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:
Sep. 19, 2023
Filed:
Dec. 16, 2020
Nordic Semiconductor Asa, Trondheim, NO;
Bartosz Gajda, Trondheim, NO;
Frode Pedersen, Trondheim, NO;
Nordic Semiconductor ASA, Trondheim, NO;
Abstract
A clock selector circuit receives a first input clock signal (CLK) having a first frequency, and a second input clock signal (CLK) having a second frequency. A phase difference detector is configured to detect when a phase difference occurs, over time, between the first input clock signal (CLK) and the second input clock signal (CLK), determined using when a clock edge crosses zero, and to signal this zero crossing to switching circuitry. The switching circuitry is configured, in response to receiving a zero-crossing signal from the phase difference detector, to detect an edge of opposite type to the predetermined type in the first input clock signal (CLK) or in the second input clock signal (CLK), and, in response to detecting said edge of opposite type, to switch an output clock signal (CLK_OUT) between the first input clock signal (CLK) and the second input clock signal (CLK).