Multi-mode power amplifiers

An amplifier, amplifier stage technology, applied in power amplifiers, amplifiers, gated amplifiers, etc., can solve problems such as low efficiency of power amplifiers

Active Publication Date: 2011-02-02
QUALCOMM INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For more common operating situations, high bias currents and/or volta

Method used

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  • Multi-mode power amplifiers
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Examples

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Embodiment Construction

[0021] The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any design described herein as "exemplary" need not be construed as being preferred or advantageous over other designs.

[0022] figure 1 A terminal 110 capable of communicating with multiple wireless communication systems of different radio technologies is shown. The terminal 110 may also be referred to as a mobile station, user equipment, access terminal, subscriber unit, station, etc. The terminal 110 may be a cellular phone, a personal digital assistant (PDA), a wireless communication device, a wireless modem, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, etc.

[0023] Generally speaking, the terminal 110 may be able to communicate with a CDMA system, a time division multiple access (TDMA) system, a frequency division multiple access (FDMA) system, an orthogonal frequency division multiple access (OFDMA) system, a single carrier...

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Abstract

Multi-mode power amplifiers that can support multiple radio technologies and/or multiple frequency bands are described. In one exemplary design, a first linear power amplifier supporting multiple radio technologies may be used to amplify a first RF input signal (e.g., for low band) and provide a first RF output signal. A second linear power amplifier also supporting the multiple radio technologies may be used to amplify a second RF input signal (e.g., for high band) and provide a second RF output signal. Each linear power amplifier may include multiple (e.g., three) chains coupled in parallel. Each chain may be selectable to amplify an RF input signal and provide an RF output signal for a respective range of output power levels. An RF input signal may be a phase modulated signal or a quadrature modulated signal and may be pre-distorted to account for non-linearity of the power amplifier.

Description

[0001] Claim priority according to 35U.S.C.§119 [0002] This patent application claims the priority of U.S. Provisional Application No. 61 / 027,351 filed on February 8, 2008, entitled "MULTI-MODE POWER AMPLIFIERS", which has been assigned to this case Assignee, and is expressly incorporated herein by reference. Technical field [0003] The present invention relates generally to electronic devices, and more specifically, to power amplifiers (PA). Background technique [0004] Power amplifiers are widely used in various wireless communication systems to provide amplification and output drive for radio frequency (RF) signals before air transmission. For example, power amplifiers are used in Global System for Mobile Communications (GSM) systems, Wideband Code Division Multiple Access (WCDMA) systems, and so on. Power amplifiers are also used in base stations and terminals. [0005] Power amplifiers usually need to meet various system specifications for spectrum shielding, emission time...

Claims

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Application Information

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IPC IPC(8): H03G3/00H03F3/21H03G1/00H03F3/72H03F1/02H03G3/30
CPCH03F2200/432H03F1/0244H03F1/3282H03F3/72H03F2203/7227H03G3/3042H03F2200/451H03F3/211H03F2203/7239H03F2200/429H03F1/0277H03F1/0261H03F2203/7206H03F2200/111H03F2203/7236
Inventor 普威·H·西伊理查德·席尔贝克二世
Owner QUALCOMM INC
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