Op-Amp Parameters:

Parameter	Definition
F1	Differential input resistance $R_{in}(\Omega)$
F2	Common mode input resistance $R_{cm}(\Omega)$
F3	Gain bandwidth product $GBWP(Hz)$
F4	Open loop gain $A_{o}(V/V)$
F5	Output resistance $R_{o}(\Omega)$
F6	Second pole frequency $(Hertz)$
F7	Input noise voltage spectral density $e_{n}(V/\sqrt{Hz})$
F8	input noise current spectral density $i_{n}(A/\sqrt{Hz})$
F9	Input noise voltage 1/f corner $(Hertz)$
F10	Input noise current 1/f corner $(Hertz)$

The second pole frequency defaults to infinity. The noise sources default to zero amplitude. The 1/f corner frequencies default to zero Hertz. See Appendix B for more information on the op-amp noise sources.

Examples:

* lm741 model, Rin = 2M, Rcm = 5G, GBWP = 1MHz,

* Ao = 200k, Ro = 75, no second pole, no noise.

.MODEL 741 2.e6 5.e9 1.e6 2.e5 75.

;

* op21 model, Rin = 10M, Rcm = 10G, GBWP = 600KHz, Ao = 2M

* Ro = 1k, second pole at 500KHz

* en = 20 nV/SQRT(Hz), in = .3 pA/SQRT(Hz)

* 1/f(en) = 8 Hz, 1/f(in) = 30 Hz.

.MODEL op21 10.e6 10.e9 6.e5 2.e6 \

     1.e3 5.e5 \

     2.e-8 .3e-12 \

     8. 30.

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