Invention Grant
- Patent Title: Enhanced and versatile N-way doherty power amplifier
- Patent Title (中): 增强型多功能N路多功能放大器
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Application No.: US14136981Application Date: 2013-12-20
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Publication No.: US09252722B2Publication Date: 2016-02-02
- Inventor: Bi Pham , Somsack Sychaleun
- Applicant: Telefonaktiebolaget L M Ericsson (publ)
- Applicant Address: SE Stockholm
- Assignee: Telefonaktiebolaget L M Ericsson (publ)
- Current Assignee: Telefonaktiebolaget L M Ericsson (publ)
- Current Assignee Address: SE Stockholm
- Agency: Murphy, Bilak & Homiller, PLLC
- Main IPC: H03F3/68
- IPC: H03F3/68 ; H03F1/56 ; H03F1/02 ; H03F1/48 ; H03F3/60 ; H03F3/21

Abstract:
The output of a carrier amplifier circuit in a Doherty amplifier is coupled to the summing node so that the impedance observed by the carrier amplifier's output is approximately equal to the load impedance at the combining node when the load impedance is not modulated. In an example non-inverting configuration, a power amplifier circuit is configured to provide an amplified signal to a load at a summing node, where the load has a first impedance when not load-modulated. The power amplifier circuit includes a splitter network arranged to receive the input signal and to split the input signal to provide a carrier input signal and a peaking input signal, a carrier amplifier path configured to amplify the carrier input signal in a full-power mode and in a first backoff mode, and a peaking amplifier path configured to amplify the peaking input signal in at least the full-power mode.
Public/Granted literature
- US20150180428A1 Enhanced and Versatile N-Way Doherty Power Amplifier Public/Granted day:2015-06-25
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