Digital filter

A method, comprising:

• a first stage of a digital filter receiving input data to be filtered, the first stage of a digital filter operating at a first clock;
• a second stage of the digital filter outputting filtered output data, the second stage of the digital filter operating on a second clock, wherein a ratio of a frequency of the first clock and a frequency of the second clock is a fractional number, and a frequency of the second clock is higher than a frequency of the first clock;
• the first stage receiving an indication of a ratio of the first clock and the second clock;
• and
• the first stage receiving an indication of a time offset between (1) a clock pulse of the second clock, which occurs between a first clock pulse and a second clock pulse of the first clock, and (2) the first clock pulse of the first clock.

A digital filter, comprising:

• a first stage operating at a first clock having a first input;
• and
• a second stage operating at a second clock having a second input, a third input and a first output, wherein:
• a frequency of the first clock is higher than a frequency of the second clock,
• a ratio of a frequency of the second clock and a frequency of the first clock is a fractional number,
• the first input is configured to receive input data to be filtered,
• the second input is configured to receive an indication of the ratio of the second clock and the second clock,
• the third input is configured to receive an indication of a time offset between (1) a clock pulse of the first clock, which occurs between a first clock pulse and a second clock pulse of the second clock, and (2) the first clock pulse of the second clock, and
• the first output is configured to provide filtered output data.

A method, comprising:

• a first stage of a digital filter receiving input data to be filtered, the digital filter operating at a first clock;
• a second stage of the digital filter outputting filtered output data, the second stage of the digital filter operating on a second clock, wherein a ratio of the second clock and the first clock is a fractional number, and a frequency of the first clock is higher than a frequency of the second clock;
• the second stage receiving an indication of a ratio of the second clock and the first clock;
• and
• the second stage receiving an indication of a time offset between (1) a clock pulse of the first clock, which occurs between a first clock pulse and a second clock pulse of the second clock, and (2) the first clock pulse of the second clock.