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:
Dec. 10, 2019
Filed:
Aug. 10, 2018
Texas Instruments Incorporated, Dallas, TX (US);
Jayawardan Janardhanan, Issaquah, WA (US);
Christopher Andrew Schell, Tacoma, WA (US);
Henry Yao, Santa Clara, CA (US);
Raghu Ganesan, Bengaluru, IN;
TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US);
Abstract
A phase-locked loop circuit includes a first time-to-digital converter (TDC) to receive an input reference signal, a digital-controlled oscillator (DCO), and a first divider coupled to an output of the DCO. The first divider divides down a frequency of an output from the DCO. A second divider divides down a frequency of an output form the first divider to provide a second divider output to an input of the first TDC. The first TDC generates an output digital value encoding a time difference between corresponding edges of the input reference signal and the second divider output. A second TDC receives the input reference signal. An averager circuit generates a digital output that is indicative of an average of an output from the second TDC. A subtractor circuit subtracts the digital output from the average and the output digital value from the first TDC.