Voltage tunable current MODE KHN filter based on current differencing transconductance amplifier (CDTA)
The era of SoC design has great dependency on CMOS circuits owing to its low power and high reliability which could contribute in the effective circuit designing. Here, a unique approach for the designing of voltage tunable current differencing transconductance amplifier (CDTA) is reported for the realization of Kerwin–Huelsman–Newcomb (KHN) filter. The proposed design has been simulated by using Cadence Virtuoso simulation tool with 0.18 [Formula: see text]m technology parameters. This design is based on input voltage-based gain and frequency of operation tuning approach. In this reported design of filter, cutoff frequency can be tailored by input voltage instead of input current. This relaxes the need for the iterative circuit modifications to work in a particular frequency range. Thus, the reported CDTA design is expected to be robust and offers higher design flexibility as there is now no need of iterative designing and calibration in this approach. This also exhibits retained area requirement as per the current state of the art for the KHN filters. Further, the performance of designed CDTA-based KHN filter has also been verified with the existing KHN filters.