Simulation of Voltage Controlled Tunable All Pass Filter Using LM13700 OTA
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.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1071800Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 3511
 S. Franco, "Use transconductance amplifier to make programmable active filters". Electronic Design, 24(19), 1976, pp. 98-101.
 R. L. Geiger, E. Sanchez - Sinencio, "Active filter design using operational transconductance amplifiers: A tutorial", IEEE Circuits and Devices Magazine, 1, 1985, pp. 20-32.
 A. Urbas, J. Osiowski, "High-frequency realization of C-OTA secondorder active filters", Proceedings of International Symposium on Circuits and Systems (ISCAS), 3, 1982, pp. 1106-1109.
 H. Malvar, "Electronically controlled active filters with operational transconductance amplifiers", IEEE Transactions on Circuits and Systems, CAS-29, 1982, pp. 333-336.
 T. Deliyannis, Y. Sun, & J. K. Fidler, Continuous time active filter design Boca Raton: CRC Press, 1999, Ch-8.
 Y. Sun, Design of high frequency integrated analogue filters. London: IEE Press, 2002.
 A. J. Martin, J. Ramirez-Angulo, R. G. Carvajal, "Design of highperformance tunable filters based on current conveyors", Proceedings of 2005 European Conference on Circuit theory and design, Vol. 2, 2005, pp. II/103-II/106.
 N. A. Shah, S. N. Ahmad, "Electronically tunable OTA-based all-pass circuit", International Journal of Electronics, 68(6), 1990, pp. 963-966.
 M. Abuelmaati, U. Baroudi, "A programmable phase shifter for sinusoidal signals", Active and Passive Electronic Components Journal, Vol. 21, 1998, pp.107-112.
 M. T. Ahmed, I. A. Khan and N. Minhaj, "Novel electronically tunable C-multipliers," Electronics letters, vol. 31, no. 1, 1995, pp. 9-11.
 Datasheet- LM13700 Dual Operational Transconductance Amplifiers with linearizing diodes and buffers. National Semiconductor, 2004.
 Kendall. Su, Analog Filters, Kluwer Academic Publishers, 2003, Ch-14.