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a low noise amplifier

A low-noise amplifier and amplifying circuit technology, applied in high-frequency amplifiers and other directions, can solve the problem of high power consumption, achieve the effect of low power consumption and increase circuit gain

Active Publication Date: 2019-06-28
SEMICON MFG INT (SHANGHAI) CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This design is also a two-stage amplification cascading method that requires two currents, so the power consumption is relatively high.

Method used

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Embodiment Construction

[0021] In the following description, a lot of specific details are given in order to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.

[0022] It should be understood that the present invention can be implemented in different forms and should not be construed as being limited to the embodiments presented here. On the contrary, the provision of these embodiments will make the disclosure thorough and complete, and will fully convey the scope of the present invention to those skilled in the art. In the drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity. The same reference numerals denote the same elements throughout.

[0023] The purpose of the terms used here i...

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Abstract

The invention provides a low noise amplifier. The low-noise amplifier includes: a bias circuit; a first-stage amplifying circuit, the first-stage amplifying circuit is a common-source common-gate structure; a second-stage amplifying circuit, the second-stage amplifying circuit communicates with the first-stage through a first capacitor The amplification is connected in series, one end of the bias circuit is connected to the second-stage amplifying circuit; and a matching network, one end of the matching network is connected to the bias network, and the other end of the matching network is connected to the connected to the first amplifier described above. The low noise amplifier can provide high gain, low noise, and low power consumption performance.

Description

Technical field [0001] The present invention relates to the field of electronic circuits, in particular to a low noise amplifier. Background technique [0002] RF transceivers are widely used in vehicle monitoring, remote control, telemetry, small wireless networks, wireless meter reading, access control systems, community paging, industrial data acquisition systems, wireless tags, small wireless data terminals, safety and fire protection systems, wireless remote control systems, In the fields of biological signal acquisition, hydrometeorological monitoring, data communication, digital audio, digital image transmission, etc. [0003] The low-noise amplifier is the first-stage circuit of the radio frequency receiver. Its function is to amplify the radio frequency signal under the premise of producing the lowest possible noise to reduce the influence of the noise generated by the subsequent stages of the module on the signal. [0004] The usual method for increasing the gain of the lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F3/189
CPCH03F3/189H03F1/223H03F3/211H03F2200/451H03F2200/294H03F3/195
Inventor 朱红卫陆皆晟
Owner SEMICON MFG INT (SHANGHAI) CORP