Discrete time filter, communication unit, and method for resonant charge transfer
AssigneeMediaTek Singapore Pte. Ltd.
InventorFederico Alessandro Fabrizio Beffa
Life of this patent
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Abstract
A discrete time filter, DTF, is described that comprises a summing node; N parallel branches, each branch having a set of input unit sampling capacitances where each unit sampling capacitance is independently selectively coupleable to the summing node; and an output capacitance connected to the summing node. The output capacitance has a value equal to a sum of the sampling capacitances that are to be selectively connected to the summing node; and the discrete time filter further comprises an inductance connected between the summing node and the output capacitance.
Claims20
A discrete time filter, DTF, for effecting a resonant charge transfer, the DTF comprising:
- a summing node;
- N parallel branches, each branch having a set of input unit sampling capacitances where each input unit sampling capacitance is independently selectively coupleable to the summing node;
- and
- an output capacitance connected to the summing node such that a resonant charge transfer is effected;
- wherein
- the output capacitance has a value equal to a sum of the sampling capacitances that are to be selectively connected to the summing node;
- and
- the discrete time filter further comprises a series inductance connected between the summing node and the output capacitance.
A wireless communication unit comprising a discrete time filter, DTF, for effecting a resonant charge transfer, the DTF comprising:
- a summing node;
- N parallel branches, each branch having a set of input unit sampling capacitances where each unit sampling capacitance is independently selectively coupleable to the summing node;
- and
- an output capacitance connected to the summing node such that a resonant charge transfer is effected;
- wherein
- the output capacitance has a value equal to a sum of the sampling capacitances that are to be selectively connected to the summing node;
- and
- the discrete time filter further comprises a series inductance connected between the summing node and the output capacitance.
A method of effecting a resonant charge transfer in a discrete time filter comprising a summing node and N parallel branches, each branch having a set of input unit sampling capacitances and an output capacitance connected to the summing node;
- the method comprising:
- independently selectively coupling a plurality of unit sampling capacitances to the summing node, which is connected to an output capacitance via an inductance, wherein the output capacitance has a value equal to a sum of the sampling capacitances that are selectively coupled to the summing node;
- and
- effecting a resonant charge transfer from the selected plurality of unit sampling capacitances to the output capacitance.
Dependencies are inferred from the claim text.