US 11,888,453 B2
Wideband low-noise amplifier
Alaaeldien Mohamed Abdelrazek Medra, San Diego, CA (US); and Francesco Gatta, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Mar. 23, 2021, as Appl. No. 17/210,416.
Prior Publication US 2022/0311391 A1, Sep. 29, 2022
Int. Cl. H03F 1/22 (2006.01); H03F 3/19 (2006.01)
CPC H03F 3/19 (2013.01) [H03F 2200/294 (2013.01); H03F 2200/372 (2013.01); H03F 2200/534 (2013.01); H03F 2200/541 (2013.01)] 30 Claims
OG exemplary drawing
 
1. An amplifier, comprising:
an input transformer including a first coil, a second coil, and a third coil, the second coil being coupled to an input node configured to receive an input signal;
a first transconductance transistor having a gate coupled to the input node through the second coil and having a source coupled to the third coil;
an output transistor;
an output transformer including a fourth coil coupled to a source of the output transistor; a fifth coil coupled to a gate of the output transistor; and a sixth coil coupled to a drain of the output transistor; and
a first cascode transistor coupled between a drain of the first transconductance transistor and the fourth coil.