Electronically tunable MOSFET-C voltage-mode all-pass filter based on universal voltage conveyor
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KünyeHerencsar, N., Koton, J., Vrba, K., & Minaei, S. (2011). Electronically tunable MOSFET-C voltage-mode all-pass filter based on universal voltage conveyor. In IEEE Staff (Eds.), 2011 IEEE 3rd International Conference on Communication Software and Networks (ICCSN) (pp. 442-445). Xi'an: IEEE. http://dx.doi.org/10.1109/ICCSN.2011.6014931
In this paper, a new voltage-mode first-order all-pass filter with high-input and low-output impedances is presented. The circuit is composed of single universal voltage conveyor (UVC), single capacitor, and an n-channel MOSFET-based voltage-controlled resistor (VCR) that allows to control the pole frequency 0 of the filter electronically. No component-matching constraints are required and it has low sensitivity. The proposed filter provides both of inverting and non-inverting outputs at the same configuration simultaneously. The non-idealities of the proposed circuit are also analyzed. The theoretical results are verified by SPICE simulations using TSMC 0.35 m CMOS process parameters.