Radio frequency circuit shared by transmitting and receiving matching networks based on on-chip transformer

An on-chip transformer and transmission path technology, applied in the field of radio frequency communication, can solve problems such as affecting circuit performance, increasing PCB board size, and increasing costs

Inactive Publication Date: 2014-03-26
BEIJING CEC HUADA ELECTRONIC DESIGN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These components will occupy a large area of ​​the PCB board, which will increase the size of the PCB board and the ground of the RF circuit, which will not only affect the performance of the circuit, but also increase the cost.

Method used

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  • Radio frequency circuit shared by transmitting and receiving matching networks based on on-chip transformer
  • Radio frequency circuit shared by transmitting and receiving matching networks based on on-chip transformer
  • Radio frequency circuit shared by transmitting and receiving matching networks based on on-chip transformer

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Embodiment Construction

[0021] In the transceiver structure, the multiplexing technology of the circuit module can save the area of ​​the chip and effectively reduce the cost; at the same time, the highly integrated chip can reduce the number of components outside the chip, and can also show a great advantage in terms of cost. The invention improves the structure of the transceiver from multiplexing and on-chip integration.

[0022] Transceiver structure of the present invention such as image 3 shown. The function of T / R-SWITCH is controlled by switches SW1 and SW2. When SW1 is closed and SW2 is opened, the transmitter path is open. At this time, the output port of the PA is connected to the primary coil L1 of the transformer through SW1, the variable capacitor array C2 is connected between the input port of L1 and the ground, and the variable capacitor array C3 is connected between the input port of L2 and the ground , by adjusting the size of C2 and C3, select the frequency band of PA work, and...

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Abstract

The invention provides a transceiver structure which integrates TR-SW and is shared by transmitting and receiving matching networks based on an on-chip transformer. The transceiver is used in a wireless communication radio frequency front-end circuit. The transceiver structure is based on the on-chip transformer, and integrates circuit original parts which are difficultly integrated, such as the impedance matching networks of a transmitter and a receiver, TR_SWITCH and the like, on a chip, thus the chip integration is greatly improved, and the cost is reduced. According to the invention, the on-chip impedance networks of the receiver and the transmitter are shared; a switch is used to control the alternate conduction of the transmitter and the receiver; the number of the original parts of the impedance matching networks on the chip is reduced; and the chip area is reduced.

Description

technical field [0001] The invention relates to a highly integrated transceiver structure in a radio frequency front-end circuit, belonging to the field of radio frequency communication. Background technique [0002] In recent decades, wireless communication has been greatly developed. On the one hand, this is due to the fact that wireless communication can make people's lives more convenient, and mobile terminals can maintain information exchange at any time, with high real-time performance; Terminals are also taking on more and more functions. Products with high cost performance have always been supported and welcomed by users, which puts forward higher requirements for hardware designers: reduce costs. [0003] The types of integrated circuits can be divided into analog circuits (including radio frequency circuits) and digital circuits. The complexity of digital circuits is very different. Generally, digital chips with low requirements will use large-scale technology t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/44
Inventor 孙志刚李罗生
Owner BEIJING CEC HUADA ELECTRONIC DESIGN CO LTD
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