On-Chip Resonant Supply Noise Canceller Utilizing Parasitic Capacitance of Sleep Blocks for Power Mode Switch

Abstract

This paper presents an on-chip resonant supply noise canceller utilizing parasitic capacitance of sleep blocks. The test chip was fabricated in a 0.18µm CMOS process and measurement results show 43.3% and 12.5% supply noise reduction on the abrupt supply voltage switching and the abrupt wake-up of a sleep block, respectively. The proposed method requires 1.5% area overhead for four 100k-gate blocks, which is 7.1X noise reduction efficient comparing with the conventional decap for the same power supply noise, while achieves 47% improvement of settling time. These results make fast switching of power mode possible for dynamic voltage scaling and power gating.