On-chip automatic process variation, supply voltage variation, and temperature deviation (PVT) compensation method
US7321254B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2004 |
| Grant date | Jan 22, 2008 |
| Priority date | — |
| Expiry date | Feb 10, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/0315
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.