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Sampling feedback control low-noise amplifier

A low-noise amplifier and feedback control technology, applied in the direction of improving the amplifier to reduce the influence of noise, etc., can solve the problem that the output gain of the CDMA low-noise amplifier cannot be adjusted in real time, and achieve the effect of extending the output range

Inactive Publication Date: 2016-05-18
黄磊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical defect that the output gain of the CDMA low noise amplifier cannot be adjusted in real time in the prior art, the present invention provides a sampling feedback control low noise amplifier

Method used

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  • Sampling feedback control low-noise amplifier

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Embodiment Construction

[0014] A specific embodiment of the present invention is given below.

[0015] The sampling feedback control low noise amplifier comprises an input amplification stage and an attenuation stage, and a third amplifier connected with the attenuation stage, the output of the third amplifier is connected with an output isolator, and also includes a wave detector and a digital signal processing unit, so The input end of the detector is connected with the output end of the third amplifier, the output end of the detector is connected with the digital signal processing unit, and the digital signal processing unit is connected with the attenuation stage control.

[0016] Preferably, the attenuation stage includes a digitally controlled attenuator and a voltage-controlled attenuator connected to the digital signal processing unit.

[0017] Preferably, the output isolator is an active signal isolator.

[0018] Preferably, the input amplifier stage includes an input isolator, a first ampl...

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Abstract

Provided is a sampling feedback control low-noise amplifier, including an input amplifier stage and an attenuation stage, and a third amplifier connected with the attenuation stage. The output end of the third amplifier is connected with an output isolator. The low-noise amplifier also comprises a detector and a digital signal processing unit. The input end of the detector is connected with the output end of the third amplifier. The output end of the detector is connected with the digital signal processing unit. The digital signal processing unit is connected with the attenuation stage in a controlled manner. The sampling feedback control low-noise amplifier samples signals through the detector, and the signals are input to a MCU, so as to control the attenuation coefficient of the attenuation stage, and adjust output gain in real time, and output range is expanded, and the amplifier can be applied in wider wave bands.

Description

technical field [0001] The invention belongs to the field of electronic communication and relates to a sampling feedback control low noise amplifier. Background technique [0002] Mobile communication technology is the product of the highly developed and mutual integration of modern communication technology and computer technology. With the wide application of digital information technology, modern communication technology is developing at an unprecedented high speed, and mobile communication is also developing along the direction of multi-access communication. Compared with FDMA (Frequency Division Multiple Access) and TDMA (Time Division Multiple Access), CDMA (Code Division Multiple Access) has the advantages of large system capacity, flexible configuration, high spectrum utilization rate, soft handover, and good security performance. Based on these advantages, CDMA technology has been widely used. [0003] As the first stage of CDMA receiver, CDMA low noise amplifier d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/26
Inventor 黄磊
Owner 黄磊