US 11,658,689 B2
T-switch with shunt for improved receiver sensitivity
Vahid Dabbagh Rezaei, San Diego, CA (US); Ahmed Abbas Mohamed Helmy, San Diego, CA (US); and Prakash Thoppay Egambaram, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on May 21, 2021, as Appl. No. 17/327,285.
Claims priority of provisional application 63/045,787, filed on Jun. 29, 2020.
Prior Publication US 2021/0409040 A1, Dec. 30, 2021
Int. Cl. H04B 1/00 (2006.01); H03K 3/2885 (2006.01)
CPC H04B 1/006 (2013.01) [H03K 3/2885 (2013.01)] 38 Claims
OG exemplary drawing
 
1. A wireless communication apparatus comprising:
a first differential switch having a first input and a second input, a first output and a second output, and a control input;
a second differential switch having a first input and a second input coupled to the respective first and second output of the first differential switch, the second differential switch further having a first output and a second output, and a control input;
a shunt capacitor coupled between the first output and the second output of the first differential switch, the shunt capacitor further coupled between the first input and the second input of the second differential switch;
a first shunt switch having a control input, an input, and an output, the input and the output coupled to the control input of the first differential switch; and
a second shunt switch having a control input, an input, and an output, the input and the output coupled to the control input of the second differential switch.