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:
Dec. 23, 2025
Filed:
Jan. 19, 2024
Analog Devices, Inc., Wilmington, MA (US);
Brian Reggiannini, Norwood, MA (US);
Aleksey Kagan, Raleigh, NC (US);
Analog Devices, Inc., Wilmington, MA (US);
Abstract
A method of operating a radio frequency (RF) transceiver includes transmitting a narrowband calibration signal using a transmit channel of the RF transceiver, wherein a transmitted output signal includes a sideband of the calibration signal and a sideband of a digital-to-analog converter (DAC) image signal produced by DAC circuitry of the transmit channel; sampling the transmitted output signal using an analog-to-digital converter (ADC) circuit; filtering the transmitted output signal sampled by the ADC circuit to reduce power of the sideband of the calibration signal; attenuating DAC signals produced by the DAC circuitry to reduce power of the sideband of the DAC image signal; restoring the power of the sideband of the calibration signal sampled by the ADC circuit; and performing quadrature error correction (QEC) using the output of the ADC circuit.