Abstract
This paper presents two new CMOS realization circuits of the pseudo-differential current conveyor (PDCC) in which the second realization is a modified version of the first one. The modified PDCC has a wide dynamic input and output ranges with low distortion. The PDCC CMOS circuits are formed from two stages, input stage and output stage, and operating under a supply voltage of ±1.5 V. The input stage of the PDCC is realized using two wide linear range transconductors, and the output stage consists of a class AB push-pull network, which guarantees high current driving capability and low standby current. The first realization of PDCC exhibits dynamic input range of ±1.4 V with a total standby power dissipation of 4.08 mW, while the second realization of the PDCC exhibits a wide dynamic input range of ±2.1 V with a total standby power dissipation of 3.68 mW. The PDCC is used to realize mixed-mode fully differential VGA and a differential-mode bandpass filter. PSPICE simulations of the proposed PDCC and its based applications are given using 0.25-μm CMOS technology from TMSC MOSIS.
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