Simultaneous oscillation and frequency tracking of multiple resonances via digitally implemented phase-locked loop array

US11143548B2 · kind B2 · utility

Assignee

• Massachusetts Institute of Technology · US

Inventors

• Nathan Cermak · Cambridge, US
• Selim Olcum · Cambridge, US
• Steven Wasserman · Concord, US
• Scott Manalis · Cambridge, US

Key dates

• Filing date: Oct 27, 2015
• Grant date: Oct 12, 2021
• Expiry date: Oct 27, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2009/006
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Systems and Methods for controlling one or more mechanical resonators and determining information from resonant shift of the resonator(s) behavior, including at least one mechanical resonator, an excitation element for driving the resonator(s), a sensor for monitoring the motion of the resonator(s), at least one phase locked loop (PLL) in feedback between the excitation and monitoring elements, wherein each PLL is configured to operate at or near a different resonant mode of the resonator(s), and a processor for determining information from PLL internal signals indicative of a resonator frequency shift.