Does anyone have spice models for MRF545/MRF544? Maybe from the Intusoft ICAP4 package?

Hello Frank, you should try a search with Google with the following text.

mrf545 spice

Use the third link. Ok it's dead but click on "cache" there. They have kept the data.

Best Regards, Helmut

"Frank Moe" schrieb im Newsbeitrag news: snipped-for-privacy@posting.google.com...

Hi Helmut,

thanks for the info, but I had found that before. This model uses heavy caps in the subcircuit around the transistor model, so I think it has been tweaked only for one single bias point. As I will have to amplify also DC over a wide voltage range I might need a better matched model...

Anyone here have the Intusoft library? Frank

..SUBCKT MRF545 1 2 3 LC 1 4 0.905E-9 LB 2 6 0.237E-9 LE 5 3 2.789E-9 CC 4 3 1.068E-12 CB 4 6 0.548E-12 Q1 4 6 5 QR96 ..MODEL QR96 PNP ( BF=77 VAF=40 VAR=5.6 RC=1.06 RB=1.10

+RE=0.592 IKF=2.80E-01 ISE=3.60E-14 TF=4.747E-11 +TR=3.42E-09 ITF=6.65E-02 VTF=2.31E+01 CJC=4.646E-12 +CJE=63.84E-12 XTI=3.0 NE=1.5 ISC=1.20E-14 EG=1.11 PTF=25 +XTB=1.5 BR=2.00 VJC=0.75 VJE=0.75 IS=4.00E-15 +MJC=0.33 MJE=0.33 XTF=4.0 IKR=2.80E-01 KF=1.0E-15 +NC=1.7 FC=0.50 RBM=0.81 IRB=4.00E-02 XCJC=0.561 ) ..ENDS

I assume you already have the datasheet s-parameters.

--
 Thanks,
    - Win

Winfried,

many thanks for your help! Is this the Intusoft model? Do you also have the 544 model?

I do not have s-parameters as I have no original data sheet. Only the datasheet of the substitutes from the other manufacturers... Frank