Low power lattice wave filter systems and methods

A system comprising:

• a first filter stage of a multistage sample rate converter comprising:
• an input operable to receive a digital input signal having a first sample rate;
• a first processing branch including a first delay element operable to receive the digital input signal and output a delayed digital input signal;
• a second processing branch including a first adder operable to receive the digital input signal and subtract a delayed feedback signal to produce a difference signal;
• and
• a second adder operable to combine the delayed digital input signal and the difference signal to produce an output signal;
• wherein the second processing branch further includes a feedback path including a second delay element operable to receive the output signal and output the delayed feedback signal;
• a first register electrically coupled between the first filter stage and a second filter stage, wherein the first register is controlled by a first clock signal and wherein the first filter stage and the second filter stage are controlled by a second clock signal.