US 12,255,586 B2
Oscillator feedthrough calibration
Mohamed Abouzied, La Jolla, CA (US); Chuan Wang, San Diego, CA (US); Anosh Davierwalla, San Diego, CA (US); Muhammad Hassan, San Diego, CA (US); Vinod Panikkath, San Diego, CA (US); and Li Liu, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by Qualcomm Incorporated, San Diego, CA (US)
Filed on Nov. 30, 2022, as Appl. No. 18/060,295.
Prior Publication US 2024/0178795 A1, May 30, 2024
Int. Cl. H03D 7/14 (2006.01); H04B 17/21 (2015.01)
CPC H03D 7/1491 (2013.01) [H04B 17/21 (2015.01)] 24 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a mixer circuit comprising:
a first stage comprising at least one transistor coupled between a mixer input and a mixer output;
a second stage comprising one or more transistors coupled between the at least one transistor of the first stage and the mixer output, the one or more transistors coupled between a local oscillator signal input and the mixer output; and
tuning circuitry comprising at least one current source coupled to the at least one transistor of the first stage, wherein
the at least one transistor of the first stage comprises a gate terminal and a back-gate terminal;
the gate terminal of the at least one transistor corresponds to the mixer input; and
the at least one current source of the tuning circuitry is coupled to the back-gate terminal of the at least one transistor.