Methods, circuits, systems and apparatus providing audio sensitivity enhancement in a wireless receiver, power management and other performances
AssigneeTexas Instruments Incorporated
InventorJaiganesh Balakrishnan
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Abstract
A wireless receiver includes a down converter module operable to deliver a signal having a signal bandwidth that changes over time, a dynamically controllable filter module having a filter bandwidth and fed by said down converter module, and a measurement module operable to at least approximately measure the signal bandwidth, said dynamically controllable filter module responsive to said measurement module to dynamically adjust the filter bandwidth to more nearly match the signal bandwidth as it changes over time, whereby output from said filter module is noise-reduced. Other wireless receivers, electronic circuits, and processes for their operation are disclosed.
Claims22
An electronic circuit comprising:
- a down-converter configured to down-convert a first signal at a first frequency to a second signal at an intermediate frequency (IF) that is lower than the first frequency;
- and
- a digital processor circuit comprising:
- a de-rotator configured to convert the second signal from the IF to a baseband signal having a baseband frequency that is lower than the IF,
- a channel select filter comprising a first filter stage and a second filter stage, wherein the channel select filter is configured to filter the baseband signal to generate a filtered baseband signal, and wherein the digital processor circuit is configured to, in a first mode, enable the second filter stage, and in a second mode, disable the second filter stage.
Dependencies are inferred from the claim text.