  MODEL 1N4001 (PERM) (A-K)
  Cordwell: Transistor   and  Diode Model Handbook , AFWL -TR-69-44
  units : SI
     ELEMENTS
       CD, A-K = Q1 (13D-12,1.,VCD ,.41,2.5D-5,JD,8D-9)
       RS, A-K = 6.4E8
       JD, A-K = DIODE EQUATION (8D-9,21.)
     FUNCTIONS
       Q1(AA,BB,CC,DD,EE,FF,GG) = (AA/(BB-   MIN(0.,CC))**DD + EE*(FF+GG))
