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Paper Abstract and Keywords
Presentation 2008-06-27 13:20
Pseudo-Linear Circuit Theory for Sinusoidal Oscillator Performance Maximization
Tuya Wuren, Takashi Ohira (Toyohashi Univ Tech) MW2008-40
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes an effective measure as objective function for quick optimization of the circuit topology and parameters in sinusoidal oscillators. The theory begins with paying attention to the impedance of the circuit virtually cut at a branch. This is called active impedance as a function of not only frequency but also device gain. The key point is that the device gain, such as gm of FET, exhibits nonlinearity with inherently a negative AM/AM conversion coefficient. We assume it to be the only major nonlinear factor and neglect others as minorities. This enables the measure to work without resorting to nonlinear circuit simulator, and drastically simplify the maximization process of primarily concerned terms of oscillator performance, i.e., oscillation amplitude and carrier-to-sideband-noise ratio at the specified frequency. The measure can derive optimum solution by analytical formulation for oscillators in basic topology. For ones in too complicated topology to be analyzed by hand-writing formulation, the measure can even carry out numerical optimization with an aid of only a linear circuit simulator.
Keyword (in Japanese) (See Japanese page) 
(in English) Oscillator / Optimization / Circuit topology / Circuit parameter / Q factor / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 118, MW2008-40, pp. 47-52, June 2008.
Paper # MW2008-40 
Date of Issue 2008-06-20 (MW) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF MW2008-40

Conference Information
Committee MW  
Conference Date 2008-06-27 - 2008-06-27 
Place (in Japanese) (See Japanese page) 
Place (in English) Toyohashi Univ. of Tech. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave signal generation techniques, etc. 
Paper Information
Registration To MW 
Conference Code 2008-06-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Pseudo-Linear Circuit Theory for Sinusoidal Oscillator Performance Maximization 
Sub Title (in English)  
Keyword(1) Oscillator  
Keyword(2) Optimization  
Keyword(3) Circuit topology  
Keyword(4) Circuit parameter  
Keyword(5) Q factor  
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Keyword(7)  
Keyword(8)  
1st Author's Name Tuya Wuren  
1st Author's Affiliation Toyohashi University of Technology (Toyohashi Univ Tech)
2nd Author's Name Takashi Ohira  
2nd Author's Affiliation Toyohashi University of Technology (Toyohashi Univ Tech)
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Speaker Author-1 
Date Time 2008-06-27 13:20:00 
Presentation Time 20 minutes 
Registration for MW 
Paper # MW2008-40 
Volume (vol) vol.108 
Number (no) no.118 
Page pp.47-52 
#Pages 6 
Date of Issue 2008-06-20 (MW) 

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