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:
Feb. 27, 2018
Filed:
Jun. 22, 2017
Applicant:
Cypress Semiconductor Corporation, San Jose, CA (US);
Inventors:
Yan Li, Morganville, NJ (US);
Wendy Yu, San Jose, CA (US);
Kamesh Medapalli, San Jose, CA (US);
Hongwei Kong, San Jose, CA (US);
Patrick Cruise, San Jose, CA (US);
Assignee:
Cypress Semiconductor Corporation, San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03D 3/00 (2006.01); H04L 27/156 (2006.01); H04L 27/148 (2006.01); H03L 7/081 (2006.01);
U.S. Cl.
CPC ...
H04L 27/1566 (2013.01); H04L 27/148 (2013.01); H03L 7/081 (2013.01);
Abstract
A frequency-shift keying (FSK) demodulator includes a digital phase-locked loop (DPLL) based frequency estimator to convert a phase signal to a frequency signal, a frequency offset estimator to estimate and track direct current (DC) component of the frequency signal, and an average filter communicatively coupled to the frequency offset estimator to perform an accumulate-and-dump operation to improve a symbol-level signal to noise ratio (SNR) of the frequency signal.