The Repeater Chain IP is a mixed-signal, high-speed, low-power signal conditioning block designed to restore signal quality across long on-chip interconnects. It consists of a cascaded buffer/inverter architecture that compensates for RC-induced delay and waveform degradation, ensuring clean and reliable digital signal propagation over extended wire lengths.

The core employs a multi-stage structure of optimally sized CMOS repeaters, each regenerating the signal and sharpening its transition edges. Input and output are both standard digital logic levels, with the output exhibiting enhanced edge rate and minimized delay skew. The number and placement of repeater stages are tuned based on wire length, capacitive loading, and timing constraints.

To support robust operation under process, voltage, and temperature (PVT) variations, the IP optionally integrates control logic for dynamic drive strength adaptation. This ensures consistent performance across corner cases without requiring external calibration.

Designed for integration in global SoC routing paths, clock distribution trees, and high-speed data buses, the Repeater Chain IP provides an essential solution for maintaining signal integrity and timing reliability in advanced digital systems. Figure 1 shows the functional block diagram of the repeater chain, including the parasitic load capacitance from the metal line. Implemented in a 28nm standard CMOS process with minimal area and power overhead, it is well suited for power-conscious, high-performance applications.