Outline - HackMD

% OpenVAF and Verilogae % Open-Source VerilogA Compiler tools for Parameter extraction % Pascal Kuthe # Outline * Motivation * * Current State (Live Demo) * Plans for NGSPICE Integration # Motivation  - Parameter extraction without circuit simulation (DMT) - Use multiple individual measurments - Based on literature - Without circuit simulation -> Requires the modelequations - Previously: Handimplementations of HICUM/L2 - Error prone - Lots of maitaince - Lots of work for a new model - Not very fast -> Classic problem for a compiler ## Requirements * Support all compact models of the CMC * Fast compilation and execution * Compile functions that only calculate the value of a singular variable * List all parameters, voltages and currents that influence a variable * Dependency breaking ## Examening existing "compilers" * ADMS * effictifly a transpiler * abondoned * Can't produce subfunctions for individual variables * VAPP * Not a compiler (donesn't produce executable code) * Bound to matlab * Can't produce subfunction for individual variable -> A suitable opensource VerilogA compiler doesn't exist ## Introducing Verilogae * Built on top of OpenVAF: * Fully feature modular compiler for VerilogA * Targets LLVM the backend used by: Clang, Swift, Rust * Abstract represntation of the source code * Automatic symbolic derivatives of arbitrary order * State of the art optimization algorithems * Uses optimizations algorithems to generate functions for variables * Generates a python interface that can be easily called f # Simple demonstration Calculate current and capacitance from measued voltage and temperature # Current State ![diode_current](diode_i.pdf) # Current State ![diode_capacity](diode_c.pdf) # HICUM/L2 rigorus # Development * Fully integrated into DMT * Mostly feature complete * Well tested using HICUM/L2 and HICUM/L0 * All BSIM and VBIC models compile * Bug reports appriciated * Outlook: Work towards compiling compact models for NGSPICE using OpenVAF