US 11,811,366 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 Jan. 4, 2022, as Appl. No. 17/568,316.
Application 17/568,316 is a continuation of application No. 16/607,079, granted, now 11,245,363, previously published as PCT/IB2017/000608, filed on Apr. 24, 2017.
Prior Publication US 2022/0131503 A1, Apr. 28, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H03F 1/07 (2006.01); 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 delay a transition from an off to an on state to within at least 6 dB of a power compression point of the main amplifier; and
a combining node coupled to an output port from the main amplifier and an output port from the two-stage peaking amplifier.