Radio frequency transceiver chip, and synchronization system and method for radio frequency transceiver chip

A radio frequency transceiver chip, radio frequency signal technology, applied in transmission systems, synchronization devices, synchronization receivers, etc., can solve the problems of difficult phase alignment of the local oscillator network, large scale of the local oscillator network, low precision, etc. The effect of reduced sampling performance, convenience and versatility, and high precision

CN111245472AActive Publication Date: 2020-06-05杭州城芯科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-06-05

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Abstract

The invention relates to a radio frequency transceiver chip and a synchronization system and method for the radio frequency transceiver chip. The radio frequency transceiver chip comprises a mixer, ananalog-to-digital converter, a receiving local oscillator, a transmitting local oscillator, a digital-to-analog converter and a digital unit. A receiving link is a zero intermediate frequency architecture and is composed of the mixer and the analog-to-digital converter, and the receiving local oscillator is a fractional frequency synthesizer; a transmitting link is a radio frequency direct acquisition architecture and is composed of the digital-to-analog converter, and the transmitting local oscillator is an integer frequency synthesizer; and inputs of the decimal frequency synthesizer and the integer frequency synthesizer are a reference clock and a synchronization signal. During multi-chip synchronization, integer frequency synthesizer synchronization of the transmitting link is firstlycarried out, and then fractional frequency synthesizer synchronization of the receiving link is carried out. The fractional frequency synthesis synchronization comprises synchronization of a fractional frequency division module and synchronization of a multimode frequency division module. The system and the method are suitable for a large-scale phased array, do not need an external high-frequencylocal oscillator signal, and effectively reduce the power consumption of a multi-chip synchronous clock network.
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Description

technical field

[0001] The invention relates to the technical field of integrated circuits, in particular to a radio frequency transceiver chip, and a synchronization system and method for the radio frequency transceiver chip. Background technique

[0002] The role of the radio frequency transceiver chip is to pass the radio frequency signal to the baseband for subsequent signal processing after amplification, filtering and analog-to-digital conversion, which determines the communication quality of radio frequency communication. The receiving chain of the RF transceiver chip usually includes a low-noise amplifier, a down-mixer, a filter, and an analog-to-digital converter; the transmitting chain usually includes multiple units such as a digital-to-analog converter, a filter, and an up-mixer.

[0003] In recent years, with the development of phased array communication requirements such as 5G mobile communication, RF transceiver chips are required to have the ability to work s...

Examples

Embodiment Construction

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] Such as figure 1 As shown, a radio frequency transceiver chip provided by an embodiment of the present invention includes a mixer, an analog-to-digital converter, a receiving local oscillator, a transmitting local oscillator, a digital-to-analog converter, and a digital unit, wherein:

[0029] The receiving link of the RF transceiver ...