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:
Aug. 10, 2021
Filed:
Feb. 03, 2021
SK Hynix Inc., Icheon, KR;
Seoul National University R&db Foundation, Seoul, KR;
SK hynix Inc., Icheon, KR;
Seoul National University R&DB Foundation, Icheon, KR;
Abstract
A calibration circuit includes an oscillator configured to generate an oscillation signal according to a control voltage; a counter configured to generate a count value according to the oscillation signal; and a control circuit configured to control a pull-up driver and a pull-down driver commonly coupled to an output node according to the count value, wherein the control circuit compares a reference count value of the counter by providing a reference voltage as the control voltage for a unit control period with a count value of the counter by providing an output voltage of the output node as the control voltage for a unit control period, and controls a pull-up control signal that adjusts turn-on impedance of the pull-up driver and a pull-down control signal that adjusts turn-on impedance of the pull-down driver.