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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Calandra, E.F. Caruso, M. Lupo, D. |
| Copyright Year | 2011 |
| Description | Author affiliation: Dipartimento di Ingegneria Elettrica, Elettronica e delle Telecomunicazioni, Università di Palermo, Viale delle Scienze, Ed. 9, 90128, Italy (Calandra, E.F.; Caruso, M.; Lupo, D.) |
| Abstract | The problem of the correct evaluation of Q-factor appearing in Adler's equation for injection-locking is addressed. Investigation has shown that recent results presented in the literature, while extending applicability of the original method, do not completely account for nonlinear effects occurring when two-port active devices are involved. To overcome such limitation, use can be made of a newly developed theory in the dynamical complex envelope domain, capable of providing first-approximation exact dynamical models of driven quasi-sinusoidal oscillators. Some preliminary results are presented here concerning a class of injection-locked oscillators with single-loop feedback type configuration. The proposed procedure permits evaluation of the nonlinear oscillator Q-factor, either analytically or numerically, depending on the complexity of the nonlinear active device model involved. The example worked out, a MOST-equipped driven Colpitts scheme, clearly illustrates the accuracy improvement achieved in the determination of the locking bandwidth stemming from the newly defined effective Q-factor, without the need to resort to the very time consuming full numerical transient envelope simulations otherwise required to this purpose. |
| Starting Page | 110 |
| Ending Page | 113 |
| File Size | 620454 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781457706172 |
| e-ISBN | 9781457706189 |
| e-ISBN | 9781457706165 |
| DOI | 10.1109/ECCTD.2011.6043289 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2011-08-29 |
| Publisher Place | Sweden |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Q factor Numerical models Mathematical model Transistors Integrated circuit modeling Oscillators Equations |
| Content Type | Text |
| Resource Type | Article |
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