Electronics Forum / CAD / March 2008

As in (diaphragm only, needs FET, of your choice, added)....

*** EDITED for PSpice by JET, 7/7/2005 ***
*M154_Correlated - 8.63um Effective Gap, 45um Vent Holes
*
* .PARAM VBIAS = 4.2
* .PARAM PHI = {0.07439*VBIAS}
*
* V_NOISE MIC_IN_PLUS MIC_IN_MINUS SIN(0 {1/PHI} 1000) AC {1/PHI}
* XSINGLE_DIAPHRAGM_1 BACKVOLUME MIC_IN_PLUS GND MIC SINGLE_DIAPHRAGM
*
C_BV BACKVOLUME MIC_IN_MINUS {3.5123e-014*PHI**2}
*
.SUBCKT SINGLE_DIAPHRAGM IN_MINUS IN_PLUS OUT_MINUS OUT_PLUS
*
.PARAM VBIAS = 4.2
.PARAM PHI = {0.07439*VBIAS}
C_O        OUT_PLUS OUT_MINUS  {1.5278e-013}
C_P_ANCHOR    OUT_PLUS OUT_MINUS  {1.65e-013}
C_D        NET3 OUT_PLUS    {1.2622e-014*PHI**2}
L_D        NET1 NET3    {19029.7355/PHI**2}
L_L        NET1 NET4    {34.9782/PHI**2}
R_L        NET4 OUT_MINUS    {14453781512.605/PHI**2}
R_G        OUT_MINUS NET5    {97987627.0912/PHI**2}
R_V        NET6 NET7    {103327939.9914/PHI**2}
L_G        NET5 NET6    {313.025/PHI**2}
L_V        NET7 IN_MINUS    {543.2099/PHI**2}
L_R        IN_PLUS NET1    {1038.0656/PHI**2}
** R_R        NET1 NET2    {0/PHI**2}
; HUH? ...Renamed NET2 = NET1
*
.ENDS SINGLE_DIAPHRAGM

** As is, no warranties, or other assistance available ;-)

                                       ...Jim Thompson

           
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