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- .\" needs tbl, eqn and -me
- .ll 6.5i
- .he '''%'
- .m1 1i
- .nr ?t 1
- .po 1i
- .if n \
- . ls 2
- .if t \
- \{\
- . nr $r 15p/10
- . sz 10
- .\}
- .(l C
- .b "Significant changes since SPICE3A5"
- .sp 0.1i
- \*(td
- .sp 0.2i
- T. Quarles
- A.R.Newton, D.O.Pederson, A.Sangiovanni-Vincentelli
- .sp 0.2i
- Department of Electrical Engineering and Computer Sciences
- University of California
- Berkeley, Ca., 94720
- .sp 0.2i
- .)l
- .sh 1 "New features"
- .ip \(bu
- In SPICE3A6 we have introduced two new devices, the voltage
- controlled switch and the current controlled switch.
- These switches allow a controlling voltage or current
- to switch the resistance between two nodes from a very large
- value to a very small value.
- .ip \(bu
- The SPICE front end interface has been expanded to recognize and
- process the .PRINT and .PLOT cards from SPICE2 which were previously
- ignored.
- .sh 1 "Enhancements"
- .ip \(bu
- The MOS level 1 model code has been rearranged and optimized,
- resulting in a significant speed improvement.
- As a part of this
- optimization, the default value of MJSW, the junction sidewall
- grading coefficient was changed from .33 to .5.
- .ip \(bu
- The transient analysis routine has been modified so that it is now
- interruptable when running the interactive version of SPICE.
- .sh 1 "Changes"
- .ip \(bu
- The front end 'end' command has been changed to 'reset' to prevent
- confusion with the SPICE2 .END command.
- .sh 1 "Fixes"
- .ip \(bu
- A problem causing errors during subcircuit expansion with models has been fixed.
- .ip \(bu
- Parsing problems with .IC, .NODESET, and JFET cards have
- been fixed.
- .ip \(bu
- Mosfet models now correctly handle the XJ parameter.
- .ip \(bu
- Several assignments which caused the 'UIC' flag to be lost have been fixed
- .ip \(bu
- In a level 2 or level 3 MOSFET, a problem with preprocessing of
- certain parameters when TOX was not specified has been fixed.
- .ip \(bu
- A divide by zero error during AC analaysis of mosfets when no resistance
- was specified has been fixed.
- .ip \(bu
- A rounding error problem which could cause pulse sources to stop setting
- breakpoints has been fixed.
-