System and method for stabilizing amplifier

A technology for amplifiers and power amplifiers, applied to power amplifiers, improved amplifiers to reduce nonlinear distortion, etc., can solve problems such as output signal nonlinear distortion

Active Publication Date: 2015-01-28
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] In view of the shortcomings of the prior art described above, the object of the present invention is to provide a system and method for stabilizing the amplifier, which is used to solve the problem of nonlinear distortion of the output signal caused by the memory effect of the power amplifier in the prior art

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  • System and method for stabilizing amplifier
  • System and method for stabilizing amplifier

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Embodiment Construction

[0055] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0056] see Figure 1 ~ Figure 4. It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of ​​the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arbit...

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Abstract

The invention provides a system for stabilizing an amplifier. The system comprises a processor for modeling for the power amplifier, a digital analog converter for performing digital-to-analog conversion on an output signal of the processor, the power amplifier for amplifying an input signal, and an acquisition circuit for acquiring an output signal of the power amplifier. The invention also provides a method for stabilizing the amplifier; the method comprises the steps of generating the input signal, acquiring the output signal, modeling for the power amplifier according to the input signal and the acquired output signal, determining the order and the memory depth of a polynomial in a model to obtain a predistortion model, and updating the predistortion model according to the work mode of the power amplifier. According to the system and the method, the memory effect of a pulse type input signal to the power amplifier is considered, the memory polynomial is used for modeling for the power amplifier, a memory polynomial structure based on a lookup table is provided, and the degree of linearity is greatly improved.

Description

technical field [0001] The invention relates to the technical field of nuclear magnetic resonance radio frequency amplifiers, in particular to a system and method for stabilizing amplifiers. Background technique [0002] Nuclear Magnetic Resonance (NMR, Nuclear Magnetic Resonance) is a physical phenomenon, which is widely used in physics, chemical biology and other fields as an analysis method. It was used in medical clinical detection in 1973, and it was called nuclear magnetic resonance imaging. [0003] Nuclear Magnetic Resonance is a biomagnetic spin imaging technology. It utilizes the characteristics of atomic nucleus spin motion to first let the object to be measured enter the magnetic field for magnetization, and then emit a series of radio frequency pulse signals of a specific frequency. The hydrogen nucleus of the object to be measured Resonance is generated under the excitation of radio frequency signals, and energy is absorbed to cause magnetic moment deflection. ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/32H03F3/20
Inventor 胡贤龙钱砾
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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