Abstract:The configuration that can work in mixed mode may be useful from IC realization viewpoint and application adaptability. This paper proposes a generalized mixed mode universal filter configuration that may be used in all possible modes i.e. voltage mode, current mode, trans-impedance mode and trans-admittance mode. The architecture uses minimum number of active and passive components reported till date and can realize all generic filter functions: low pass, band pass, high pass, notch and all pass. PSPICE simulation results agree well with experimental values. Keywords: mixed mode filter, current conveyor/CFOA, universal filter Classification: Integrated circuits References[1] O. Cicekoglu, N. Tarim, and H. Kuntman, "Wide dynamic range high output impedance current-mode multifunction filters with dual-output current conveyors," A.E.U. Int. J. Electon. Commun., vol. 56, pp. 55-60, 2002. [2] C. M. Chang, "Universal active current filter with single input and three outputs using CC II s," Electron. Lett., vol. 29, pp. 1932Lett., vol. 29, pp. -1933Lett., vol. 29, pp. , 1993 A. M Soliman, "New current mode filters using current conveyors,"A

No abstract

No abstract

This paper introduces a high speed high resolution current comparator which includes the current differencing stage and employs non linear feedback in the gain stage. The usefulness of the proposed comparator is demonstrated by implementing a 3-bit current mode flash analog-to-digital converter (ADC). Simulation program with integrated circuit emphasis (SPICE) simulations have been carried out to verify theoretical proposition and performance parameters of both comparator and ADC are obtained using TSMC 0.18 lm CMOS technology parameters. The current comparator shows a resolution of ±5 nA and a delay of 0.86 ns for current difference of ±1 lA. The impact of process variation on proposed comparator propagation delay has been studied through Monte Carlo simulation and it is found that percentage change in propagation delay in best case is 1.3 % only and in worst case is 9 % only. The ADC exhibits an offset, gain error, differential nonlinearity (DNL) and integral nonlinearity (INL) of 0.102 lA, 0.99, -0.34 LSB and 0.0267 LSB, respectively. The impact of process variation on ADC has also been studied at different process corners.

No abstract