1
Download HSPICE Model Guide - Sam Annor Main Page
Transcript
Calculating PHI, GAMMA, and VTO Introducing MOSFETs where, tnom = TNOM + 273.15 If VTO is not specified, then for Al-Gate (TPG=0), the work function Φ ms is determined by: eg PHI Φms = − ------ − type ⋅ ---------- – 0.05 2 2 where type is +1 for n-channel and -1 for p-channel. For Poly-Gate (TPG=±1), the work function is determined by: If the model parameter NGATE is not specified, eg PHI Φms = type ⋅ − TPG ⋅ ------ – ---------- 2 2 Otherwise, NGATE PHI Φms = type ⋅ − TPG ⋅ vt ⋅ ln --------------------- – --------- ni 2 Then VTO voltage is determined by: VTO = vfb + type ⋅ ( GAMMA ⋅ PHI 1 ⁄ 2 + PHI ) where, q ⋅ NSS vfb = Φms – ------------------- + DELVTO COX If VTO is specified, then, VTO = VTO + DELVTO 8-54 True-Hspice Device Models Reference Manual, Release 2001.4, revision A
