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:
Nov. 20, 2018
Filed:
Sep. 20, 2017
Qualcomm Incorporated, San Diego, CA (US);
Alireza Khalili, Sunnyvale, CA (US);
Amir Ziabasharhagh, Campbell, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
An integrated circuit is disclosed that implements a phase-locked loop with charge scaling. In an example aspect, the integrated circuit includes a charge pump, a filter, and a charge manager. The charge pump generates a current signal, and the filter includes a filter capacitor. The charge manager is coupled between the charge pump and the filter. The charge manager includes current-sampling capacitance circuitry and a charge manager controller that is coupled to the current-sampling capacitance circuitry. The current-sampling capacitance circuitry receives the current signal from the charge pump and retains charge from the current signal to create stored charge, with the stored charge including a first charge portion and a second charge portion. The charge manager controller causes the current-sampling capacitance circuitry to communicate the first charge portion to the filter capacitor and causes the current-sampling capacitance circuitry to divert the second charge portion away from the filter capacitor.