration had been chosen because this is the one of the popular circuit and has a compact circuit in design. Recently, CMOS technology has attracted much attention because it is potentially a low cost process. Therefore, this paper presents the design and analysis of the Kukielka wideband amplifier using CMOS process. Multiple feedback loops were used to achieve terminal impedance matching and wideband simultaneously. Capacitive technique was also used to overcome the intrinsic over-damped frequency response of the Kukielka amplifiers and thus enhance the bandwidth. A method for estimating the s-parameters of active circuits using hand analysis and simulation are used. This method involves the determination of s-parameters from the poles of voltage-gain transfer function. It is found that the information on the frequency responses of input and output return loss, input and output impedance, and reverse isolation is all hidden in the poles or equivalently in the denominator of the voltage-gain transfer function of a circuit system.