HiSIM2 and PSP Integration in SmartSpice, SmartSpiceRF and UTMOSTIV

1
HiSIM-2 and PSP Integration in SmartSpice,
SmartSpice-RF and UTMOSTIV

• Jean-Paul Malzac
• CMC June 30, 2005

2
HiSIM-2 Integration Current Status

• Silvaco implementation in SmartSpice/UTMOST
• Based on the latest code provided by HiSIM2
  developers
• Invoked by specifying LEVEL111 VERSION200
• NQS model based on internal network
  (BSIM3/BSIM4-like)
• compatible with integration approach for
  transient analysis
• AC/RF results consistent with transient analysis
• both schemes will be supported in the near
  future
• BSIM3v3.1 bulk junction diode models
• VDIFFJ not supported default value (0.5)
  ensures compatibility
• other models available via ACM/DIOLEV/JCAP
  selectors

3
HiSIM-2 Bug Fixes, Pending Problems

• Summary of recent bug fixes
• NaN problem in Qbmm equation (negative argument
  of sqrt())
• Bug fix (smoothing function) posted on HiSIM2
  web page
• Silvaco current implementation updated
  accordingly
• Poly-depletion effect dPpgP expression no
  longer consistent with recent changes in dPpg
  equations (PGD4 not accounted for)
• reported to HiSIM2 developers
• Silvaco current implementation updated
  accordingly
• Pending convergence problems with NQS turned on
• Still under investigation

4
HiSIM-2 Bug fix in GISL/GIDL Currents
Discrepancies between SmSpice/spice3f5 results
discontinuity at Vds0
5
PSP Integration Current Status

• Silvaco implementation in SmartSpice/UTMOST
• Based on the latest Verilog-A code provided by
  PSP developers
• Invoked by specifying LEVEL1000 (global model
  only)
• ADMS scripts for SmartSpice/UTMOST API under
  development
• Only DC/AC analysis available
• No NQS effect, no noise model available
• No optimization for speed, convergence or memory
  saving

6
PSP Integration ADMS Software

• Summary of problems encountered using ADMS tool
• ADMS crash (segmentation fault)
• tested on Solaris 8 and Linux RH9 platforms only
• versions 2.0.0 and 1.48.1 only (old version
  1.42.0 is OK)
• No updated documentation available but good
  examples provided with ADMS source code (VBIC
  Verilog-A description with ADMS
  extra-information and scripts for zspice API)
• No scripts for Berkeley spice3f5 API available
  (public domain)
• ADMS future development supported by CMC?