Filter with multiple outputs or inputs to implement multiple filter frequency responses

A method, comprising:

• receiving first and second signals at a filter input;
• filtering the first signal via a set of cascaded resonator stages to generate a first filtered signal at a first filter output;
• and
• filtering the second signal via a subset of one or more of the set of cascaded resonator stages to generate a second filtered signal at a second filter output, wherein:
• the set of cascaded resonator stages apply a first bandpass filter frequency response to the first signal to generate the first filtered signal;
• and
• the subset of one or more of the set of cascaded resonator stages apply a second bandpass filter frequency response to the second signal to generate the second filtered signal, wherein the first filter frequency response is different than the second filter frequency response.

An apparatus, comprising:

• a filter comprising a plurality of cascaded resonator stages;
• a first set of one or more cascaded resonator stages coupled between a first input to the filter and a second input to the filter, each cascaded resonator stage of the first set comprising a first series micro-acoustic resonator and a first parallel micro-acoustic resonator;
• and
• a second set of one or more cascaded resonator stages coupled between the second input to the filter and a filter output of the filter, each cascaded resonator stage of the second set comprising a second series micro-acoustic resonator and a second parallel micro-acoustic resonator, wherein the filter is configured to:
• apply a first bandpass filter frequency response to a first signal propagating from the first filter input to the filter output via the first and second sets of cascaded resonator stages;
• and
• apply a second bandpass filter frequency response to a second signal propagating from the second filter input to the filter output via the second set of one or more cascaded resonator stages.