We propose a novel circuit called charge-borrowing decap (CBD) as a drop-in replacement for passive decaps to reduce supply noise for removal of “hot-spot” IR-drop problems found late in the design process. Measurement results on a 90nm test chip show that a noise reduction improvement between 42%–55% at 100MHz-1.5GHz over its passive counterpart.
['Xiongfei Meng', 'Resve Saleh', 'Steven J. E. Wilton']
Charge-borrowing decap: A novel circuit for removal of local supply noise violations