LOW-VOLTAGE POWER-EFFICIENT ENVELOPE TRACKER

Title:

LOW-VOLTAGE POWER-EFFICIENT ENVELOPE TRACKER

Document Type and Number:

Japanese Patent JP2015216670

Kind Code:

A

Abstract:

PROBLEM TO BE SOLVED: To provide a power amplifier which provides high RF output power and has high power-added efficiency even with a low battery voltage.SOLUTION: An apparatus includes an envelope amplifier 170a, a boost converter 180, and a power amplifier 130. The boost converter 180 generates a boosted supply voltage Vboost having a higher voltage than a first supply voltage (e.g., a battery voltage Vbat). The envelope amplifier 170a generates a second supply voltage Vpa on the basis of an envelope signal and the boosted supply voltage Vboost (optionally the first supply voltage Vbat). A power amplifier 130 operates on the basis of the second supply voltage Vpa.

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Inventors:

LENNART K MATHE
THOMAS DOMENICK MARRA
TODD R SUTTON

Application Number:

JP2015131268A

Publication Date:

December 03, 2015

Filing Date:

June 30, 2015

Export Citation:

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Assignee:

QUALCOMM INC

International Classes:

H03F1/02; H03F3/24

Domestic Patent References:

JP2001519612A	2001-10-23
JP2008042917A	2008-02-21
JP2005102146A	2005-04-14
JP2003533116A	2003-11-05
JP2001519612A	2001-10-23

Foreign References:

US20080157895A1	2008-07-03
US20100171553A1	2010-07-08
WO2010089971A1	2010-08-12
US20080157895A1	2008-07-03
US20100171553A1	2010-07-08

Attorney, Agent or Firm:

Kurata Masatoshi
Yoshihiro Fukuhara
Morisezo Iseki
Okumura Motohiro

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