vco spice model

In PSpice, other simulators may require editing notation style...

****************************************************************** ..SUBCKT VCO_BEH VCONT OUT F PARAMS: FMAX=200Meg

• VMAX=2V FMIN=100Meg VMIN=1V ..PARAM PI = 3.141593 G_G1 VC N_1 VALUE { 1+ TANH(80*V(VC, N_1)) } G_G2 N_2 VC VALUE { 1+ TANH(80*V(N_2, VC)) } R_R1 N_3 VC 10K E_BUF1 N_3 0 VCONT 0 1 G_INTEG1 0 $$U_INTEG1 VALUE {V(OMEGA)} C_INTEG1 $$U_INTEG1 0 {1/1.0} R_INTEG1 $$U_INTEG1 0 1G E_INTEG1 OUT 0 VALUE {V($$U_INTEG1)} .IC V($$U_INTEG1) = 0v R_R2 F 0 1K V_V2 N_2 0 {VMIN-100m} V_V1 N_1 0 {VMAX+100m} R_R3 OUT 0 1K R_R4 OMEGA 0 1K E_E1 F 0 VALUE

• {((V(VC,0)-VMAX)*(FMAX-FMIN)/(VMAX-VMIN)+FMAX)} E_E2 OMEGA 0 VALUE { 2*PI*(V(F, 0)) } ..ENDS VCO_BEH

******************************************************************

...Jim Thompson

--
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
|  Analog/Mixed-Signal ASIC\'s and Discrete Systems  |    manus    |
|  Phoenix, Arizona            Voice:(480)460-2350  |             |
|  E-mail Address at Website     Fax:(480)460-2142  |  Brass Rat  |
|       http://www.analog-innovations.com           |    1962     |
             
I love to cook with wine.      Sometimes I even put it in the food.

I think it was indeed Indiana, but it was pi = 3, and only applied to small circles ;-)

...Jim Thompson

-- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | |

| 1962 | I love to cook with wine. Sometimes I even put it in the food.

Hello Jim,

Wasn't there a law that, at least for the state of Indiana: ..PARAM PI = 4?

Regards, Joerg

Snopes says the modern hoax is about Alabama but does mention (at the bottom) the bit about Indiana. They said it was passed in the Indiana House but died in the Senate.

Robert