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In this paper, a 3rd-order Chebyshev current-mode filter in 1.8V-0.18㎛ CMOS parameter is designed. The core circuit of the current-mode filter is composed with the proposed voltage-controlled frequency tunable current-mode integrator. Using the proposed current-mode integrator, the cutoff frequency of the filter can be controlled and also total power consumption can be reduced. HSPICE simulation results show the cutoff frequency of the filter is controlled between 1.2MHz and 10.1MHz, and the power consumption is 2.85mW at Vdd=1.8V.

Design of A Voltage-controlled Frequency Tunable Integrator and 3rd-order Chebyshev CMOS Current-mode Filter