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Envelope tracking amplifier circuit

An amplifier circuit, envelope tracking technology, applied in amplifiers, high-frequency amplifiers, radio frequency amplifiers, etc., can solve problems such as reducing the linearity and efficiency of envelope tracking systems

Pending Publication Date: 2020-01-07
QORVO US INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, envelope tracking systems can only maintain good linearity and high efficiency up to inherent bandwidth limitations
With the advent of fifth-generation new radio (5G-NR) technology, RF signals can be modulated at higher bandwidths (e.g., >100 MHz) than the inherent bandwidth limit of ET systems, reducing the ET system's Linearity and Efficiency

Method used

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Embodiment Construction

[0022] The embodiments set forth below represent the necessary information to enable one skilled in the art to practice the embodiments and demonstrate the best mode of practicing the embodiments. Upon reading the following description in light of the accompanying drawing figures, those skilled in the art will understand the concepts of the disclosure and will recognize applications of these concepts not particularly addressed herein. It should be understood that these concepts and applications are within the scope of this disclosure and the appended claims.

[0023] It will be understood that, although the terms first, second etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present disc...

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Abstract

An envelope tracking (ET) amplifier circuit is provided. The ET amplifier circuit includes an amplifier circuit configured to amplify a radio frequency (RF) signal based on an ET modulated voltage. The ET modulated voltage corresponds to a time-variant voltage envelope, which can be misaligned from a time-variant signal envelope of the RF signal due to inherent temporal delay in the ET amplifier circuit. As a result, the amplifier circuit may suffer degraded linearity performance. In this regard, a voltage processing circuit is provided in the ET amplifier circuit and configured to operate ina low-bandwidth mode and a high-bandwidth mode. In the high-bandwidth mode, the voltage processing circuit is configured to cause the ET modulated voltage to be modified to help improve delay tolerance of the ET amplifier circuit. As a result, it may be possible to reduce linearity degradation of the amplifier circuit to a predetermined threshold.

Description

[0001] related application [0002] This application claims the benefit of U.S. Provisional Patent Application Serial No. 62 / 691,454, filed June 28, 2018, which is hereby incorporated by reference in its entirety. technical field [0003] The techniques of this disclosure generally relate to envelope tracking (ET) power management in wireless communication devices. Background technique [0004] Mobile communication devices are becoming more and more common in today's society. The popularity of these mobile communication devices is driven in part by the many functions now enabled on such devices. Increased processing power in such devices means that mobile communication devices have evolved from pure communication tools to sophisticated mobile multimedia centers, enabling an enhanced user experience. [0005] A redefined user experience requires higher data rates provided by wireless communication technologies such as Long Term Evolution (LTE). To achieve higher data rates...

Claims

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Application Information

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IPC IPC(8): H03F1/32H03F1/30H03F3/19
CPCH03F1/30H03F1/3241H03F3/19H03F1/0227H03F3/245H03F2200/102H03F2200/451H03F2201/3215H03G3/3042H04B1/0483H04B2001/0425H03F1/02H03G3/3036H03G3/3089H03G2201/103H03G2201/307H04B1/04H04B2001/0416H04B2001/045
Inventor 纳迪姆·赫拉特詹姆斯·M·雷茨
Owner QORVO US INC