Receiver and semiconductor device
AssigneeRenesas Electronics Corporation
InventorsTatsuya URAKAWA, Noriaki Matsuno
Life of this patent
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Abstract
A receiver includes an automatic gain control (AGC) loop and a filter group that is arranged downstream of the AGC loop. The filter group includes an active filter. The receiver further includes a power difference detector and a switch circuit. The power difference detector detects a power difference between intermediate and output nodes of the filter group to detect presence of an interference wave that is different from a desired wave and that has a frequency near that of the desired wave. The switch circuit switches an operation to suppress a convergence power of the AGC loop when the power difference detector detects the interference wave.
Claims20
A receiver comprising:
- an automatic gain control (AGC) loop;
- a filter group that is arranged downstream of the AGC loop and that includes an active filter;
- a power difference detector that detects a power difference between intermediate and output nodes of the filter group to detect presence of an interference wave that is different from a desired wave and that has a frequency near that of the desired wave;
- and
- a switch circuit that switches an operation to suppress a convergence power of the AGC loop when the power difference detector detects the interference wave.
A semiconductor device comprising:
- a semiconductor substrate;
- and
- a receiver fabricated on the semiconductor substrate,
- wherein the receiver comprises:
- an automatic gain control (AGC) loop;
- a filter group that is arranged downstream of the AGC loop and that includes an active filter;
- a power difference detector that detects a power difference between intermediate and output nodes of the filter group to detect presence of an interference wave that is different from a desired wave and that has a frequency near that of the desired wave;
- and
- a switch circuit that switches an operation to suppress a convergence power of the AGC loop when the power difference detector detects the interference wave.
Dependencies are inferred from the claim text.