Broadband Low Noise Amplifier

A broadband low-noise, amplifier technology, applied in the direction of amplification control, improving the amplifier to reduce noise impact, electrical components, etc., can solve the problems of deteriorating the noise performance of broadband amplifiers and the inability to achieve simultaneous optimization, so as to avoid the use of radio frequency inductors, Effect of good broadband impedance matching performance, noise performance and bandwidth performance optimization
CN103281038BActive Publication Date: 2016-02-03SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
Publication Date
2016-02-03

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Abstract

The invention relates to semiconductor devices, and discloses a wideband low noise amplifier. The wideband low noise amplifier utilizes a cross coupling transistor network as a wideband impedance matching network, can achieve characteristics similar to pure resistance in a wide frequency band, is simple in circuit structure, and achieves good wideband impedance matching performance on the premise that noise is not eliminated, namely achieves simultaneous optimization of noise performance and wideband performance. Compared with a traditional low noise amplifier, the wideband low noise amplifier avoids a radio frequency inductor, largely lowers the size of a chip, and can reduce the size of the chip by more than 80%.
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Description

technical field

[0001] The present invention relates to semiconductor devices, in particular to broadband low noise amplifiers. Background technique

[0002] Low-noise amplifiers generally refer to amplifiers with low noise figures, which are generally used as high-frequency or intermediate-frequency preamplifiers for various radio receivers, and amplifying circuits for high-sensitivity electronic detection equipment. It is usually used as the first stage of this type of electronic equipment. In the case of amplifying weak signals, the noise of the amplifier itself may seriously interfere with the signal. Therefore, it is hoped to reduce this noise to improve the signal-to-noise ratio of the output. Therefore, its noise performance largely determines the sensitivity of the overall system.

[0003] However, in addition to noise performance, its other technical index, high-frequency impedance matching characteristics, cannot be ignored. In high frequencies, especially radio ...

Claims

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