Distinguished Lecture Series: Wide Tuning-Range VCOs Using Multi-Mode Resonators
LC VCOs are commonly used for RF carrier generation. A wide tuning range in a single VCO is desirable for covering multiple bands while occupying a small area. An octave tuning range enables continuous coverage of all lower frequencies by integer frequency division. LC VCOs are most often tuned using variable capacitor banks and varactors. Because of switch resistances in capacitor banks and poor quality factor of varactors, using only capacitors for tuning degrades the phase noise, especially at millimeter-wave frequencies. Variable inductors using series switches pose the same problem. Mutual coupling can be exploited to realize multiple resonant modes with different effective inductances without using switches. This allows a wider tuning range without substantial reduction in the tank quality factor. Topologies for multi-mode resonant structures and their performance will be described with examples from the literature.
Date and Time
Location
Hosts
Registration
- Date: 23 Jan 2023
- Time: 04:10 PM to 05:00 PM
- All times are (UTC-05:00) Eastern Time (US & Canada)
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- 40 St George St
- Toronto, Ontario
- Canada M5S 2E4
- Building: Bahen Centre for Information Technology
- Room Number: BA B025
- Starts 12 January 2023 10:35 PM
- Ends 23 January 2023 10:35 PM
- All times are (UTC-05:00) Eastern Time (US & Canada)
- No Admission Charge
Speakers
Dr. Krishnapura of Indian Institute of Technology, Madras
Biography:
Nagendra Krishnapura obtained his BTech from the Indian Institute of Technology, Madras, India, and his PhD from Columbia University, New York. He has worked as an analog design engineer at Celight, Multilink, and Vitesse semiconductor. He has taught analog circuit design courses at Columbia University as an adjunct faculty. He is currently a professor at the Indian Institute of Technology, Madras. His interests are analog and RF circuit design and analog signal processing.
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