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Radio frequency receiver and radio frequency transmitter

A technology of radio frequency receivers and transmitters, applied in transmission systems, electrical components, etc.

Active Publication Date: 2010-02-03
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this need cannot be met by providing a device with multiple radio transceivers, which can only be adapted for one communication protocol

Method used

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  • Radio frequency receiver and radio frequency transmitter
  • Radio frequency receiver and radio frequency transmitter
  • Radio frequency receiver and radio frequency transmitter

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Embodiment Construction

[0027] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the preferred embodiments are listed below, together with the accompanying drawings, and are described in detail as follows:

[0028] Figure 2A A radio frequency (RF: radio frequency) receiver according to an embodiment of the present invention is shown. The RF receiver includes first and second low noise amplifiers (LNA: low noise amplifier) ​​202 and 210 , a local oscillator module 212 , a switch 214 and first, second and third mixers 204 , 206 and 208 . The first LNA 202 amplifies the first RF signal. The first mixer 204 is coupled to the first LNA 202 . The local oscillator module 212 generates first, second and third local oscillator signals LO 1 , LO 2 I / LO I and LO 2Q / LO Q , wherein the phase difference between the second local oscillation signal and the third local oscillation signal is about 90 degrees. According to an embodiment of the...

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PUM

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Abstract

A radio-frequency receiver and a radio-frequency transmitter. The radio-frequency receiver includes a first and second low noise amplifier (LNA), a local oscillating module, and a first, second, and third mixer. The first LNA amplifies a first RF signal. The local oscillating module generates a first, second and third local oscillating signals. The first local oscillating signal is generated according to the second local oscillating signal. The first mixer mixes the first RF signal with the first local oscillating signal to generate an intermediate frequency signal. The second LNA amplifies asecond RF signal. The second and third mixers can be operated in two modes. The second and third mixers mix the intermediate frequency signal to generate a first and second baseband signal respectively in the first mode, and the second and third mixers mix the second RF signal with the second and third oscillating frequency respectively in a second mode.

Description

technical field [0001] The present invention relates to a wireless communication system, in particular to a broadband wireless communication system, in particular to a radio frequency receiver and a radio frequency transmitter. Background technique [0002] The development of communication technology makes wireless communication more and more common. Efforts are currently being made to replace the connections between clients, servers, etc., and network cables with wireless communications. Examples of implementing wireless networking technologies include the IEEE 802.11 specification, 802.11a, 802.11b, and 802.11g, among others. [0003] In some application systems it is desirable that devices can operate on different wireless communication protocols. However, this need cannot be met by providing a device with multiple radio transceivers, which can only be adapted for one communication protocol. Sharing the core components of the communication device is a commonly used met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/22H04B1/38H04B1/40
CPCH04B1/0096
Inventor 吴家欣
Owner MEDIATEK INC