Name
Title | ||
|---|---|---|
25.9 Reconfigurable Transient Current-Mode Global Interconnect Circuits in 10nm CMOS for High-Performance Processors with Wide Voltage-Frequency Operating Range. |
Abstract | ||
|---|---|---|
The clock frequency of high-performance processors in the high-voltage turbo/burst operation mode [1] is governed primarily by the RC-dominated global interconnects in the communication fabrics and NoCs, since the interconnect RC delay does not improve proportionally with logic gate delay at higher voltages. Prior current-mode and pre-emphasis techniques for improved interconnect throughput and energy efficiency [2]–[5] do not address the critical turbo/burst mode latency requirements, and do not consider tunability across a wide voltage-frequency operating range in high-performance processors. Their transmit/receive circuits with complicated data recovery and differential signaling incur major latency and wiring resource overheads, especially for shorter bus distances typical in NoCs. Previous hybrid current/voltage-mode signaling used expensive 4-inversion repeaters without reconfigurable resistive termination strength, and required multi-cycle windows for current-mode operation with limited power savings at high data activities [6]. Other techniques address scalability to lower supply voltages, but do not focus on the critical interconnect RC delay bottlenecks at high voltages [7]. In this paper, we present reconfigurable current/voltage-mode driver/repeater/receiver circuits for on-die global interconnects/busses, fabricated in 10nm CMOS, with transient current-mode operation, achieving: i) up to 38% lower delay/mm vs. voltage-mode operation, ii) 5x lower transient current-mode power vs. always-on current-mode operation at 100% data activity, iii) similar noise immunity as voltage-mode operation, iv) tunable current-mode configuration for optimized performance vs. energy across PVT corners, and v) up to 8x increased repeater distance. |
Year | DOI | Venue |
|---|---|---|
2020 | 10.1109/ISSCC19947.2020.9063158 | ISSCC |
DocType | Citations | PageRank |
Conference | 0 | 0.34 |
References | Authors | |
0 | 14 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Mark A. Anders | 1 | 12 | 3.03 |
| Himanshu Kaul | 2 | 456 | 51.07 |
| Seongjong Kim | 3 | 2 | 1.13 |
| Gregory K. Chen | 4 | 298 | 32.96 |
| Raghavan Kumar | 5 | 73 | 12.56 |
| Huseyin Sumbul | 6 | 6 | 2.29 |
| Phil Knag | 7 | 18 | 3.17 |
| Monodeep Kar | 8 | 53 | 12.66 |
| S. K. Hsu | 9 | 521 | 52.06 |
| amit agarwal | 10 | 65 | 5.39 |
| Vikram B. Suresh | 11 | 2 | 1.73 |
| S. Mathew | 12 | 462 | 76.59 |
| Ram Krishnamurthy | 13 | 650 | 74.63 |
| Vivek De | 14 | 3024 | 577.83 |