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:
Apr. 21, 2026
Filed:
Mar. 18, 2024
Cadence Design Systems, Inc., San Jose, CA (US);
Shaojun MA, San Jose, CA (US);
Didem Zeliha Turker Melek, San Jose, CA (US);
Stephen Thomas Williams, Woodbine, MD (US);
Cadence Design Systems, Inc., San Jose, CA (US);
Abstract
Embodiments included herein are directed towards a phase-locked loop (PLL) circuit. Embodiments may include a phase frequency detector circuit configured to receive an input signal. Embodiments may further include a charge pump circuit configured to receive an output signal from the phase frequency detector circuit. The charge pump circuit may source or sink charge for a controlled amount of time based upon, at least in part, the output signal from the phase frequency detector circuit. The charge pump circuit may generate a current based upon, at least in part, a bandgap voltage, a switched capacitor resistor, and a frequency reference source. Embodiments may include a loop filter circuit configured to receive the current from the charge pump circuit and a voltage-controlled oscillator circuit configured to receive the current from the charge pump circuit. Embodiments may further include a feedback divider circuit operatively connected with the voltage-controlled oscillator circuit.