US 11,658,690 B2
Transceiver droop calibration
Muhammad Hassan, San Diego, CA (US); and Jeremy Darren Dunworth, La Jolla, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Jul. 21, 2021, as Appl. No. 17/443,136.
Prior Publication US 2023/0024839 A1, Jan. 26, 2023
Int. Cl. H04B 1/40 (2015.01); H04B 1/04 (2006.01); H04B 17/12 (2015.01)
CPC H04B 1/04 (2013.01) [H04B 1/40 (2013.01); H04B 17/12 (2015.01)] 27 Claims
OG exemplary drawing
 
1. A transmitter, comprising:
a transmit chain including at least one amplifier;
a first mixer configured to mix an intermediate frequency signal and a local oscillator signal to form a radio frequency data signal at an input of the transmit chain;
a signal multiplier configured to mix the local oscillator signal with a frequency-translated version of the local oscillator signal to form an RF calibration signal; and
a second mixer configured to mix the RF calibration signal with a DC offset to form a mixed RF calibration signal at the input of the transmit chain.