eldo_user

Chapter 3
Eldo Premier
This chapter details the high performance Eldo simulation kernel dedicated to transient
simulation: Eldo Premier.
Overview of Eldo Premier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Enabling Eldo Premier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Automatic Activation of Eldo Premier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Using Eldo Classic DC Solution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Handling Matrix-Like Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Solver Generation Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Eldo Premier Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Temporary Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Generic Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Forcing Elaboration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Eldo Premier Selectable Accuracy Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Netlist Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Supported Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Supported Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Supported Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Other Supported Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Miscellaneous Limitations of Devices and Features in Eldo Premier . . . . . . . . . . . . . . . . 93
Overview of Eldo Premier
The Eldo Premier simulator provides an increase in performance and capacity without
sacrificing accuracy compared to Eldo Classic. It accelerates the simulation of large circuits in
either pre-layout or post-layout phases by using sophisticated resolution techniques which do
not sacrifice accuracy compared to the “golden SPICE” (Eldo Classic) results. Eldo Premier
supports much larger circuits, up to ten million devices, compared to Eldo Classic. The easy use
model of Eldo Classic is preserved.
The Eldo Premier simulator accelerates both single-thread simulations and multi-thread
simulation. The acceleration of single-thread simulation is provided by new algebraic
techniques for the resolution of the system of non-linear differential equations that analog
simulators must solve. The acceleration of multi-threaded simulations is a consequence of the
natively parallel code of the Eldo Premier simulation kernel and its dedicated data structures.
These two acceleration factors naturally combine to offer a very significant speedup over Eldo
Classic. The most significant speedups are observed for large circuits (typically at least 10,000
devices) that exhibit some degree of hierarchical regularity.
Eldo® User's Manual, 15.3 61