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Amplifier device

A technology for amplifiers and amplifying units, which is applied to amplifiers, components of amplifying devices, high-frequency amplifiers, etc., and can solve problems such as nonlinearity, complex circuit design, circuit complexity, and cost increase

Active Publication Date: 2018-07-10
RICHWAVE TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Nowadays, mobile devices are popular, and the number of amplifier devices used in communication modules is also increasing. However, the power-gain curve and power-phase curve of the amplifier device will show a nonlinear trend when the power increases to a certain level. Therefore, Limiting use of amplifier devices on power limitations
Although it is possible to reduce the power or add a pre-distortion circuit, the circuit complexity and cost also increase accordingly
In addition, the linearity of the amplifier device will also change according to the input signal, voltage source or temperature. If a pre-distortion circuit is added as mentioned above, different control factors need to be considered, and the circuit design will be more complicated.

Method used

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Embodiment Construction

[0057] Various exemplary embodiments will be described more fully hereinafter with reference to the accompanying drawings, in which some exemplary embodiments are shown. Inventive concepts may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the inventive concept to those skilled in the art. Throughout the drawings of the specification, like numerals indicate like components.

[0058] It should be understood that although the terms first, second, third, etc. may be used in the present invention to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another. Similarly, the qualifiers similar to "a" appearing in this article do not refer to a limitation on quantity, but des...

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Abstract

The invention provides an amplifier device, and the amplifier device includes an amplifying unit, a bias module and an impedance unit. A first end of the amplifying unit electronically connects to a voltage source. A second end of the amplifying unit receives an input signal. The first end of the amplifying unit outputs an output signal amplified by the amplifying unit. A third end of the amplifying unit connects to a first reference potential. The bias module electrically connects to the second end of the amplifying unit for providing a bias voltage to the amplifying unit. An impedance unit is electrically connects to the bias module. An impedance value of the impedance unit is variable. The bias module adjusts the amplifier's linearity according to a frequency value of the input signal,a voltage value of the voltage source or a temperature value of the amplifier device. The impedance is adjusted according to the above-mentioned values.

Description

technical field [0001] The present invention relates to an amplifier device, and in particular to an amplifier device capable of improving linearity. Background technique [0002] Nowadays, mobile devices are popular, and the number of amplifier devices used in communication modules is also increasing. However, the power-gain curve and power-phase curve of the amplifier device will show a nonlinear trend when the power increases to a certain level. Therefore, Limits the power usage of the amplifier device. Although it can be achieved by reducing the power or adding a pre-distortion circuit, the circuit complexity and cost also increase accordingly. In addition, the linearity of the amplifier device will also change according to the input signal, voltage source or temperature. If a pre-distortion circuit is added as mentioned above, different control factors need to be considered, and the circuit design becomes more complicated. [0003] Therefore, providing an amplifier de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/30H03F3/68
CPCH03F1/30H03F1/32H03F1/56H03F3/213H03F3/68H03F1/0261H03F1/302H03F3/193H03F3/45183H03F3/45475H03F2200/18H03F3/21H03F2200/555H03F2200/294H03F2200/451H03F1/0216H03F3/19
Inventor 陈智圣罗弘家
Owner RICHWAVE TECH CORP