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:
Mar. 30, 2021
Filed:
Feb. 18, 2020
Qualcomm Incorporated, San Diego, CA (US);
Ravindraraj Ramaraju, Round Rock, TX (US);
Elhossin Abdelmonem Elshafey, Cork, IE;
Masoud Zamani, San Diego, CA (US);
Elham Zamanidoost, San Diego, CA (US);
QUALCOMM INCORPORATED, San Diego, CA (US);
Abstract
Certain aspects are directed to a time-to-digital converter (TDC) that allows for a more accurate jitter measurement. The TDC generally includes a ring oscillator (RO) having a plurality of taps and configured to generate a plurality of RO signals at the plurality of taps, a counter having an input coupled to an oscillating node, and at least two sampling circuits, each having an input coupled to an output of the counter. In certain aspects, the at least two sampling circuits are configured to sample a count signal at the output of the counter based on at least two of the plurality of RO signals at the plurality of taps.