an arbiter based on-chip droop detector system
This paper presents a new design of supply droop detector system with a 10-20mV resolution at a very fast sampling rate (3GHz) in IBM 45nm SOI process. The detector system samples noisy supply voltage and stable reference voltages, and these sampled voltages are converted into different propagation delay values by using current starved inverters. Simple arbiters are used to convert these propagation delay differences into digitally reconstructed supply droop voltage. In addition, the detector has only 1 clock latency; a digital value of supply droop voltage is available after one clock cycle. This new droop detector system can greatly assist an adaptive frequency scaling system with a digital control and short latency.
supply droop droop detection