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Dissertations / Theses on the topic 'Log-domain filter'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

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1

Leung, Vincent W. "Analysis and compensation of log-domain filter deviations due to transistor nonidealities." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0034/MQ50637.pdf.

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2

Shiraishi, Hisako. "Design of an Analog VLSI Cochlea." University of Sydney. Electrical and Information Engineering, 2003. http://hdl.handle.net/2123/556.

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The cochlea is an organ which extracts frequency information from the input sound wave. It also produces nerve signals, which are further analysed by the brain and ultimately lead to perception of the sound. An existing model of the cochlea by Fragni`ere is first analysed by simulation. This passive model is found to have the properties that the living cochlea does in terms of the frequency response. An analog VLSI circuit implementation of this cochlear model in CMOS weak inversion is proposed, using log-domain filters in current domain. It is fabricated on a chip and a measurement of a bas

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3

Hematy, Arman. "Digitally programmable analog log-domain filters." Thesis, McGill University, 1998. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=21302.

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Frequency filtering networks have numerous applications in consumer products. For high-speed and low-voltage systems, continuous-time filters are the preferred choice---these filters have become very popular with the wireless industry. Unfortunately, continuous-time filters have a high production cost since they are not geared toward mass production. This thesis proposes an analog filter structure that can be both mass produced and customized for a particular application. Such a structure is possible through the use of a state-space approach, and log-domain filtering.<br>First, a general state

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4

Hematy, Arman. "Digitally programmable analog log-domain filters." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0024/MQ50621.pdf.

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5

Zhai, Yiming. "Adaptive log domain filters using floating gate transistors." College Park, Md. : University of Maryland, 2004. http://hdl.handle.net/1903/2132.

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Thesis (M.S.) -- University of Maryland, College Park, 2004.<br>Thesis research directed by: Dept. of Electrical and Computer Engineering . Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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6

El-Gamal, Mourad. "Generalized log-domain integrator structure & its application to the synthesis of high-frequency and low-voltage log-domain filters." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0006/NQ44420.pdf.

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7

Duerden, Geoffrey. "The development of bipolar log-domain filters in a standard CMOS process /." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33967.

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Log-domain filters have emerged in recent years as a new and important class of continuous-time filter. The attractive features of these filters include their compact structure, their potential to run at high frequencies while operating from low power supplies, and their electronic tunability. At the heart of the log-domain filtering technique is the logarithmic/exponential relationship between voltage and current in a transistor. In this work, the development of log-domain filters in CMOS technology will be investigated. The lateral bipolar transistor, inherent to CMOS processes, will be used

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8

Shaheen, Mohamed. "Design of DC-stable log-domain filters and their application in multistandard receivers." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=99118.

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A study of the concepts involved in the bias-stability of log-domain filters is presented. Through a thorough analysis of the factors contributing to the existence of multiple and unstable operating points in log-domain filters, a biquad architecture that overcomes these drawbacks is proposed. This is accompanied with a theoretical verification of both stability and the input-output linear behavior. The study provides a foundation for the design and implementation of other bias-stable log-domain circuits.<br>This thesis also presents the design of a multistandard channel-select filter for GSM,

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9

Perry, Douglas. "The design of log-domain filters based on the operational simulation of LC ladders." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22671.

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With the advent of portable communications there has been an increased emphasis on high-speed, low-power microelectronics. The log-domain filter is a novel form of continuous-time filter which shows promise in this area. Based on the translinear principle, log-domain filters are simple in structure, fast and easily tunable.<br>This thesis will present a technique for the design of log-domain filters which is based on the operational simulation of LC ladders. The technique is demonstrated through the complete design of a fifth-order Chebyshev log-domain filter, as well as the design of elliptic

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10

Subramanian, Shyam. "Methods for synthesis of multiple-input translinear element networks." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/22591.

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Thesis (Ph. D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2008.<br>Committee Chair: Anderson, David; Committee Member: Habetler, Thomas; Committee Member: Hasler, Paul; Committee Member: McClellan, James; Committee Member: Minch, Bradley.

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11

Chen, Jia-sheng, and 陳加昇. "Log-Domain Filter Based on CMOS Pseudo Exponential circuit." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/kgt366.

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碩士<br>國立中山大學<br>電機工程學系研究所<br>97<br>On traditional filters, we usually need a trade off between low-voltage and high dynamic range. The companding filters may solve this problem. This thesis presents a pseudo-exponential third-older low pass filter. All MOSFETs are operated in saturated region to obtain high frequency. The filter has small chip area and less MOSFETs. The filter has supply voltage of 3V, has cutoff frequency of 3MHz to 10MHz, and 1.06mW power dissipation. We will first employ Hspice to simulate the log-domain filter to ensure the correctness of the circuit and make it a reliable

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12

Chang, Hsiu-Cheng, and 張修誠. "A Log-Domain Filter Based On CMOS Pseudo-Exponential Circuit." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/p7324k.

