US 11,656,254 B2
Power detector including squaring circuits
Abdellatif Bellaouar, Richardson, TX (US); Arul Balasubramaniyan, Plano, TX (US); Gurkanwal Singh Sahota, San Diego, CA (US); Muhammad Hassan, San Diego, CA (US); Jorge Garcia, San Diego, CA (US); Bhushan Shanti Asuri, San Diego, CA (US); Ravi Sridhara, San Diego, CA (US); Omar Essam El-Aassar, La Jolla, CA (US); and Chinmaya Mishra, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Jul. 17, 2020, as Appl. No. 16/932,589.
Prior Publication US 2022/0018882 A1, Jan. 20, 2022
Int. Cl. G01R 21/10 (2006.01); G01R 21/133 (2006.01); H03F 3/45 (2006.01); H03M 1/12 (2006.01)
CPC G01R 21/10 (2013.01) [G01R 21/133 (2013.01); H03F 3/45475 (2013.01); H03F 2200/171 (2013.01); H03F 2200/294 (2013.01); H03F 2200/451 (2013.01); H03M 1/12 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a resistive element including a first terminal and a second terminal, wherein the resistive element is coupled between a power amplifier and an antenna;
a first squaring circuit including an input and an output;
a first attenuator coupled between the first terminal of the resistive element and the input of the first squaring circuit;
a second squaring circuit including an input and an output;
a second attenuator coupled between the second terminal of the resistive element and the input of the second squaring circuit; and
a difference circuit coupled to the output of the first squaring circuit and the output of the second squaring circuit.