The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 15, 2016
Filed:
May. 22, 2014
Applicant:
Ampleon Netherlands B.v., Nijmegen, NL;
Inventor:
Jawad Qureshi, Bemmel, NL;
Assignee:
Ampleon Netherlands B.V., Nijmegen, NL;
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/68 (2006.01); H03F 3/24 (2006.01); H03F 3/195 (2006.01); H03F 3/193 (2006.01); H03F 1/02 (2006.01); H03F 1/07 (2006.01);
U.S. Cl.
CPC ...
H03F 3/68 (2013.01); H03F 1/07 (2013.01); H03F 3/193 (2013.01); H03F 3/195 (2013.01); H03F 3/245 (2013.01); H03F 2200/255 (2013.01); H03F 2200/423 (2013.01); H03F 2200/451 (2013.01);
Abstract
A Doherty amplifier has different drain voltages applied to the power transistors of the main and peaking stages. The impedance inverter comprises at least one first series phase shifting element between the output of the main amplifier and the Doherty amplifier output and at least one second series phase shifting element between the output of the peaking amplifier and the Doherty amplifier output. This provides a wideband combiner. The combination of this wideband combiner and different drain drive levels provides an improved combination of efficiency and bandwidth.