RF receiving circuit and RF receiver

Abstract

The invention relates to the technical field of communication, in particular to an RF receiving circuit and an RF receiver. The RF receiving circuit comprises a tail current source, a clock signal input unit, a sampling and holding unit and a load unit, wherein the tail current source is multiplexed to access an RF signal and amplify the RF signal, so as to generate an RF current; the clock signalinput unit is connected with the tail current source, and is used for inputting a clock signal; the sampling and holding unit is connected with the clock signal input unit, and outputs an orthogonalsignal with the frequency being one-half clock frequency; the load unit is connected with the sampling and holding unit, the RF current flowing through the load unit is converted into a voltage and modulated by means of the orthogonal signal, and the load unit outputs an IF signal with the frequency being a difference of the RF signal frequency and the orthogonal signal frequency, thereby realizing frequency mixing. The RF receiving circuit achieves the traditional orthogonal signal generation function, can amplify and mix the input RF signal, and realizes the multiplexing of adivide-by-2 frequency dividing circuit.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a radio frequency receiving circuit and a radio frequency receiver. Background technique [0002] With the rapid development of modern communication systems, the communication industry has become an industry with a wide market audience, and the application of communication systems has penetrated into every corner of society. The RF receiver has also been widely used as a basic module in the communication system, and its performance (including power consumption / area / noise figure and linearity) improvement and potential development has also become a continuous and challenging research focus. [0003] In mobile communication, in order to prolong the standby time, reducing the power consumption of the receiver has always been a research hotspot. The traditional structure of the receiver, including low noise amplifier (LNA) / mixer (Mixer) / quadrature local oscilla...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a radio frequency receiving circuit, which realizes the amplification and mixing functions of radio frequency signals by multiplexing the SCL divider by two, and aims to solve the problems of large output power consumption and large chip area in the traditional technical solution The problem

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