************************************************************************
* tubes.lib  -  Andrei's tube models library (for LTSpice)
* 
* Copyright (C) 2001-2005 Andrei Frolov <frolov@cita.utoronto.ca>
* Distributed under the terms of GNU Public License.
* 
* Based on the models and ideas of many people; see in particular
*   - Norman Koren pages <http://www.normankoren.com/Audio/>
*   - Duncan Munro pages <http://www.duncanamps.com>
*   - Spice models survey by Stefano Perugini
*       <http://digilander.iol.it/paeng/spice_models.htm>
*   - Vacuum tube parameter identification by Mithat F. Konar
*       <http://www.birotechnology.com/articles/VTspice.html>
* 
************************************************************************
* 6111  -  IDH subminiature medium-mu twin Bp  P K  I=(m)*uramp(()*V(G,K)+V(P,K))**1.5
* From GE 6111 datasheet - traced on 19-01-04 by AF
.subckt 6111  P G K
    Cgp G P  1.5p
    Ci  G K  1.9p
    Co  P K  0.32p
* Modified Koren model (8 parameters): mean fit error 0.201853 mA
    Bp  P K  I=(0.02034100865m)*uramp(V(P,K)*ln(1.0+(-0.2330777236)+exp((3.468205829)+(3.468205829)*((22.70785084)+(-161.593886m)*V(G,K))*V(G,K)/sqrt((12.6772307)**2+(V(P,K)-(8.855211259))**2)))/(3.468205829))**(1.49067916)
.ends 6111