* EL2170C/EL2176C/EL2270C/EL2276C/EL2470C Macromodel
* 70MHz current feedback amplifier
* Revision A, March 1995
* AC characteristics used Rf = 1K, Rg = 1K, RL = 150
* Connections:        +input
*                       |  -input
*                       |    | +Vsupply
*                       |    |    | -Vsupply
*                       |    |    |    |  output
*                       |    |    |    |    |
.subckt EL2170C         3    2    7    4    6
*
* Input Stage 
*
e1  10 0 3 0 1.0
vis 10 9 0V
h2   9 12 vxx 1.0
r1   2 11 165  
l1  11  12 25nH
iinp 3  0 0.5uA   
iinm 2  0 4uA
r12  3  0 4Meg
*
* Slew Rate Limiting
*
h1 13  0 vis 600
r2 13 14 1K
d1 14  0  dclamp
d2  0 14  dclamp 
*
* High Frequency Pole  
*
e2 30 0 14 0 0.00166666666
l3 30 17 0.5uH
c5 17 0 0.69pF
r5 17 0 300
*
* Transimpedance Stage
* 
g1 0 18 17 0 1.0
rol 18 0 400K 
cdp 18 0 1.9pF  
*
* Output Stage 
*
q1 4 18 19 qp 
q2 7 18 20 qn 
q3 7 19 21 qn 
q4 4 20 22 qp 
r7 21 6  4
r8 22 6  4
ios1 7 19 0.4mA
ios2 20 4 0.4mA
*
* Supply Current
*
ips 7 4 1nA
* Error Terms
* 
ivos 0 23 2mA
vxx 23  0 0V
e4  24 0 3 0 1.0
e5  25 0 7 0 1.0
e6  26 0 4 0 -1.0
r9  24 23 0.316K
r10 25 23 3.2K
r11 26 23 3.2K 
*
* Models
*
.model qn npn(is=5e-15 bf=200 tf=0.01nS)
.model qp pnp(is=5e-15 bf=200 tf=0.01nS)
.model dclamp d(is=1e-30 ibv=0.266 bv=1.3v n=4)
.ends EL2170C
*$