High sensitivity rf receiver and method for forming the same
AssigneeWindbond Electronics Corp.
InventorsLI-YUEH WANG, TAO-KEI LI
Life of this patent
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Abstract
A method for improving sensitivity of a RF receiver and a RF receiver designed by the same are provided. The RF receiver, which receives a RF signal, comprises a sampling converting circuit, a decoding circuit, a frequency-hopping circuit, a constant current source and a ring oscillating circuit. The RF receiver outputs a frequency-hopping signal to the frequency-hopping circuit when the decoding circuit determines that the digital data converted from the RF signal is not equivalent to each of the internal preset data. The frequency-hopping circuit outputs a frequency-hopping current to the ring oscillating circuit to change a sampling clock of the RF receiver.
Claims15
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.
A method for improving sensitivity of a radio-frequency (RF) receiver, the RF receiver generating a sampling frequency according to a constant current, the method comprising:
- receiving a RF signal;
- sampling the RF signal according to the sampling frequency, converting the RF signal into a digital data;
- determining whether the digital data is equivalent to any of internal preset data;
- generating a frequency-hopping signal to transmit a frequency-hopping current when the digital data is different from each of the preset data;
- and
- performing a frequency-hopping operation on the frequency-hopping current and the constant current, outputting a frequency-hopped sampling signal.
Dependencies are inferred from the claim text.