Single-input Multiple-output Tunable Log-domain Current-mode Universal Filter

This paper describes the design of a current-mode single-input multiple-output (SIMO) universal filter based on the log-domain filtering concept. The circuit is a direct realization of a first-order differential equation for obtaining the lossy integrator circuit. Lossless integrators are realized b...

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Main Authors: P. Prommee, K. Dejhan
Format: Article
Language:English
Published: Spolecnost pro radioelektronicke inzenyrstvi 2013-06-01
Series:Radioengineering
Subjects:
Online Access:http://www.radioeng.cz/fulltexts/2013/13_02_0474_0484.pdf
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author P. Prommee
K. Dejhan
author_facet P. Prommee
K. Dejhan
author_sort P. Prommee
collection DOAJ
description This paper describes the design of a current-mode single-input multiple-output (SIMO) universal filter based on the log-domain filtering concept. The circuit is a direct realization of a first-order differential equation for obtaining the lossy integrator circuit. Lossless integrators are realized by log-domain lossy integrators. The proposed filter comprises only two grounded capacitors and twenty-four transistors. This filter suits to operate in very high frequency (VHF) applications. The pole-frequency of the proposed filter can be controlled over five decade frequency range through bias currents. The pole-Q can be independently controlled with the pole-frequency. Non-ideal effects on the filter are studied in detail. A validated BJT model is used in the simulations operated by a single power supply, as low as 2.5 V. The simulation results using PSpice are included to confirm the good performances and are in agreement with the theory.
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spelling doaj.art-88679997b8ca46c299872c4949c25f852022-12-22T03:32:41ZengSpolecnost pro radioelektronicke inzenyrstviRadioengineering1210-25122013-06-01222474484Single-input Multiple-output Tunable Log-domain Current-mode Universal FilterP. PrommeeK. DejhanThis paper describes the design of a current-mode single-input multiple-output (SIMO) universal filter based on the log-domain filtering concept. The circuit is a direct realization of a first-order differential equation for obtaining the lossy integrator circuit. Lossless integrators are realized by log-domain lossy integrators. The proposed filter comprises only two grounded capacitors and twenty-four transistors. This filter suits to operate in very high frequency (VHF) applications. The pole-frequency of the proposed filter can be controlled over five decade frequency range through bias currents. The pole-Q can be independently controlled with the pole-frequency. Non-ideal effects on the filter are studied in detail. A validated BJT model is used in the simulations operated by a single power supply, as low as 2.5 V. The simulation results using PSpice are included to confirm the good performances and are in agreement with the theory.www.radioeng.cz/fulltexts/2013/13_02_0474_0484.pdfLog-domain filteringvery high frequencylow-voltageelectronically-controlleduniversal filter
spellingShingle P. Prommee
K. Dejhan
Single-input Multiple-output Tunable Log-domain Current-mode Universal Filter
Radioengineering
Log-domain filtering
very high frequency
low-voltage
electronically-controlled
universal filter
title Single-input Multiple-output Tunable Log-domain Current-mode Universal Filter
title_full Single-input Multiple-output Tunable Log-domain Current-mode Universal Filter
title_fullStr Single-input Multiple-output Tunable Log-domain Current-mode Universal Filter
title_full_unstemmed Single-input Multiple-output Tunable Log-domain Current-mode Universal Filter
title_short Single-input Multiple-output Tunable Log-domain Current-mode Universal Filter
title_sort single input multiple output tunable log domain current mode universal filter
topic Log-domain filtering
very high frequency
low-voltage
electronically-controlled
universal filter
url http://www.radioeng.cz/fulltexts/2013/13_02_0474_0484.pdf
work_keys_str_mv AT pprommee singleinputmultipleoutputtunablelogdomaincurrentmodeuniversalfilter
AT kdejhan singleinputmultipleoutputtunablelogdomaincurrentmodeuniversalfilter