In this paper, a novel Dual-Output second generation Current Conveyor (DO-CCII) circuit using resistive compensation technique is proposed. The resistive compensation technique is a very simple and powerful technique used to improve the bandwidth of CMOS DO-CCII without extra power consumption. P-spice simulations for MIETEC 0.5 µm CMOS technology show that the current mode and voltage mode bandwidths are 2.3 GHz and 3.3 GHz respectively, with power consumption of 2 mW. The simulation results, which confirm the desired results, have been included.

Recently, the focus has shifted to current-mode circuits analog signal processing, compared to voltage-mode circuits, due to their large dynamic range, better linearity and excellent frequency response. The current-mode circuits require less number of active and passive components for the realization of filter functions, compared to voltage-mode circuits. Also, addition of filter responses in current-mode circuits requires no additional hardware if taken out from high output impedance sources, and therefore is economical. Furthermore, current-mode analog signal processing gained attention due to its suitability towards Integrated Circuit (IC) fabrication techniques such as Complementary Metal Oxide Semiconductor (CMOS) and Bipolar CMOS (Bi-CMOS) technologies. Although current-mode filters are realized using Four Terminal Floating Nullors (FTFN), Current Feedback Operational Amplifiers (CFOA), and Operational Transconductance Amplifiers (OTA), yet Current Conveyors (CC) enjoy a special place in the field of analog signal processing due to their inherent advantages of large dynamic range and wide bandwidth [1-4]. Modern wireless and wire line communication systems require high-performance analog base band circuits, such as second-generation Current Conveyors (CCII). Many techniques used to maximize bandwidth of second-generation CC have been published [5-9]. These papers show the enhancement of bandwidth of CCII with an extra amount of power consumption and complex circuitry.

In this paper, a new second-generation Current Conveyor (CMOS CCII) based on resistive compensation technique is presented. The resistive compensation technique works with a very simple principle. Since it adds zero frequency to the transfer function of the current mirror, this process will cancel the effect of parasitic capacitance of the current mirror on bandwidth of CCII. The primary advantages of resistive compensation technique are enhanced frequency response, improved slew rate, and settling time of the CMOS CCII without extra power dissipation. This new design technique of CMOS CCII exhibits wide bandwidth, high slew rate, and low power consumption. The simulation results have confirmed the theoretical predictions.

Science and Technology Journal, CMOS DO-CCII, Current-Mode, Integrated Circuit, IC, Current Conveyors, CC, Four Terminal Floating Nullors, FTFN, Metal Oxide Semiconductor, CMOS, Bipolar CMOS, Bi-CMOS, Current Feedback Operational Amplifiers, CFOA.