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Ultra-wide-band low-noise amplifier adopting inductance compensation technology

A low-noise amplifier and ultra-wideband technology, which is applied in the direction of improving the amplifier to expand the bandwidth, improving the amplifier to reduce the impact of noise, and electrical components. It can solve the problems of reducing noise performance and using multiple inductors to achieve a flat noise figure and reduce Power Consumption, Effect of Flat Gain

Active Publication Date: 2014-01-22
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

Because the amplifier uses a resistor negative feedback structure, there is a serious mutual constraint between gain and input matching, especially in deep submicron CMOS technology, this structure can only provide a small gain, thus requiring the use of multiple stages for amplification, which uses multiple inductors and degrades noise performance

Method used

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  • Ultra-wide-band low-noise amplifier adopting inductance compensation technology
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  • Ultra-wide-band low-noise amplifier adopting inductance compensation technology

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Embodiment Construction

[0029] The low noise amplifier solution proposed by the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

[0030] Such as figure 2 As shown, the low noise amplifier proposed by the present invention includes an amplifying unit 1, a feedback unit 2 and an output matching unit 3, wherein the amplifying unit 1 receives a radio frequency input signal and amplifies it, and simultaneously inputs the amplified signal to the feedback unit 2 and the output matching unit 3. The input terminal of the output matching unit 3; the feedback unit 2 feeds back the signal to the input terminal of the radio frequency signal to form a good input matching; the output matching unit 3 directly receives the amplified signal to drive the load.

[0031] Specifically, such as image 3As shown, the amplifying unit 1 is composed of NMOS transistor M1, PMOS transistors M2 and M3, resistor R1, capacitor C3 and indu...

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Abstract

An ultra-wide-band low-noise amplifier adopting the inductance compensation technology comprises an amplification unit, a feedback unit and an output matching unit, wherein the output end of the amplification unit is directly connected with the input end of the feedback unit and the output matching unit, and the output end of the feedback unit is connected with the input end of the amplification unit. The amplification unit adopts a self-biased phase inverter structure, the bias resistance is large so that the input resistance of the amplification unit can be very large, and input matching is not affected. According to the feedback unit, a source follower drives a medium resistor to finish input matching. The output matching unit adopts a source follower structure and can keep good output matching within a wide frequency band. The amplification unit adopts the split load inductance compensation technology, and an inductor is connected with the grid end of an MOS pipe in series. The 3dB band width of the low-noise amplifier is largely improved, the low-noise amplifier can keep smooth grains within a wide frequency band, and meanwhile the compensating inductance has a certain inhibiting effect on noise.

Description

technical field [0001] The invention belongs to the technical field of radio frequency integrated circuits, and specifically relates to an ultra-wideband low-noise amplifier with flat gain, low noise, and good input matching, which is suitable for multi-band amplifiers of 0.5G to 10.6GHz including GSM, WCDMA, Bluetooth, WLAN, and UWB. Modular receiver front end. Background technique [0002] With the rapid increase in market demand for multifunctional wireless devices, multi-mode radio frequency receiving systems have become a research hotspot in both academic and industrial circles. By integrating multiple different communication modes into a single receive chain, the chip area and power consumption of the whole machine can be reduced at the same time. [0003] The low-noise amplifier is an important module in the radio frequency receiving chain. It receives the weak signal from the antenna and amplifies it to the subsequent module. In order to ensure the performance of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/26H03F1/42H04B1/16
Inventor 黄东刁盛锡林福江
Owner UNIV OF SCI & TECH OF CHINA
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