Method and apparatus of synchronizing oscillators

摘要

A circuit includes a first oscillator and a second oscillator. The first oscillator includes an inductive device, a capacitive device, and an active feedback device configured to output a first output signal having a predetermined frequency according to electrical characteristics of the inductive device of the first oscillator and electrical characteristics of the capacitive device of the first oscillator. The second oscillator includes an inductive device, a capacitive device, and an active feedback device configured to output a second output signal having the predetermined frequency according to electrical characteristics of the inductive device of the second oscillator and electrical characteristics of the capacitive device of the second oscillator. The inductive device of the first oscillator and the inductive device of the second oscillator are magnetically coupled.

主权项

1. A circuit comprising:
a first oscillator, the first oscillator comprising:
a first tank circuit comprising a first inductive device; anda first active feedback device coupled to the first tank circuit, the first active feedback device being configured to output a first output signal having a predetermined frequency according to electrical characteristics of the first tank circuit; and a second oscillator, the second oscillator comprising:
a second tank circuit comprising a second inductive device, the first tank circuit and the second tank circuit being magnetically coupled; anda second active feedback device coupled to the second tank circuit, the second active feedback device being configured to output a second output signal having the predetermined frequency according to electrical characteristics of the second tank circuit; wherein the first inductive device and the second inductive device are separated by a distance equal to or less than a predetermined distance, the predetermined distance being one half of a wavelength of an electromagnetic wave having the predetermined frequency.