Low-power consumption wireless receiver radio frequency front end circuit

Abstract

The invention relates to a low power consumption RF front-end circuit of the wireless receiver, belonging to the technical field of the integrated circuit of the RF wireless receiver, , comprising an RF input matching network, an amplifier stage, a bridge transformer, an LO switch stage, an IF load and a current source bias circuit; wherein, the RF input matching network implements the impedance matching between an antenna and the amplifier stage; the amplifier stage is used for amplifying the signal, the bridge transformer transfers the signal amplified to the LO switch stage and implements DC isolation between the front stage and back stage; the LO switch stage is used for implementing frequency mixing of the RF current signal and the LO signal and outputting alternatively the IF signalon an outputting differential load. Compared with the traditional RF front-end circuit, the circuit structure can use an on-chip integrated transformer or an on-chip inductor to implement inputting matching, and use the on-chip integrated transformer to implement the amplifying and downward frequency mixing of the RF signals perfectly, which simplifies the circuit structure. The circuit can be used in a low power supply voltage environment, and has the advantages of low DC power consumption, and less circuit noise and signal distortion.

Description

technical field [0001] The invention belongs to the technical field of radio frequency wireless receiver integrated circuits, and in particular relates to a radio frequency front-end circuit (RF Front-end) used in wireless receiver integrated circuits. It can be used for radio frequency signal receiver chips of technical standards such as broadband wireless network and high-speed wireless data transmission, such as WiMax and UWB. Background technique [0002] With the development of communication and semiconductor technology, various mobile communication systems and wireless data transmission technologies have developed rapidly. Representatives of them include GSM, CDMA, Bluetooth and WiFi, etc., especially in recent years 3G, IEEE802.11a / b / g , WiMax and UWB ultra-wideband technology and other high data rate wireless transmission technologies continue to emerge, which put forward high requirements for high-performance radio frequency signal receivers. Due to the high carrie...

AI Technical Summary

Problems solved by technology

The disadvantage of this is that the two parts of the circuit affect each other, and the design needs to go through the process of separate design, simulation to interconnection, joint simulation, and parameter modification, which increases the difficulty and cycle of design.

Difficulties in the design of the two-part circuit interface lead to insufficient optimization of the performance of the overall circuit such as power consumption, noise, and linearity

[0004] The RF input matching network of traditional broadband RF front-end circuits is generally composed of gate on-chip inductors, capacitors and their combined filter network, input common-source transistors, and source inductors. The number of on-chip inductors used is large and occupies a large chip area.

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