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碩士<br>國立中山大學<br>電機工程學系研究所<br>96<br>In this thesis, a CMOS tunable second-order log-domain filter using pseudo-exponential approximation is proposed. MOSFETs in the circuit are working in the saturation region. This filter has higher frequency response than that of weak inversion CMOS filter. The circuit has been fabricated with 0.35um CMOS technology. It operates with a supply voltage 3V, internal capacitance C is 1pF, the biasing current varies from 2uA~10uA. The cutoff frequency can be turned from 2MHz~37.5MHz. The harmonic distortion is 0.93% and the power consumption is 772uW.

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13

Lin, Hsin-hsiu, and 林信修. "A Tunable Log-Domain Filter Using Vertical Bipolar Junction Transistor." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/ya54r4.

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碩士<br>國立中山大學<br>電機工程學系研究所<br>95<br>Traditionally, the design of continuous time active filters usually has a trade offbetween low-voltage and high dynamic range. One way to solve this problem is companding technology. There are two methods for companding filters. The first method utilizes the exponential I-V characteristics of BJT in the saturation region. In order to reduce the cost andintegrate the analog and digital circuits, the other method was exploited using CMOS process. In this project, a new first-order low pass log-domain filter based on CMOS parasitic vertical BJTwill be proposed.

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14

Wang, Wei-Ping, and 王威評. "Design of Current-Mode Log-Domain Filters." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/19788106386713886406.

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碩士<br>國立成功大學<br>電機工程學系<br>89<br>In this thesis, we implement current-mode log-domain filters by applying MOSFET square law. With respect to different type of filters, we propose an approach to maintain the same operating range of the external current sources. We utilize MATLAB to perform the linear regression analysis of the simulation results. By applying the linear regressive equations, we can calculate the necessary currents and then substitute these currents into the filter to complete our design. We simulate first-order lowpass, second-order lowpass, second-order bandpass, and biquad filt

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15

Tola, Abdullah Tahsin. "A study of nonideal log domain and differential Class AB filters /." Diss., 1999. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:9955180.

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16

Φραγκούλης, Νικόλαος. "Ανάπτυξη νέων δομών φίλτρων στο λογαριθμικό πεδίο με χρήση της κυματικής μεθόδου". Thesis, 2005. http://nemertes.lis.upatras.gr/jspui/handle/10889/1823.

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Τα φίλτρα λογαριθμικού πεδίου (log-domain filters) είναι μια οικογένεια φίλτρων συνεχούς χρόνου στην οποία γίνεται χρήση της μη-γραμμικής I/V χαρακτηριστικής των ενεργών στοιχείων (BJT τρανζίστορ, MOSFET τρανζίστορ σε ασθενή αναστροφή) για να επιτευχθεί γραμμική συμπεριφορά από είσοδο σε έξοδο. Επιπρόσθετα τα log-domain φίλτρα, προσφέρουν και άλλα πλεονεκτήματα, όπως την ηλεκτρονική ρύθμιση της συχνότητας αποκοπής, την λειτουργία σε υψηλές συχνότητες και την δυνατότητα λειτουργίας με χαμηλή τάση τροφοδοσίας. Στην παρούσα διατριβή προτείνεται μια καινούρια τεχνική σχεδιασμού log-domain φίλτρω

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17

Καφέ, Φιλομήλα. "Σχεδίαση φίλτρων με μεγάλες σταθερές χρόνου και χαμηλή τάση τροφοδοσίας στο πεδίο του λογαρίθμου". Thesis, 2013. http://hdl.handle.net/10889/6190.

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Οι εφαρμογές της σύγχρονης τεχνολογίας επιτάσσουν τη χρήση συσκευών με όσο το δυνατόν μικρότερες διαστάσεις, χαμηλή τάση τροφοδοσίας, χαμηλή κατανάλωση ισχύος και ταυτόχρονα υψηλές επιδόσεις. Το αντικείμενο της εργασίας αυτής, αφορά στη σχεδίαση αναλογικών ολοκληρωμένων φίλτρων, χαμηλής τάσης τροφοδοσίας, για υλοποίηση μεγάλων σταθερών χρόνου, στο πεδίο του λογαρίθμου. Προς αυτή την κατεύθυνση, μελετώντας και σχεδιάζοντας δομές αναλογικών φίλτρων στο πεδίο του λογαρίθμου, επιτεύχθηκε η σχεδίαση φίλτρων δεύτερης τάξης με μεγάλες σταθερές χρόνου, διατηρώντας τις φυσικές διαστάσεις των κυκλωμάτω

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