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. 15, 2020
Filed:
Jul. 10, 2019
Realtek Semiconductor Corporation, Hsinchu, TW;
REALTEK SEMICONDUCTOR CORPORATION, Hsinchu, TW;
Abstract
Disclosed is a clock generating circuit capable of operating in an analog clock data recovery (ACDR) mode to reduce the loop latency or a clock multiplication unit (CMU) mode to suppress reference jitter. The circuit includes a filter and an oscillator. The filter receives an input signal to determine voltages of a first node and a second node respectively and includes a first filtering circuit and a second filtering circuit coupled in parallel between the first node and a reference voltage terminal. The second filtering circuit includes a switch and a capacitor connected in series, wherein the second node is between the switch and capacitor, and the switch is turned off in the ACDR mode and turned on in the CMU mode. The oscillator outputs a clock according to the first node's voltage in the ACDR mode or according to the second node's voltage in the CMU mode.