US 12,381,515 B2
Symmetrical Doherty power amplifier having improved efficiency
Gerard Bouisse, Toulouse (FR)
Assigned to MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC., Lowell, MA (US)
Filed by MACOM Technology Solutions Holdings, Inc., Lowell, MA (US)
Filed on Aug. 15, 2023, as Appl. No. 18/449,963.
Application 18/449,963 is a continuation of application No. 17/568,316, filed on Jan. 4, 2022, granted, now 11,811,366.
Application 17/568,316 is a continuation of application No. 16/607,079, granted, now 11,245,363, issued on Feb. 8, 2022, previously published as PCT/IB2017/000608, filed on Apr. 24, 2017.
Prior Publication US 2024/0048103 A1, Feb. 8, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H03F 1/02 (2006.01); H03F 3/21 (2006.01)
CPC H03F 1/0288 (2013.01) [H03F 3/211 (2013.01); H03F 2200/387 (2013.01); H03F 2200/451 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A Doherty amplifier comprising:
an RF coupler;
a main amplifier coupled to a first port of the RF coupler;
a two-stage peaking amplifier coupled to a second port of the RF coupler, wherein the two-stage peaking amplifier is biased to transition the two-stage peaking amplifier from an off to an on state within 6 dB or less than a power compression point where the main amplifier begins to go into gain compression; and
a combining node coupled to an output port from the main amplifier and an output port from the two-stage peaking amplifier.