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CMOS Realization of VDVTA and OTA Based Fully Electronically Tunable First Order All Pass Filter with Optimum Linearity at Low Supply Voltage ± 0.85 V

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Document pages: 11 pages

Abstract: This paper presents a new first order all pass filter configurations. The proposed all pass filter configuration employs two configurations namely VDVTA and OTAs based first order all pass filter configuration. The first proposed configuration employs a single VDVTA and one grounded capacitor whereas the second proposed configuration employs two OTAs and one grounded capacitor. Both types of proposed configurations are fully electronically tunable and their quality factors do not depend on tunable pole frequency range. The reported configurations yield low active and passive sensitivities and also have low power consumption with very low supply voltage ± 0.85 V with Bias Voltage ± 0.50 V. The PSPICE simulation of the proposed VDVTA and two OTAs based first order all pass filter configurations are verified using 0.18 μm CMOS Technology Process Parameters.

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