VCO Gain and Injection-Locking to Measure Inductor Coupling on ICs

Peter Popplewell

ISBN 10: 3843367019 / ISBN 13: 9783843367011

Published by LAP LAMBERT Academic Publishing Nov 2010, 2010

About this Item

This item is printed on demand - it takes 3-4 days longer - Neuware -The theoretical behavior of oscillators is explored using the -gm model. Mathematical derivations based on the model show that the frequency response of an LC oscillator resembles that of a high-Q bandpass filter with exceptionally high, but finite, pass-band gain. The linear derivations predict a 20 dB/decade roll-off beyond the loaded 3 dB corner frequency which is consistent with the accepted phase noise model of the oscillator. The demonstrated oscillator gain shows how oscillators can be used in non-traditional roles such as active filters or amplifiers. As an oscillator has gain within a determinable bandwidth and an injection-locked oscillator has the same output power as an identical oscillator operated free-running, on-chip inductor coupling can easily be measured using oscillators. The design, implementation, and measurements of a unique experimental test chip and PCB for measuring on-chip inductor coupling easily and accurately are presented. The experiment requires no calibration, matching, or probe de-embedding and makes use of an injection-locked bipolar oscillator acting as a transmitter and a free-running bipolar oscillator behaving as a receiver. 136 pp. Englisch.

Seller Inventory # 9783843367011

Bibliographic Details

• Title: VCO Gain and Injection-Locking to Measure Inductor Coupling on ICs
• Publisher: LAP LAMBERT Academic Publishing Nov 2010
• Publication Date: 2010
• Language: English
• ISBN 10: 3843367019
• ISBN 13: 9783843367011
• Binding: Taschenbuch
• Condition: Neu
• Dimensions: 220W x 150H x 9D millimeters 220 millimeters width by 150 millimeters height by 9 millimeters depth
• Weight: 221 grams

About this title

Synopsis

The theoretical behavior of oscillators is explored using the ?gm model. Mathematical derivations based on the model show that the frequency response of an LC oscillator resembles that of a high-Q bandpass filter with exceptionally high, but finite, pass-band gain. The linear derivations predict a 20 dB/decade roll-off beyond the loaded 3 dB corner frequency which is consistent with the accepted phase noise model of the oscillator. The demonstrated oscillator gain shows how oscillators can be used in non-traditional roles such as active filters or amplifiers. As an oscillator has gain within a determinable bandwidth and an injection-locked oscillator has the same output power as an identical oscillator operated free-running, on-chip inductor coupling can easily be measured using oscillators. The design, implementation, and measurements of a unique experimental test chip and PCB for measuring on-chip inductor coupling easily and accurately are presented. The experiment requires no calibration, matching, or probe de-embedding and makes use of an injection-locked bipolar oscillator acting as a transmitter and a free-running bipolar oscillator behaving as a receiver.

About the Author

Dr. Popplewell received his PhD in 2010 from Carleton University, Canada. In 2008 he joined Skyworks Solutions, designing analog/RF ICs for wireless applications. For his academic research he was awarded Carleton?s University Medal (2010), the IEEE SSCS Pre-Doctoral Fellowship (2007), and the NSERC of Canada Postgraduate Scholarship (2002-05).