Resonant power supply noise reduction using a triangular active charge injection

This paper shows the efficacy of a triangular active charge injection for resonant power supply noise reduction by measuring a real silicon chip. Based on the analysis of a triangular active charge injection, our circuit composed of a voltage drop detector, a finite state machine (FSM) and canceling capacitors injects the adequate amount of charge into the supply line of the LSI so that the core supply voltage does not become lower than the voltage at the beginning of the canceling charge injection. The measurement result indicates that our circuit realizes 14% noise reduction with passive decap to mitigate spike noises and consumes 25.2 mW in steady state by 0.182 mm
²
silicon area.