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Power amplifier

A technology for power amplifier and signal amplifying, applied in power amplifier and other directions, can solve the problem of fixed output spectrum of class D power amplifier, and achieve the effect of improving utilization efficiency

Active Publication Date: 2013-01-30
SHANGHAI INTEGRATED CIRCUIT RES & DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Compared with other power amplifiers, the advantage of Class D power amplifiers is their high efficiency, but the output spectrum of ordinary Class D power amplifiers is fixed.

Method used

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Embodiment Construction

[0018] In order to make the content of the present invention clearer and easier to understand, the content of the present invention will be further described below in conjunction with the accompanying drawings. Of course, the present invention is not limited to this specific embodiment, and general replacements known to those skilled in the art are also covered within the protection scope of the present invention.

[0019] Please refer to figure 1 , which shows a schematic structural diagram of a power amplifier according to an embodiment of the present invention.

[0020] The power amplifier of the present invention is applied to the transmitter of the wireless sensor network, and is used for matching and amplifying the signal through the antenna, so as to wirelessly transmit the digital or analog signal through the transmitter antenna. Since the wireless sensor network system usually adopts the on-off keying (OOK) modulation method, the linearity requirement of the power am...

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Abstract

The invention discloses a power amplifier. The power amplifier comprises a first-stage unit and a second-stage unit, wherein the first-stage unit comprises a plurality of phase inverter groups connected in sequence, wherein the output end of each phase inverter group is connected with the output end of the first-stage unit, a first control switch is arranged between the adjacent phase inverters, a second control switch is arranged between each phase inverter group and the output end of the first-stage unit, the first control switches and the second control switches switch the work states of the plurality of phase inverter groups so as to output different frequencies of square signals; and the second-stage unit is coupled with the output end of the first-stage unit and used for reshaping the square signals sent by the first-stage unit to generate amplifying signals. According to the power amplifier, a transmitter can transmit according to powers with different frequency spectrums.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a frequency-variable power amplifier. Background technique [0002] With the rapid development of modern science and technology, the most important and basic sensor network technology for information acquisition has also been greatly developed. Sensor information acquisition technology has gradually developed from simplification in the past to integration, miniaturization, networking and intelligence. Combining cutting-edge technologies in various fields and using modern wireless communication connection means, a kind of information integration and processing capabilities and interactive wireless The emerging sensor technology of communication——wireless sensor network came into being as the times require. The wireless sensor network can cooperate with each other through various integrated micro-sensors and monitor, perceive and collect information of various environments and m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/20
Inventor 李琛
Owner SHANGHAI INTEGRATED CIRCUIT RES & DEV CENT
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