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. 23, 2020
Filed:
Mar. 21, 2019
Applicant:
Apple Inc., Cupertino, CA (US);
Inventor:
Cristian Marcu, San Jose, CA (US);
Assignee:
Apple Inc., Cupertino, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/06 (2006.01); H03L 7/08 (2006.01); H03L 7/099 (2006.01); H03L 7/10 (2006.01); H03F 3/45 (2006.01);
U.S. Cl.
CPC ...
H03L 7/102 (2013.01); H03F 3/45071 (2013.01); H03L 7/099 (2013.01); H03L 7/104 (2013.01);
Abstract
An oscillator subsystem included in a phase-locked loop circuit of a computer system may include coarse and fine-tuning circuits. The coarse-tuning circuit may generate a coarse-tuning current based on a reference voltage, and the fine-tuning circuit may generate a fine-tuning current by combining respective currents generated by first and second complement current mirror circuits using a voltage level of a control signal. An oscillator circuit may generate a clock signal whose frequency is based on a combination of the coarse and fine-tuning circuits.