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A Novel Current–Mode High–Frequency Polyphase Filter using Multi–Output Current Differencing Transconductance Amplifiers Cover

A Novel Current–Mode High–Frequency Polyphase Filter using Multi–Output Current Differencing Transconductance Amplifiers

By: Hao Peng,  Chunhua Wang and  Xiaotong Tian  
Open Access
|Nov 2016

Abstract

This paper introduces a novel polyphase filter working at high centre frequency using multi-output current differencing transconductance amplifiers (MOCDTAs). The MOCDTA possesses characteristics of low input impedance, high output impedance, wide work frequency and linearly adjustable transconductance. The proposed filter consists of two MOCDTAs, two grounded capacitors, and no resistors. The features of low input impedance and high output impedance make it suitable for cascade. The bandwidth and centre frequency could be adjusted independently by external bias voltage VC and VCa. The image rejection ratio (IRR) could reach 31.6 dB at the centre frequency of 114 MHz, and its bandwidth could be 11.1 MHz. Besides, the centre frequency could be tuned from 38 MHz to 150 MHz with bandwidth of 20.1 MHz. Simulation results which verify the theory are included.

DOI: https://doi.org/10.1515/jee-2016-0046 | Journal eISSN: 1339-309X | Journal ISSN: 1335-3632
Language: English
Page range: 311 - 322
Submitted on: Feb 9, 2016
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Published on: Nov 2, 2016
In partnership with: Paradigm Publishing Services
Publication frequency: 6 issues per year

© 2016 Hao Peng, Chunhua Wang, Xiaotong Tian, published by Slovak University of Technology in Bratislava
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.