Active bridge-based chiplet interconnect architecture with short-to-long converter circuit

A semiconductor integrated circuit device that comprises:

• an active bridge;
• a first chiplet mounted onto the active bridge;
• a second chiplet mounted onto the active bridge;
• and
• a short-to-long converter circuit that includes an analog portion and a digital portion, wherein the digital portion is disposed in at least one of the first chiplet and the second chiplet;
• wherein the active bridge comprises:
• at least the analog portion of the short-to-long converter circuit, which is electrically connected to at least the first chiplet;
• a short-reach physical layer that electrically connects the first chiplet and the second chiplet;
• and
• a built-in-self-test (BIST) circuit that is connected in communication with at least the analog portion of the short-to-long converter circuit.

A method that comprises, in a semiconductor integrated circuit device that comprises two chiplets, a first module, a substrate, a second module, and an active bridge that is connected between the two chiplets and the first module:

• generating a parallel short-reach signal in one of the chiplets;
• serializing the short-reach signal;
• transmitting the short-reach signal from the one of the chiplets to the active bridge;
• conditioning the serialized signal as a long-reach signal;
• and
• transmitting the long-reach signal from the active bridge through the first module and the substrate to the second module.