VLSI performance compensation for off-chip drivers and clock generation
US4939389A · kind A · utility
56Cited by
9References
46Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1988 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Sep 2, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/00384
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A performance-sensing element (PSE) circuit detects the actual speed of other circuits on the same chip by launching a pulse into a tapped cascade of circuits on the chip, then detecting how far the pulse has progressed after a known interval. Control signals indicating circuit speed can stabilize parameters of the other circuits, such as rate of change of current (di/dt) in driver circuits, absolute delay of clock signals from one chip to another, and relative delay of multiple clock signals within the chip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.