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:
Jun. 03, 2025
Filed:
Sep. 01, 2023
Montage Technology (Kunshan) Co., Ltd., Jiangsu, CN;
Zixin Wu, Suzhou, CN;
MONTAGE TECHNOLOGY (KUNSHAN) CO., LTD., Suzhou, CN;
Abstract
A duty cycle calibration circuit and method solves duty cycle calibration without single ended I/O signals. The calibration circuit includes driving circuit and voltage divider units, a low-pass filter, voltage controlled oscillator, digital processing unit, and duty cycle adjustment unit. The driving circuit unit outputs a clock signal for calibration; the voltage dividing unit divides voltage based on target duty cycle obtaining reference voltage; the low-pass filter performs low-pass filtering on the clock signal; the voltage controlled oscillator generates reference frequency corresponding to reference voltage and clock signal frequency corresponding to the clock signal based on reference voltage and filtered clock signal; the digital processing unit compares clock signal frequency with reference voltage frequency and generates a duty cycle adjustment control signal based on comparison result; and the duty cycle adjustment unit calibrates clock signal duty cycle based on the duty cycle adjustment control signal obtaining the target duty cycle.