Baseband receiver circuit
AssigneeNXP B.V.
InventorsFrederic Darthenay, Khurram Waheed
Life of this patent
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Abstract
A receiver path circuit includes a first stage, a down-sampler and a second stage. The first stage is configured to filter a mixer-output-signal received from a mixer and provide a first-stage-output-signal. The down-sampler is configured to down-sample the first-stage-output-signal to provide a transition-signal having a transition-frequency. The transition-frequency is lower than the frequency of the first-stage-output-signal. The second stage includes a switched-capacitor circuit that is configured to filter and reduce the frequency of the transition-signal in order to provide a second-stage-output-signal to an ADC.
Claims20
A receiver path circuit comprising:
- a first stage configured to:
- filter a mixer-output-signal received from a mixer;
- and
- provide a first-stage-output-signal;
- a down-sampler configured to:
- down-sample the first-stage-output-signal to provide a transition-signal having a transition-frequency, wherein the transition-frequency is a lower than the frequency of the first-stage-output-signal;
- a second stage, which comprises a switched-capacitor circuit that is configured to:
- filter and reduce the frequency of the transition-signal in order to provide a second-stage-output-signal to an ADC.
A composite baseband filter comprising in-phase and quadrature processing paths, each of which includes two complementary processing paths, wherein each processing path comprises a receiver path circuit,
- wherein the receiver path circuit comprises:
- a first stage configured to:
- filter a mixer-output-signal received from a mixer;
- and
- provide a first-stage-output-signal;
- a down-sampler configured to:
- down-sample the first-stage-output-signal to provide a transition-signal having a transition-frequency, wherein the transition-frequency is a lower than the frequency of the first-stage-output-signal;
- a second stage, which comprises a switched-capacitor circuit that is configured to:
- filter and reduce the frequency of the transition-signal in order to provide a second-stage-output-signal to an ADC.
Dependencies are inferred from the claim text.