Derating is a versatile technique supported by all static timing analysis (STA) tools in industry. In essence, it enables designers to modify any delay or slew computation performed by such tools.Also question is, what is timing derate in VLSI?
Timing derating factors model the effects of varying operating conditions by adjusting the delay values calculated for the individual timing arcs of a block. By default, the timing derating factors are 1.0 and the tool does not adjust the calculated delay values.
Also Know, what is SOCV in VLSI? Statistical OCV (SOCV) is a simplified approach to SSTA that uses a single local variable. It solves the major limitations of AOCV, including variation dependency on slew and load, and the assumption that the same cell, or load, is in the path.
Simply so, what is AOCV?
AOCV stands for Advanced OCV and SBOCV stands for Stage Based OCV. To clarify the need for AOCV, consider two cases of single and multiple cells. Single cell in isolation exhibits larger delay variation compared to number of cells in a path. Using one number (as in OCV for all cells) in STA results in pessimism.
What is Sigma POCV?
In POCV, instead of applying a specific derating factor to a cell, cell delay is calculated based on a delay variation of that cell. This delay variation (σ ) for each cell is obtained through Monte-Carlo HSPICE simulation. The variation value σ is a unique value specific to that library cell.
What is path depth in VLSI?
On-Chip-Variations (OCV): OCVs are simplistic and (generally) pessimistic view of modelling process variations. Here we use that the delay of all cells can show, let's say X% variation in their delays.What is OCV AOCV POCV?
OCV and AOCV are essentially models which guide us on how the cell delay varies in light of the systematic and random variations. On-Chip-Variations (OCV): OCVs are simplistic and (generally) pessimistic view of modelling process variations.What is AOCV and POCV?
POCV. Advanced on-chip variation (AOCV) analysis reduces unnecessary pessimism by taking the design methodology and fabrication process variation into account. AOCV determines derating factors based on metrics of path logic depth and the physical distance traversed by a particular path.What is on chip variation in VLSI?
On-chip variation (OCV) is a recognition of the intrinsic variability of semiconductor processes and their impact on factors such as logic timing.What is liberty variation format?
The Liberty Variation Format (LVF) introduces a local standard deviation sigma into the cell characterization library data, and a table format for sigma as a function of input pin slew and output load is provided.What is AOCV and POCV in VLSI?
POCV. Advanced on-chip variation (AOCV) analysis reduces unnecessary pessimism by taking the design methodology and fabrication process variation into account. AOCV determines derating factors based on metrics of path logic depth and the physical distance traversed by a particular path. 
