US 12,294,398 B2
Estimating and correcting transmitter local oscillator leakage in loopback path
Sucheth Sureshbabu Kuncham, Bangalore (IN); Prakhar Agrawal, Bangalore (IN); and Rohit Chatterjee, Bangalore (IN)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Apr. 27, 2023, as Appl. No. 18/308,556.
Claims priority of application No. 202241036648 (IN), filed on Jun. 27, 2022.
Prior Publication US 2023/0421189 A1, Dec. 28, 2023
Int. Cl. H04B 1/10 (2006.01); H03D 7/12 (2006.01); H04L 27/38 (2006.01)
CPC H04B 1/109 (2013.01) [H03D 7/12 (2013.01); H04L 27/38 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system, comprising:
a receiver configured to receive a differential input signal from a quadrature amplitude modulation (QAM) transmitter at a differential interface that includes a first input and a second input;
a first switch coupled to the first input and a second switch coupled to the second input, wherein the first switch and second switch are configured to couple the first input and the second input to a complex mixer in a non-inverting configuration;
a third switch coupled to the first input and a fourth switch coupled to the second input, wherein the third switch and the fourth switch are configured to couple the first input and the second input to the complex mixer in an inverting configuration; and
wherein the complex mixer is configured to produce an output signal based on the non-inverting configuration and the inverting configuration.