![]() ![]() The performance of all circuits and their applications is verified using PSPICE simulation program with 0.25μ CMOS technology. Current conveyors are considered one of the best candidates as a basic building block for communication systems which include filters, variable gain amplifiers and square/triangular wave generators. Each type suits certain applications with specific terminal characteristic requirements either differential or single ended. By virtue of the efforts that have been conducted, the current conveyor types finally can be realized using CMOS technology. In this research five current conveyor types are presented in order to deeply understand DVCC. Besides, DVCC supports differential input systems which increase the immunity to noise, resulting in improved received signal. However, Current mode Differential Voltage Current Conveyor (DVCC) was able to redress this drawback by its ability to provide constant bandwidth for different gains. On the other hand, short wave extends beyond that and up to about 30MHz. Introduction to AM Radio Receivers Medium wave is a band of radio frequencies extending from 530kHz to 1700kHz. simple circuit deigns schemes but it can’t handle high frequency communication applications. The second AM receiver has a transistor amplifier, and the final AM receiver circuit uses an LM386 amplifier chip. Most analog systems are implemented using operational amplifier. The development in CMOS technology serves widely in this direction. Thus, the manufacturers are going forward to meet the mentioned specifications by developing efficient device architecture. Most common communication devices are small but have high quality of services and low power consumption to protect user’s health. To provide some background, Section II presents general expressions of the linearity metrics of a single-stage system as a function of DC parameters. The goal of this work is to characterize quantitatively the linearity of sub-micron CMOS devices using widelyknown metrics such as 1dB compression and 3rd-orderintermodulation intercept points. However, the equally important issue of linearity is not well studied. As CMOS technology scales into the sub-micron regime, issues such as excess thermal noise due to hot electron e#ects have been well documented #2#. Introduction R ADIO frequency designs in CMOS are increasingly being explored to take advantage of rapid technology advances. In particular, the linearity of short-channel MOSFETs is examined. These two #gures of merit measure the linearity of a system. Single turn potentiometers would not work here.This paper presents analytical expressions for the 1dB compression and third-order intercept points as a function of DC-bias and technology parameters.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |