Title :
Application of dynamic power supply scaling in a low-energy ATM interface
Author :
Li, S. Henry ; Zukowski, Charles A.
Author_Institution :
Dept. of Electr. Eng., Columbia Univ., New York, NY, USA
Abstract :
The potential for saving energy by employing dynamic power supply scaling in an ATM (Asynchronous Transfer Mode) interface circuit is analyzed and simulated. Feedback is used to adjust the power supply based on how full the input buffer is. Either a DC-DC converter or multiple supply voltages can be used. Self-timed processing circuitry allows the feedback to control the speed fairly precisely, even incorporating variations in process and operating conditions into the loop. The trade-offs and requirements for buffer size, converter response time, and control algorithm are discussed. Significant energy savings are possible if the power supply voltage can be adjusted quickly. A similar analysis can be used for applications other than an ATM interface
Keywords :
DC-DC power convertors; asynchronous circuits; asynchronous transfer mode; circuit feedback; low-power electronics; power supply circuits; telecommunication power supplies; DC-DC converter; asynchronous transfer mode interface circuit; buffer size; control algorithm; converter response time; dynamic power supply scaling; energy savings; feedback; low-energy ATM interface; multiple supply voltages; self-timed processing circuitry; Analytical models; Asynchronous transfer mode; Circuit analysis; Circuit simulation; DC-DC power converters; Dynamic voltage scaling; Feedback circuits; Feedback loop; Potential energy; Power supplies;
Conference_Titel :
Circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva. The 2000 IEEE International Symposium on
Conference_Location :
Geneva
Print_ISBN :
0-7803-5482-6
DOI :
10.1109/ISCAS.2000.857609
