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:
Feb. 18, 2025
Filed:
May. 02, 2022
Applicant:
Apple Inc., Cupertino, CA (US);
Inventors:
Milad Darvishi, San Diego, CA (US);
Georgios Palaskas, San Diego, CA (US);
Assignee:
Apple Inc., Cupertino, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/56 (2006.01); H03H 7/01 (2006.01); H04B 1/04 (2006.01);
U.S. Cl.
CPC ...
G05F 1/56 (2013.01); H03H 7/0115 (2013.01); H04B 1/04 (2013.01);
Abstract
An electronic device may include wireless circuitry having digital-to-analog converters, filters, mixers, and current buffers disposed between the filters and the mixers. The current buffers may provide proper resistance termination for the filters. The current buffers may include current mirrors formed from diode-connected n-type transistors and diode-connected p-type transistors, which collectively provide a linear input resistance. The current mirrors may receive a high voltage from a voltage regulator having a replica current mirror and proportional-to-absolute-temperature current sources.