* subcircuit kewopamp.cir - dkg f00
.subckt kewopamp v_plus v_minus v_out V_pos V_neg Rin Eamp Rout
*
* An "almost ideal" opamp with the output voltage 
*  limited to the power supply rails V_pos & V_neg
* v_plus  = "+" terminal input
* v_minus = "-" terminal input
* v_out   = output terminal
* V_pos   = positive supply voltage node
* V_neg   = negative supply voltage node

Rin  v_plus v_minus 2.e+5
Eamp v_1 0 v_plus v_minus 2.e+5
Rout v_1 v_out 75
Dpos v_out V_pos Dmod
Dneg V_neg v_out Dmod
.model Dmod D (N=1u)
.ends
.end