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Power amplifier bias current monitor and control mechanism

A bias current and amplifier technology, which is applied in the direction of amplifiers, high-frequency amplifiers, components of amplifiers, etc., and can solve problems such as amplifier output power shift, failure, and impact on amplifier performance.

Active Publication Date: 2015-05-20
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the bias current can deviate from the target bias current, and the deviation can adversely affect the performance of the amplifier
For example, lower or higher bias currents can cause the amplifier's output power to shift, which can be undesirable

Method used

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  • Power amplifier bias current monitor and control mechanism
  • Power amplifier bias current monitor and control mechanism
  • Power amplifier bias current monitor and control mechanism

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Embodiment Construction

[0017] The detailed description set forth below is intended as a description of an exemplary design of the present invention, and is not intended to represent the only design that can practice the present invention. The term "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any design described as "exemplary" herein should not necessarily be construed as preferred or advantageous over other designs. The detailed description includes specific details for the purpose of providing a thorough understanding of the exemplary design of the present invention. It will be obvious to those skilled in the art that the exemplary design described herein can be practiced without these specific details. In some examples, well-known structures and devices are shown in block diagram form to avoid obscuring the novelty of the exemplary designs presented herein.

[0018] This article describes techniques for monitoring and controlling the bias current of the am...

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PUM

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Abstract

Techniques for monitoring and controlling bias current of amplifiers are described. In an exemplary design, an apparatus may include an amplifier and a bias circuit. The amplifier may include at least one transistor coupled to an inductor. The bias circuit may generate at least one bias voltage for the at least one transistor in the amplifier to obtain a target bias current for the amplifier. The bias circuit may generate the at least one bias voltage based on a voltage across the inductor in the amplifier, or a current through a current mirror formed with one of the at least one transistor in the amplifier, or a gate-to-source voltage of one of the at least one transistor in the amplifier, or a voltage in a replica circuit replicating the amplifier, or a current applied to the amplifier with a switched mode power supply disabled.

Description

[0001] Information about divisional application [0002] The application number is PCT / US2010 / 044033, the filing date is July 30, 2010, the priority date is July 30, 2009, and the title of the invention is "Bias current monitor and control mechanism for amplifiers" After the PCT application entered the national phase, it was a divisional application of the Chinese invention patent application with the application number 201080033302.9. [0003] Claim priority based on 35U.S.C.§119 [0004] This patent application claims the priority of the U.S. Provisional Application No. 61 / 230,089 filed on July 30, 2009, entitled "POWER AMPLIFIER BIAS CURRENT MONITOR AND CONTROL MECHANISM" , The US provisional application has been assigned to the assignee and is expressly incorporated herein by reference. Technical field [0005] The present invention relates generally to electronic devices, and more specifically, to bias circuits for amplifiers. Background technique [0006] Amplifiers are common...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/30H03F3/189
CPCH03F1/30H03F1/301H03F3/189H03F3/04
Inventor 托马斯·D·马拉阿里斯托泰莱·哈奇克里斯托斯内森·M·普莱彻
Owner QUALCOMM INC