Broadband low-noise amplifier adopting current multiplexing and voltage combining

Abstract

The invention discloses a broadband low-noise amplifier adopting current multiplexing and voltage combining. The broadband low-noise amplifier comprises a first input-stage amplifying circuit, a firstoutput-stage amplifying circuit, a second input-stage amplifying circuit and a second output-stage amplifying circuit; each stage of amplifying circuit comprises a common-source amplifier formed by an MOS (Metal Oxide Semiconductor) tube; the input end of the first input-stage amplifying circuit is connected with the radio frequency signal input end, the output end of the first input-stage amplifying circuit is divided into two paths, one path is coupled with the second input-stage amplifying circuit through an inductor, and the other path is connected with the input end of the first output-stage amplifying circuit; the output end of the second input-stage amplification circuit is connected with the input end of the second output-stage amplification circuit through an inductance capacitor; the first output-stage amplification circuit and the second output-stage amplification circuit are connected through inductive coupling and then are coupled to a radio-frequency signal output end through capacitors respectively. Through combination of current multiplexing and voltage combination, low noise, ultra wide band, low power consumption and large gain performance are realized.

Description

technical field [0001] The invention relates to the technical field of communication, and more specifically relates to a broadband low-noise amplifier adopting current multiplexing and voltage combining. Background technique [0002] In broadband wireless communication, as the frequency becomes higher and higher, the requirements for radio frequency bandwidth are also higher and higher. For example, for 5G NR, the frequency of the 28G frequency band is 24.25G-29.5GHz, and the relative bandwidth is close to 20%; For 802.11ay, its specified bandwidth is 57G-71G, and the relative bandwidth reaches 22%; for UWB system, its frequency band is located at 3-10GHz. For higher frequencies, such as mmWave imaging, the requirements for RF bandwidth accuracy and resolution mean higher. It can be seen that the bandwidth of the radio frequency signal plays an increasingly important role in a specific system. [0003] With the progress of the current chip processing technology, the speed ...

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Problems solved by technology

[0003] With the progress of the current chip processing technology, the speed of the chip is getting faster and faster, but the price is that its operating voltage is getting lower and lower. For radio frequency circuits, if the voltage swing is greatly limited, its dynamic range will be affected. limited

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