关键词: 电流模式电路;电流传送器;多功能滤波器

Abstract:

A current-mode multifunction filter combing OTA (operational transconductance amplifier) and second-generation current conveyor (the second generation current conveyor with multiple outputs,abbreviated as MOCCII) is proposed.The transfer function high-order universal current-mode filter is decomposed into n lossless integrator cascade forms,and the appropriate selection of the input current signal achieves low pass,high pass,band pass,and band stop filtering,without changing the internal circuit structure and the number of devices.Compared with similar circuit designs,it is simpler in structure and easier to integrate with all the passive components grounded.An example of filter design is also given.PSPICE simulation results coincide with the theoretical analysis,which verifies the feasibility of the method.The filter can be used in communications,electronics measurement and instrumentation signal processing.

Key words: current mode circuits;current conveyor;multifunction filter