CMOS CURRENT-MODE INTEGRATOR ANDDIFFERENTIATOR FOR LOW VOLTAGE AND LOW POWER APPLICATIONS

Document Type : Research Paper

Author

Electronics and Communications Department, Faculty of Eng.,Zagazig University, Zagazig. Egypt.

Abstract

A new approach for CMOS Current-Mode Integrator (CMI) and Differentiator (CMD) realization
are presented in this work. The proposed circuits are employed the inverter-based second-generation
current conveyor (CCII). The CCII circuit achieves minimum number of stack transistors between
the rail supply and class AB operation ability. Therefore, the proposed circuits are considered as low
voltage and low power (LVLP) analog circuit. Moreover, the programmability of the proposed CMI
and CMD can be realized using transconductance gain of the CMOS inverter. The CMOS inverter
is characterized using a set of free hand equations, which are,modeled the CMOS inverteras analog
device. The high input impedance of the CMOS inverter simplifies design of the op-amp since it is
loaded only by capacitor. Second order filter is realized using the proposed CMI and CMD. The
designed filter achieved independently center frequency (o) and quality factor (Q) tuning. The
proposed circuits are designed and simulated using the MOST parameters of IBM 0.13μ CMOS
technology.

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