Abstract
A current-mode low input and high output impedances first-order allpass filter using two multiple output second-generation current conveyors (MOCCIIs), one grounded capacitor and one grounded resistor is presented. The suggested filter uses a canonical number of passive components without requiring any component matching condition. The frequency responses simulation results of the proposed filter confirm the theoretical analysis.
Highlights
Current conveyors (CCs) are receiving much attention for their potential advantages such as inherent wider signal bandwidths, simpler circuitry and larger dynamic range [1,2]
Current-mode active filters with low input impedance and high output impedance are of great interest because they can be directly connected in cascade to implement higher order filters [3,4]
As the current differencing transconductance amplifier (CDTA) is equivalent to the circuit composed of two second-generation current conveyors (CCIIs) with a transconductance amplifier [18], the CDTA is a relative complex device with respect to CCII
Summary
Current conveyors (CCs) are receiving much attention for their potential advantages such as inherent wider signal bandwidths, simpler circuitry and larger dynamic range [1,2]. The first-order allpass filters [10,11] each uses two current conveyors, one grounded capacitor and one grounded resistor with low input and high output impedances. The first-order allpass filter [12] uses one Z-copy current inverter transconductance amplifier and one grounded capacitor with low input and high output impedances. Each use one active component [14] were presented These circuits require passive matching conditions and the input impedances of are not low. In 2009, a current-mode first-order allpass filter uses one current differencing transconductance amplifier (CDTA) and one grounded capacitor with low input impedance and high output impedance was presented [18]. The proposed circuit has the advantages of low input and high output impedances and without requiring any element matching condition.
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