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:
May. 06, 2025
Filed:
Dec. 29, 2022
Open Silicon, Inc., Milpitas, CA (US);
Alphawave Semi, Inc., Milpitas, CA (US);
Abstract
Systems and methods are disclosed for differential clock duty cycle correction. For example, a method includes converting an input rail-to-rail differential clock signal to a low-swing differential signal; fixing a DC bias level of the low-swing differential signal; changing DC bias levels of ends of the low-swing differential signal in a complementary manner to change cross-over points of the low-swing differential signal; and inputting the low-swing differential signal to a level shifter and buffer to generate a duty-corrected rail-to-rail digital differential clock signal. For example, an apparatus may include a differential pair of CMOS transmission-gate switches as clock input switches; complementary differential pairs of transistors with gate terminals connected to a differential control voltage signal; and/or extra current sources for independently controlling the DC bias voltages of ends of a differential clock signal.