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Low noise amplifier circuit with high input dynamic range

A low-noise amplifier and dynamic range technology, applied to high-frequency amplifiers, improved amplifiers to reduce noise effects, etc., can solve the problems of not being able to obtain high-linearity low-noise amplifiers, and achieve superior comprehensive performance, large input dynamic range, and gain moderate effect

Inactive Publication Date: 2020-12-29
XIAN BORUI JIXIN ELECTRONICS TECH
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, in the RF receiving front-end, the low-noise amplifier accounts for about half of the power consumption of the front-end. Since low power consumption and high dynamics are a pair of contradictory combinations, it is impossible to obtain a low-noise amplifier with low power consumption and high linearity in conventional designs. amplifier

Method used

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  • Low noise amplifier circuit with high input dynamic range
  • Low noise amplifier circuit with high input dynamic range
  • Low noise amplifier circuit with high input dynamic range

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Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0021] It should be understood that terms such as "having", "comprising" and "including" as used herein do not entail the presence or addition of one or more other elements or combinations thereof.

[0022] The invention provides a low noise amplifier circuit with high input dynamic range, which includes a source dynamic feedback circuit, a feedback circuit and an amplification circuit. The radio frequency signal is input from the DC blocking capacitor C1, and is output by the DC blocking capacitor C3 after passing through the source dynamic feedback circuit and the amplification circuit with a common source structure configured by the feedback circuit.

[0023] The technical aspects of the present invention will be further described below in conjunction with the accompanying...

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Abstract

The invention discloses a low-noise amplifier circuit with a high input dynamic range. The low-noise amplifier circuit comprises a feedback circuit which comprises a resistor R1 and a capacitor C2, wherein the resistor R1 is connected with the capacitor C2; a source dynamic feedback circuit which comprises a transistor M2, a transistor M3 and a resistor R3; and an amplifying circuit which comprises a transistor M1, a resistor R2, inductors L1 and L2 and capacitors C2 and C3. Under the condition of guaranteeing a good noise coefficient, the gain is reduced while the power consumption is reduced, the output P1dB is improved, and the dynamic range is enlarged.

Description

technical field [0001] The invention belongs to the technical fields of microelectronics, semiconductor and communication, and relates to a low-noise amplifier circuit with high input dynamic range. Background technique [0002] The low noise amplifier is an important part of the RF receiving front end. As a key module of the RF receiving front end, its function is to amplify the weak signal received by the antenna and introduce as little local noise as possible. Its performance has a decisive influence on the performance of the overall receiver. Key performance indicators for LNAs include amplification gain, noise figure, linearity, and power consumption. A low noise amplifier not only needs to not add too much noise signal when receiving a signal, but also needs to maintain a high enough linearity when receiving a strong signal, which requires it to have a large enough input dynamic range. However, its power consumption will have a great impact on the gain, noise and lin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/189H03F1/26
CPCH03F3/189H03F1/26
Inventor 徐建辉杜琳孙向阳
Owner XIAN BORUI JIXIN ELECTRONICS TECH
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