Radio frequency signal receiving device

Abstract

The invention relates to a radio frequency signal receiving device. The device comprises a first multi-phase filter, a second multi-phase filter, a first frequency mixing module, a switch and a low-pass filter module, wherein the first multi-phase filter receives a radio frequency input signal and generates a plurality of filtered radio frequency signals based on the signal; the first frequency mixing module is used for mixing frequency according to a frequency reduction signal and the filtered radio frequency signals so as to generate a plurality of frequency reduction radio frequency signals; the switch receives the frequency reduction radio frequency signals and transmits the frequency reduction radio frequency signals to a first channel or a second channel according to a selection signal; the second multi-phase filter receives the frequency reduction radio frequency signal transmitted by the second channel for filtering; and the low-pass filter module receives the filtered frequency reduction radio frequency signals or the frequency reduction radio frequency signal transmitted by the first channel to perform low-pass filtering, so that a low medium frequency signal or a zero medium frequency signal is generated. The radio frequency signal receiving device provided by the invention can simultaneously provide three different radio frequency signal receiving modes.

Description

technical field [0001] The invention relates to a radio frequency signal receiving device. Background technique [0002] In today's technology, radio frequency signal receivers applied in a System ON Chip (SOC) can generally be divided into two types. One of them is a so-called direct conversion receiver architecture, and the other is a so-called low intermediate frequency receiver architecture. These two RF signal receiver architectures each have different advantages and disadvantages. Usually, designers will choose the corresponding architecture according to different applications or different considerations. [0003] The following uses the direct conversion radio frequency signal receiver architecture as an example to illustrate. figure 1 It is a schematic diagram of a conventional radio frequency signal receiver 100 . Please refer to figure 1 , the radio frequency signal receiver 100 includes a low noise amplifier 110 , low pass filters 121 , 122 , mixers 131 , 132 ...

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Problems solved by technology

In this way, the circuit area on the chip is wasted, and the cost of the chip is also increased.

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