The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 19, 2016
Filed:
May. 07, 2014
Analog Devices, Inc., Norwood, MA (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
Aspects of this disclosure relate to reference switchover. In one embodiment, an apparatus includes a phase error detector, a phase alignment detector, and a selection circuit. The phase error detector is configured to generate an indication of a relative phase difference between a first reference clock signal and a second reference clock signal. The phase alignment detector is configured to receive the indication of the relative phase difference and determine when the relative phase difference satisfies a preset threshold. The selection circuit is configured to transition from providing the first reference clock signal as a clock system reference signal to providing the second reference clock signal as the clock system reference signal responsive to the phase alignment detector detecting that the relative phase difference satisfies the preset threshold.