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Hybrid class amplifier

A power amplifier and transistor technology, applied in the field of amplifiers, can solve the problems of inability to achieve output power, breakdown, and efficiency drop.

Active Publication Date: 2015-07-08
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Depending on the transistor type, these high and low peaks can cause a drop in efficiency that prevents desired output power from being achieved, or cause catastrophic breakdown

Method used

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Embodiment Construction

[0042] For the following description of exemplary embodiments, reference is made to the accompanying drawings. The same reference numbers in different drawings identify the same or similar elements. The following detailed description does not limit the invention. Rather, the scope of the invention is defined by the appended claims. For simplicity, the following embodiments are discussed in relation to transistors with corresponding output circuits. However, the embodiments to be discussed next are not limited to this system, but can be applied to other systems.

[0043] Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" in various places in the specification are not necessarily referring to the same embodiment. F...

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Abstract

A power amplifier (10) configured to generate impedances at harmonic frequencies such that the power amplifier (10) operates in a class C mode in a low output amplitude range and in a class F or inverse F mode in a high output amplitude range.

Description

technical field [0001] The present invention relates generally to an amplifier capable of operating in different class modes, and more particularly to methods for configuring an amplifier to have selected characteristics of a Class C amplifier and selected characteristics of a Class F or inverting Class F amplifier mechanisms and techniques. Background technique [0002] The rapid development of mobile telecommunication services has led to an increasing demand for low cost, low power and reduced size and weight devices. One such device is found in transmitters in base stations and terminals for mobile telephony, as well as in transmitters for broadcast and other wireless systems. The transmitter uses a power amplifier to amplify the radio frequency (RF) signal to the antenna. In general, power amplifiers must be efficient, not overheat, require additional cooling, or draw less power to maximize battery life and reduce power costs. [0003] One aspect of amplifier efficien...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F3/217H03F1/02
CPCH03F3/19H03F3/16H03F1/56H03F3/217H03F1/0205
Inventor 里卡德·赫尔贝里
Owner TELEFON AB LM ERICSSON (PUBL)
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