A Multi-Slice VCO-based Quantizer for On-Chip Power Supply Noise Analysis Achieving 0.11 (mV) 2 /sqrt(MHz) Noise Floor

This paper presents a multi-slice VCO-based quantizer (MSVQ) for high-resolution power supply noise analysis. To relax the trade-off between accuracy and measurement time, a multi-slice quantizer at a relatively higher sampling rate is proposed, and the auto-covariance replaces the autocorrelation to obtain PSD while immunes the spurs introduced by the quantizers itself and further reduces noise floor. 0.11 (mV)2/sqrt(MHz) noise floor is achieved with a significantly reduced measurement time of 336s.