Design of Low Power gm-C Complex Filter using OTA Cells and ADC

6 Pages Posted: 5 Aug 2019

See all articles by Pavankumar Bikki

Pavankumar Bikki

National Institute of Technology (NIT), Andhra Pradesh

Sabita G

National Institute of Technology, Andhra Pradesh

Pragathi Priya K

National Institute of Technology, Andhra Pradesh

Yehoshuva Ch

National Institute of Technology, Andhra Pradesh

Sri Hari L

National Institute of Technology, Andhra Pradesh

Date Written: August 3, 2019

Abstract

This paper presents an approach for the design of complex filter and ADC in front end receivers using OTA cells.The filter is implemented using left shift and right shift notch filters and low pass filter and these notch filters are designed by shifting high pass filter.Further, the complex filter achieves high image rejection ratio and consumes low power dissipation. However, the output of complex filter is in analog form but to use the filter in various applications it should be converted to digital form. So an ADC is designed using Voltage to Time Converter and Time to Digital Converter for the conversion to digital form. The complex filter can be used for various applications like UMTS, Bluetooth, WLAN, GPS etc due to its tunability to different frequencies by applying bias current or bias voltage to internal circuit of OTA. It is also employed in bio-medical applications.The power consumed by the circuit is twenty percent less than the existing topology. The complex filter circuit is implemented usingc adence virtuoso with GPDK 90nm technology and it has power consumption of 3pw for a supply voltage of 1V.

Keywords: Low power, Complex filter, OTA, image rejection ratio, Analog to Digital Converter

Suggested Citation

Bikki, Pavankumar and G, Sabita and K, Pragathi Priya and Ch, Yehoshuva and L, Sri Hari, Design of Low Power gm-C Complex Filter using OTA Cells and ADC (August 3, 2019). Proceedings of International Conference on Recent Trends in Computing, Communication & Networking Technologies (ICRTCCNT) 2019, Available at SSRN: https://ssrn.com/abstract=3431581 or http://dx.doi.org/10.2139/ssrn.3431581

Pavankumar Bikki (Contact Author)

National Institute of Technology (NIT), Andhra Pradesh ( email )

Andhra Pradesh
India

Sabita G

National Institute of Technology, Andhra Pradesh ( email )

Andhra Pradesh
India

Pragathi Priya K

National Institute of Technology, Andhra Pradesh ( email )

Andhra Pradesh
India

Yehoshuva Ch

National Institute of Technology, Andhra Pradesh ( email )

Andhra Pradesh
India

Sri Hari L

National Institute of Technology, Andhra Pradesh ( email )

Andhra Pradesh
India

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