Processing current signals rather than voltage signals can result in networks operating with higher signal bandwidths, greater linearity and larger dynamic range. The current-conveyor is an extremely power full analog building block with current-mode capabilities making it a potential candidate for implementing high frequency networks. Current-conveyor based circuits have performance superior to that of their Operational Amplifiers or Operational Transconductance Amplifiers counterparts. This thesis introduces new design techniques for designing current-mode active filters with highorder and high frequency. These techniques are derived from passive minimum sensitivity ladder prototype filters. Comprehensive mathematical formulations are derived whereby these techniques are verified and followed by PSPICE simulations. An efficient nullor synthesis framework is developed under which these techniques are investigated. Each of the established techniques are carefully examined and used to realize active RC-nullor networks capable of facilitating a given filter requirements both in discrete and 1C designs. The work starts with the analysis and modeling of the second-generation current conveyors with non-ideal behavior represented by the transimpedance current amplifier AD844 from Analog Devices, and proceeds to investigate all possible means of producing current-mode techniques suitable for implementing high-order current-mode active filters operating at high frequency. The results introduce the new Wave-Active (WA), Linear Transformation (IRLT and ICLT) and the Leapfrog (LF) current-mode techniques. The application of these techniques to filter design produce simple and systematic way of implementation besides flexible choice of passive elements joining the current-conveyor parts. The final step is a comparison between these techniques to explore them and make the selection procedure easy and satisfactory.