US 11,888,448 B2
Low-load-modulation broadband amplifier
Bi Ngoc Pham, Oakville (CA); and Kelly Doherty, Chapel Hill, NC (US)
Assigned to MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC., Lowell, MA (US)
Filed by MACOM Technology Solutions Holdings, Inc., Lowell, MA (US)
Filed on Nov. 12, 2020, as Appl. No. 17/095,873.
Claims priority of provisional application 62/954,830, filed on Dec. 30, 2019.
Prior Publication US 2021/0203279 A1, Jul. 1, 2021
Int. Cl. H03F 1/02 (2006.01); H03F 1/42 (2006.01); H03F 3/21 (2006.01); H03F 1/56 (2006.01)
CPC H03F 1/0288 (2013.01) [H03F 1/42 (2013.01); H03F 3/211 (2013.01); H03F 1/565 (2013.01); H03F 2200/222 (2013.01); H03F 2200/36 (2013.01); H03F 2200/451 (2013.01)] 27 Claims
OG exemplary drawing
 
1. A power amplifier comprising:
a main amplifier coupled to a first combining node;
a first impedance inverter between the main amplifier and the first combining node;
a first peaking amplifier directly connected to the first combining node;
a second impedance inverter between the first combining node and a second combining node;
a second peaking amplifier coupled to the second combining node; and
a third impedance inverter between the second peaking amplifier and the second combining node, wherein:
the main amplifier outputs an amount of maximum power or current that differs by at least 20% from an amount of maximum power or current output by the first peaking amplifier and outputs the amount of maximum power or current that differs by at least 20% from an amount of maximum power or current output by the second peaking amplifier.