{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2023,10,25]],"date-time":"2023-10-25T06:15:30Z","timestamp":1698214530192},"reference-count":22,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2006,12,13]],"date-time":"2006-12-13T00:00:00Z","timestamp":1165968000000},"content-version":"vor","delay-in-days":5400,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Circuit Theory &amp; Apps"],"published-print":{"date-parts":[[1992,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>A general method for analysing asynchronous high\u2010order two\u2010frequency oscillators is presented. the oscillator model is made up of a <jats:italic>GC<\/jats:italic> non\u2010linear parallel group embedded in a linear lumped time\u2010invariant network of any order. the approach devised rests on the identification of a pair of narrow\u2010band impedance operators which permit one to derive first\u2010approximation steady state and dynamic equations in the phasor domain\u2014as well as stability criteria\u2014in a simple and expressive manner. Previous results from averaging and perturbation treatments on fourth\u2010order asynchronous oscillators are shown to be obtainable from this theory as particular cases. the sixth\u2010order oscillator chosen as an application example shows that computational efficiency and accuracy are among the features of the method.<\/jats:p>","DOI":"10.1002\/cta.4490200203","type":"journal-article","created":{"date-parts":[[2007,7,2]],"date-time":"2007-07-02T04:00:50Z","timestamp":1183348850000},"page":"117-135","source":"Crossref","is-referenced-by-count":1,"title":["A method for the investigation of high\u2010order two\u2010frequency asynchronous oscillators"],"prefix":"10.1002","volume":"20","author":[{"given":"Enrico F.","family":"Calandra","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Antonino M.","family":"Sommariva","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2006,12,13]]},"reference":[{"key":"e_1_2_1_2_2","doi-asserted-by":"crossref","first-page":"700","DOI":"10.1080\/14786442208633932","article-title":"On oscillation hysteresis in a triode generator with two degrees of freedom","volume":"43","author":"van der Pol B.","year":"1922","journal-title":"Phil. 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