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:
Mar. 19, 2013
Filed:
Nov. 01, 2011
Yoon Ha Jeong, Pohang-si, KR;
Sang Ho Kam, Gimhae-si, KR;
Yong Sub Lee, Pohang-si, KR;
Mun Woo Lee, Daegu-si, KR;
Yoon Ha Jeong, Pohang-si, KR;
Sang Ho Kam, Gimhae-si, KR;
Yong Sub Lee, Pohang-si, KR;
Mun Woo Lee, Daegu-si, KR;
Postech Academy-Industry Foundation, Pohang-Si, Gyeongsangbuk-Do, KR;
Abstract
Disclosed is a 3-way Doherty power amplifier using a driving amplifier in which driving amplifiers are connected to the front stages of a carrier amplifier and a peaking amplifier, respectively, so as to obtain a high gain and a high efficiency. To this end, the Doherty power amplifier includes: a hybrid power distributor for distributing an input signal into first and second path units; and a driving amplifier for receiving a signal outputted from the hybrid power distributor and controlling the driving of a carrier amplifier, a first peaking amplifier, and a second peaking amplifier, wherein: the carrier amplifier, the first peaking amplifier, and the second peaking amplifier are connected to a rear stage of the driving amplifier, respectively; the first path unit generates a high efficiency at a low input power; and the second path unit maintains a high efficiency and gain in a high output range.