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, 2026
Filed:
Aug. 05, 2021
Analog Devices International Unlimited Company, Limerick, IE;
Brian Reggiannini, Norwood, MA (US);
Gordon Allan, Ottawa, CA;
Hatice Ozis Unsal, Raleigh, NC (US);
Christopher Mayer, Dover, MA (US);
Richard Schubert, Medfield, MA (US);
Jianxun Fan, Cary, NC (US);
Lu Wu, Summerfield, NC (US);
Tolga Pamir, Ottawa, CA;
Antonio Montalvo, Raleigh, NC (US);
Ahmed Ali, Oak Ridge, NC (US);
David Mclaurin, Raleigh, NC (US);
ANALOG DEVICES INTERNATIONAL UNLIMITED COMPANY, Limerick, IE;
Abstract
Apparatus and methods for transceivers are provided herein. In a first aspect, an observation receiver is implemented to detect common-mode local oscillator (LO) leakage while the observation receiver performs other functions. In a second aspect, a transceiver is implemented with an LO leakage compensation circuit that compensates a transmitter for LO leakage using a digital filter, such as a Kalman filter, that combines differential LO leakage observations with common-mode LO leakage observations. In a third aspect, a transmitter includes multiple local loopback paths including a first loopback path after a variable gain amplifier (VGA) and a second loopback path before the VGA.