Wireless receiver

Abstract

The present invention provides a wireless receiver with the multi-channel or the single-channel. The present invention is utilizing a pre-selector to pre-choose the signal within the category of the frequency band. Then, according to the different channel code to choose the corresponding local oscillation frequency, the present invention utilizes a frequency down converter referring to the local oscillation frequency to sequentially performing the frequency down step and the filtering step to obtain a low frequency signal. Then, a low pass filter is used to perform the filtering step of the low frequency signal, a limiter is used to amplify the signal, and a frequency discriminator is used to demodulate the signal so as to obtain a base-band signal. The present invention can simplify the complexity of the apparatus and quickly change the channel to achieve the effect of multi-channel receiving to achieve the purpose of the application of receiving the signal of the multi-channel and the single channel. The present invention can also provide with the advantage of the high ability of the anti-interference.

Dependencies are inferred from the claim text.