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Linear low noise amplifying device of time division duplex system

A time-division duplex system and low-noise amplification technology, which is applied in time-division multiplexing systems, selection devices, high-frequency amplifiers, etc., to achieve the effects of reducing input levels, reducing leakage signal levels, and improving sensitivity

Inactive Publication Date: 2008-11-05
ZTE CORP
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem that in the prior art low-noise amplifying devices need to use multi-stage RF transceiver switches connected in series to improve the isolation of system transceivers, and propose a linear low-noise amplifier for time-division duplex systems device, in order to reduce the requirements on the system’s transceiver isolation, no need to use multi-stage RF transceiver switches connected in series

Method used

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  • Linear low noise amplifying device of time division duplex system
  • Linear low noise amplifying device of time division duplex system
  • Linear low noise amplifying device of time division duplex system

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Embodiment Construction

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0016] figure 1 It is a structural schematic diagram of the linear low-noise amplification device proposed by the present invention. Such as figure 1 As shown, the linear low noise amplification device proposed by the present invention includes a linear low noise amplification module 101 , a radio frequency switch 102 and a power management control circuit 103 . The radio frequency switch 102 is used to switch the transceiver channel, and its main function is to complete the time slot conversion of the transceiver channel according to the needs of the system so that the TDD linear switch low noise amplifier can complete the time division duplex function. The linear low-noise amplification module 101 mainly performs linear low-noise amplification on the radio frequency signal, so that the amplified level and signal-to-noise ratio of the input...

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Abstract

The amplifying device includes linear amplification module in low noise, radio frequency switch and circuit for managing and controlling power source. With being controlled by baseband control signal, circuit for managing and controlling power source outputs signal to make linear amplification module in low noise turn on / off. When time division duplexing system is in receiving state, baseband control signal controls radio frequency switch to on, and controls the circuit for managing and controlling power source to output signal making linear amplification module turn on. When time division duplexing system is in transmitting state, radio frequency switch is off, and linear amplification module is turned off. The invented amplifying device reduces requirement for separation between receiving and transmitting, as well as raises sensitivity of system and lowers consumption of system.

Description

technical field [0001] The invention relates to a low-noise amplifying device, in particular to a linear low-noise amplifying device used in a time-division duplex system. Background technique [0002] Microwave linear low noise amplifiers are becoming more and more important in modern microwave communication systems. Especially in the mobile communication system of various communication systems, the linear low noise amplifier has become an essential and important component. With the continuous development of modern mobile communication technology, the transmission distance of the communication system is getting farther and farther, and at the same time, the transition from the analog system to the digital system is continuous, which puts higher and higher requirements on the noise figure and dynamics of the low noise amplifier. Require. [0003] The main function of the low-noise amplifier is to amplify the small signal of the front stage, so that the output signal can no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/00H04Q7/30H04Q7/20H03F3/189H04B7/005
Inventor 余敏德杨云涛邱炜
Owner ZTE CORP
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