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Phase calibration in mutual injection-pulled quadrature oscillators

Nikoofard, A ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. DOI: 10.1109/MWSCAS.2015.7281997
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2015
  4. Abstract:
  5. An alternative approach to analysis, design and implementation of injection-locked quadrature oscillators is proposed in this paper. A novel technique is presented which allows the effects of the mismatches due to imbalances in the I/Q paths in transceivers (TRX) to be mitigated, and hence the orthogonality of the these vectors be maintained. This technique alleviates the effects of imbalances in a transceiver between I/Q paths, which would otherwise pose many threats to the performance of the system, namely image rejection ratio (IRR) degradation, gain reduction in mixers, desensitization of the RX, and ect. As a design example, a CMOS quadrature oscillator (QOSC) at the frequency of 3.5GHz has been designed and simulated using TSMC 0.18μm technology. Monte-Carlo simulations have also been performed which indicate that the design is robust to unwanted PVT variations
  6. Keywords:
  7. Injection-locking ; Injection-pulled oscillators ; IRR ; Mode-locked oscillators ; Mutual injection-pulling ; Quadrature oscillators ; Synchronization of quadrature oscillators
  8. Source: Midwest Symposium on Circuits and Systems, 2 August 2015 through 5 August 2015 ; Volume 2015-September , 2015 ; 15483746 (ISSN) ; 9781467365574 (ISBN)
  9. URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?reload=true&arnumber=7281997