Conference Papers
Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506
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Item Effect of finite gain and bandwidth of feed-forward compensated OTA on active-RC integrators: A case study(2012) Rekha, S.; Laxminidhi, T.This paper analyses the effect of finite gain-bandwidth of the operational transconductance amplifiers (OTAs) on active-RC integrators. A feed-forward compensated OTA is taken as the building block of active-RC integrator. A mathematical analysis is carried out on a first order low-pass active-RC filter designed in 180 nm CMOS technology to operate at a supply voltage of 0.5 V. A non-ideality factor (NIF) has been defined that accounts for the deviation of the response from the ideal. Simulations performed on the transistor level filter justifies the mathematical analysis presented. © 2012 IEEE.Item Effect of parasitics of feed-forward compensated OTA on Active-RC integrators(2013) Rekha, S.; Laxminidhi, T.This paper analyzes the effect of parasitics of the Operational transconductance Amplifiers (OTAs) on Active-RC Integrators. The analysis is carried out for an Active-RC integrator built around a feed-forward compensated OTA designed in 180 nm CMOS technology to operate at a supply voltage of 0.5 V. A non-ideality factor (NIF) has been defined that accounts for the deviation of the response of the Active-RC integrator from the ideal. Simulations performed on the transistor level integrator justifies the mathematical analysis presented. © 2013 Springer Science+Business Media New York.Item Ultra low power active-RC filter in 180 nm CMOS technology(2013) Rekha, S.; Laxminidhi, T.This paper presents the design of a low voltage, ultra low power fifth order Chebyshev low pass filter operating at a power supply voltage of 0.5 V in 180 nm CMOS technology. A CMOS inverter based transconductor is used as the building block. A sub-threshold model is developed for the transconductor as the transistors are operating in sub-threshold region. A feedforward compensated OTA is designed using this transconductor and is used to realize the filter. Designed filter has a cutoff frequency of 150 kHz and offers a dynamic range of 54.16 dB with a figure of merit of 0.02 fJ. Power consumed by the filter is 21.79 microwatt. © 2013 IEEE.