Trexler, Bushnell, Giangiorgi & Blackstone Ltd.
On-chip automatic process variation, supply voltage variation, and temperature deviation (PVT) compensation method
An on-chip substrate voltage controller which includes a plurality of chains of interconnected loaded ring oscillators connected to a multiplexer, where the multiplexer is configured to average the outputs from all the chains of interconnected loaded ring oscillators. An output of the multiplexer is connected to a comparator, such as a phase detector. The comparator also receives an output from a PLL, and is configured to compare the output of the multiplexer to the output of the PLL. An output of the comparator is connected to the controllable voltage regulator. The controllable voltage regulator receives a voltage in as well as the output of the comparator, and applies a substrate bias depending on what is received from the comparator.
LSI Logic Corporation
H
H03K
inventional
Weidan Benjamin Johann
Li Mbouombouo Leyrer