%0 Journal Article %A Bhaba Priyo Das and Neville Watson and Yonghe Liu %D 2010 %J International Journal of Computer and Systems Engineering %B World Academy of Science, Engineering and Technology %I Open Science Index 44, 2010 %T Simulation of Voltage Controlled Tunable All Pass Filter Using LM13700 OTA %U https://publications.waset.org/pdf/8924 %V 44 %X In recent years Operational Transconductance Amplifier based high frequency integrated circuits, filters and systems have been widely investigated. The usefulness of OTAs over conventional OP-Amps in the design of both first order and second order active filters are well documented. This paper discusses some of the tunability issues using the Matlab/Simulink® software which are previously unreported for any commercial OTA. Using the simulation results two first order voltage controlled all pass filters with phase tuning capability are proposed. %P 1199 - 1203