Novel High Performance Second Generation Current Controlled Current Conveyor Based On CMOS Technology

The second generation current controlled conveyor(CCCII)is a current-mode circuit component,and possesses electronic adjustable features.This paper mainly studies the circuit principle,design method and application of CCCII.Firstly,it introduces the basic principle,main characters and development of the current mode circuit,and summarizes the current current in detail.Secondly,the conception,development and core application of the basic module of current mode circuits-current conveyors are introduced,and bringing in the conception of CCCII.The theory,circuit implementation model(contains BJT,BiCMOS and CMOS implement method)are introduced.Thirdly,Two new CCCII circuit structure based on CMOS technology are proposed,and simulation by using PSPICE program are given.Finally,it provides several application circuits which based on CCCII and designs a biquad high-precision tunable current-mode universal filter.The main contents of this thesis are:(1)The proposed of CCCII circuit structure with wide input voltage range and bandwidth of voltage,current transmission gain which based on CMOS technology.The core structure of this CMOS CCCII adopts cross-coupled differential pair input stage replace conventional source-coupled differential pair input stage to acquire better performance.(2)The proposed of a new high performance CCCII implementation by combining CMOS compound transistor and crosslink differential pair input stage,and by comparing the performance of the new CCCII circuit with several already published counterparts to verify the new circuit structure possesses superior performance.(3)It provides some applications which based on CCCII,and proposes a biquad high-precision tunable current-mode universal filter structure based on CMOS compound cross-coupled input stage CCCII.The proposed filter has single input,triple output and employing only four elements.This filter contains only two grounded capacitors and does not require any additional passive resistance.It possesses the advantages of simply circuit structure and tunable.