Interpolation delay cell for 2ps resolution jitter injector in optical link transceiver

A method for generating a delayed signal, comprising:

• filtering first components of two differential input signals using a first filter coupled between the first components;
• filtering second components of the differential input signals using a second filter coupled between the second components;
• and
• generating a delayed differential signal based on the filtered components of the two differential input signals, wherein the first components are positive components of the differential input signals and the second components are negative components of the two differential input signals.

A system, comprising:

• a first circuit;
• and
• a second circuit including:
• a first filter to filter first components of two differential input signals;
• a second filter to filter second components of the differential input signals;
• and
• a delay cell to generate a delayed differential signal based on outputs of the first and second filters, the delayed differential signal controlling the first circuit, wherein the first components are positive components of the first and second differential signals and the second components are negative components of the first and second differential signals and wherein the first filter is coupled between the first components and the second filter is coupled between the second components.