Single chip radio frequency transceiver

Abstract

A radio frequency transceiver of single chip includes a radio frequency receiving part, a radio frequency sending part, a local oscillation part, a reference voltage source and a current bias part. A low noise amplifier, a mixer and a intermediate frequency amplifier possessed by the radio frequency receiving part, an automatic gain regulator adjusting the gain of the radio frequency receiving part according to the intension of the received signal, a power adjuster and a buffer amplifier of a delivered power possessed by the radio frequency sending part, a voltage controlled oscillator, a frequency synthesizer and a crystal oscillator possessed by the local oscillation part, the reference voltage source and the current bias part are integrated to the single chip. The single chip has an input end and an output end of the received signal, which are connected with the receiving part, a filtering end connected with a filter at the outside, an input end and an output end of a signal to be emitted, which are connected with an emission part and a clock signal output end, a signal control end and an oscillation signal input end which are connected with the local oscillation part. In this way, the integration of the radio frequency transceiver is improved greatly.

Description

Technical field [0001] The invention relates to the technical field of wireless transceivers, in particular to a single-chip radio frequency transceiver. Background technique [0002] A radio frequency transceiver is a device used in a wireless communication system to modulate a baseband signal to a carrier and convert the carrier signal to a baseband. In the traditional walkie-talkie system design, in the RF front-end, the receiver generally adopts a superheterodyne structure, while the transmitter uses an audio signal to directly modulate a voltage-controlled oscillator (VCO). [0003] In the receiver system, the selection of the intermediate frequency must take into account the image rejection and the selection of the intermediate frequency filter, as well as the power consumption requirements. The general approach is to suppress the image frequency band before the first mixing, mainly by using various high-performance filters. But the filter itself has insertion loss, and the...

AI Technical Summary

Problems solved by technology

[0014] Because the radio frequency transceiver involves many circuit components and the circuit is complex, the integration of the existing radio frequency transceiver is low, and it is difficult to adapt to the development of the existing large-scale integrated circuit technology. Therefore, how to improve the integration of the radio frequency transceiver and reduce the radio frequency transceiver The number of discrete components of the device has become a technical problem to be solved urgently by those skilled in the art

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