Electric amplifier based on frequency detection

An amplifier and operational amplifier technology, applied in the direction of amplifiers, improving amplifiers to reduce the influence of noise, electrical components, etc., can solve the problems of large noise energy, unfavorable frequency detection, and low signal-to-noise ratio, so as to reduce the difficulty of data processing and improve the The effect of detection ability

Inactive Publication Date: 2018-02-16
11TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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Problems solved by technology

However, such an electrical signal is too weak and needs to be amplified and output by an electrical amplifier.
Using ordinary amplifiers, the signal energy is mainly concentrated at the low noise frequency. The noise energy in this freq

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  • Electric amplifier based on frequency detection
  • Electric amplifier based on frequency detection
  • Electric amplifier based on frequency detection

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[0026] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0027] In order to reduce the noise introduced by the amplifier and reduce the difficulty of signal extraction and processing, the present invention provides an electric amplifier based on frequency detection. The present invention will be further described in detail below in conjunction with the drawings. It should be understood that the specific embodiments described here are only used to explain the prese...

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Abstract

The invention provides an electric amplifier based on frequency detection. The electric amplifier comprises an LC feedback resonant structure, an operational amplifier and an LC balancing structure, wherein the operational amplifier comprises an inverting input end, a non-inverting input end and a balanced output end, two ends of the LC feedback resonant structure are separately connected with theinverting input end and the balanced output end, and a negative feedback network is formed between the inverting input end and the balanced output end; the LC balancing structure is connected with the non-inverting input end; the LC feedback resonant structure is used to select signals with a specific frequency from received signals; the operational amplifier is used to provide transconductance gains for the signals with the specific frequency; and the LC balancing structure is used to perform balance matching on bias currents of the non-inverting input end and the inverting input end. According to the electric amplifier based on frequency detection provided by the invention, the frequency of the selected current signals is in in a low-noise frequency band of the amplifier.

Description

technical field [0001] The invention relates to the field of amplifiers, in particular to an electric amplifier based on frequency detection. Background technique [0002] In photodetection experiments, the detection of optical signals is to convert optical signals into electrical signals. However, such an electrical signal is too weak and needs to be amplified and output by an electrical amplifier. Using ordinary amplifiers, the signal energy is mainly concentrated at the low noise frequency. The noise energy in this frequency band is large, and the signal-to-noise ratio of the signal in this frequency band is low. In the actual experiment process, it is not good for frequency detection, which increases the difficulty of signal extraction and processing. Contents of the invention [0003] In order to reduce the noise introduced by the amplifier and reduce the difficulty of signal extraction and processing, the invention provides an electric amplifier based on frequency d...

Claims

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Application Information

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IPC IPC(8): H03F1/26
CPCH03F1/26H03F2200/372
Inventor 眭晓林周寿桓刘波吴姿妍曹昌东颜子恒赵娟莹
Owner 11TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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