US 12,136,920 B2
Current-mode radio frequency attenuators
Rahul Singh, San Diego, CA (US); and Mehran Bakhshiani, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Mar. 1, 2022, as Appl. No. 17/652,961.
Prior Publication US 2023/0283268 A1, Sep. 7, 2023
Int. Cl. H01P 1/22 (2006.01); H03F 3/19 (2006.01); H03K 5/01 (2006.01)
CPC H03K 5/01 (2013.01) [H03F 3/19 (2013.01); H03F 2200/294 (2013.01); H03F 2200/451 (2013.01)] 25 Claims
OG exemplary drawing
 
1. An attenuator, comprising:
resistors coupled along a resistive path, wherein a first one of the resistors is coupled to an input of the attenuator; and
shunt circuits, wherein each one of the shunt circuits is coupled between a respective node on the resistive path and an output of the attenuator, and each one of the shunt circuits comprises:
a respective shunt resistor and a respective shunt switch coupled in series between the respective node on the resistive path and the output of the attenuator; and
a respective switchable resistor circuit coupled to a respective node between the respective shunt resistor and the respective shunt switch.