REALIZATION OF ANALOG CIRCUITS USING ANALOG BUILDING BLOCK: CDBA

Abstract

In the recent decades, with the demand of low power supply and low area requirement due to miniaturization, a large number of Analog Building Block (ABB) has been introduce for analog signal processing. These Analog Blocks offer significant advantage over conventional op-amp. With development in this area using current mode concept having notable features like high gain, high bandwidth, simple circuit structure, high slew rate and reduce power supply voltage, these Blocks are very reliable and there performance is much better then conventional op-amp. Current mode design technique offer voltage independent, high bandwidth in analog circuits with properties of accuracy and versatility in a wide range of application. One of such analog block is Current difference buffered amplifier CDBA, on which recently a lot of research work is done. Here I have presented a study on various implementation of CDBA topology. I have also analysis Flipped Voltage Follower circuits and compare various parameter with normal source follower. Using the concept of Flipped voltage follower I have also study and implemented a CDBA[19] which is based on this concept. Using FVF based CDBA, implementation of filter and rectifier is performed and various properties of these analog circuits are studied.