The Study Of Current-Mode Filters Based On The Modified Second-Generation Current Conveyors

Along with the development of the electronics industry, the request of the frequency proceeding in the electric circuit signal is higher and higher, the voltage type operate amplifier , s self weakness are beginning to baffle his applications in the high frequency ,high-speed environment. The traditional voltage-mode is already less and less in keeping with in the future the development request of the electric circuit.Taking current as the signal variable the electric circuit of the quantity in the signal the processing of huge latent advantage gradually know to combine is scoop out. Become a kind of new electronics circuit-current-mode circuit.It is replacing the traditional design method of the voltage-mode in the high frequency high-speed signal processing realm。This thesis mainly discussed the Modified Second-generation Current conveyors based on the current-mode kinds of new cuicuit components, They are stronger modified standard current-mode parts in fuctions on this foundation .mainly including the Modified Differential Difference Current Conveyor(MDDCCII),the Fully Balanced Second generation Current conveyor(FBCCII),(Full Balances)Four-Terminal Floating Nullor(FBFTFN) and The Current Differencing Buffered Amplifier(CDBA), they are all function very strong standard current-mode parts, They all can provide some circuit functions of better than general operation amplifier, because they have the voltage importation and the current importation, Therefore use it since can carry out the voltage-mode signal processing circuit expediently, can also carry out the current-mode signal processing circuit expediently, And have to increase the benefit bandwidth to accumulate more widely than the voltage-mode, but have their advantages more according to the current-mode filter of the modified current conveyor, because it constitutes in brief, The filter wave function is stronger and they are better than in general use operation amplifier of many advantages, be easy to composing for example,high speed,frequency bandwidth,The power supply voltage requests low,consume small, the Impedance is different from etc. advantages,otherwise they have biggish dynamic range,and flexible circuit synthesize,so they are the best active parts. solve under the traditional voltage-mode of the place of much shortage.This thesis introduced the basic concept of the current-mode circuit and the basic theories of the filter first, Then from the principle and the port characteristic of (CCII) the second generation current conveyor , Analysis in recent years newly arisen of the current-mode filter the basic theories and domestic and international research circumstance carried on concretly,Finally with the Modified Second Generation Current Conveyors :the MDDCCII,FBCCII,FTFN,FBFTFNT and CDBA etc. of the type with the...