Patent ID: 7155181

Claim:
A radio-frequency (RF) receiver for receiving a RF signal, the RF receiver comprising: a sampling converting circuit for receiving a RF signal to sample and outputting a digital data; a decoding circuit electrically coupled to the sampling converter circuit, receiving the digital signal and comparing the digital data with a plurality of internal preset data in the decoding circuit, when the digital data is different from each of the preset data, outputting a frequency-hopping signal; a frequency-hopping circuit coupled to the decoding circuit, electrically coupled to the decoding circuit for outputting a frequency-hopping current while receiving the frequency-hopping signal; a constant current source for outputting a constant current; and a ring oscillating circuit electrically coupled to the frequency-hopping circuit and the constant current source, while receiving the frequency-hopping current, performing a frequency-hopping operation on the frequency-hopping current and the constant current to generate a frequency-hopped sampling frequency.