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Power amplifier

A technology of power amplifier and power amplifying unit, which is applied to power amplifiers, improving amplifiers to reduce the harmful effects of internal resistance, etc., can solve the problems of increasing the difficulty of layout design and the large layout area of ​​stacked power amplifiers, so as to reduce the difficulty of layout design. , avoid ohmic loss, improve the effect of output power

Active Publication Date: 2013-08-28
SUZHOU INNOTION TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

therefore, figure 1 and figure 2 The stacked power amplifier shown has a large layout area, which increases the difficulty of layout design

Method used

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Embodiment Construction

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0021] The invention discloses a power amplifier, which can reduce the layout area and reduce the difficulty of layout design.

[0022] The power amplifier includes an input matching circuit, an output matching circuit and a power amplifying unit. The power amplifying unit includes N transistors, and the N transistors are serially connected in series, and N is an integer greater than 1. Among the N transistors, the third terminal of one of the ...

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Abstract

The invention discloses a power amplifier which comprises an input match circuit, an output match circuit and a power amplifying unit. The power amplifying unit comprises N transistors, wherein the N transistors are connected sequentially in series and N is an integer larger than 1. The third end of a first transistor is connected to the input match circuit, the second end of the first transistor is connected to the ground, all second ends from the second end of a second transistor to the second end of a Nth transistor are connected with the first end of a transistor placed in a prior amplifier stage, all third ends from the third end of the second transistor to the third end of the Nth transistor are connected to corresponding power supplies through inductors, meanwhile, all the third ends from the third end of the second transistor to the third end of the Nth transistor are connected to the ground through capacitors and resistors, wherein the capacitors and the resistors are connected in series, and the output match circuit is connected with the first end of the Nth transistor. The power amplifier is small in occupied landscape area, can reduce landscape design difficulties and furthermore can prevent ohmic loss caused by the inductors, and therefore output power can be further improved.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a power amplifier. Background technique [0002] The power amplifier is a radio frequency front-end device in a wireless communication system, and its output power and linearity are directly related to the distance of wireless communication. At present, there are two commonly used methods to increase the output power of power amplifiers: one is parallel power combining, that is, the power units are connected in parallel, and the total output current is increased to increase the output power; the other is series power combining, that is, the power units are connected in series connected to increase the total output voltage to increase the output power. The power amplifier of series power combination is stacked power amplifier, and the optimal load required for output matching is relatively high, which is suitable for the design of broadband high-power amplifier ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/20
CPCH03F1/22
Inventor 高怀陈涛张晓东孙晓红田婷
Owner SUZHOU INNOTION TECH
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