A novel experiment is presented which makes use of injection-lockable bipolar oscillators to measure on-chip coupling between integrated inductors. The experiment is fast, accurate and unique in that no matching, probe de-embedding or calibration is necessary as the ratio of two on-chip signals is measured to yield the results. Theoretical and simulated models of injection-locked oscillators and inductor coupling are discussed and compared to results measured using the test chip to validate the experiment. Results indicate about -35 dB of coupling between two inductors spaced 175 μm apart.

Additional Metadata
Keywords Coupling Circuits, Electromagnetic Coupling, Inductors, Injection Locked Oscillators
Conference Proceedings of the 2004 IEEE Bipolar/BiCMOS Circuits and Technology Meeting
Citation
Popplewell, P.H.R. (Peter H. R.), Amaya, R, Cloutier, M. (Mark), & Plett, C. (2004). Calibration-free on-chip inductor coupling experiment with injection-lockable VCOs. Presented at the Proceedings of the 2004 IEEE Bipolar/BiCMOS Circuits and Technology Meeting.