BF959 SPICE model

Has anyone got a SPICE model for the On Semi (was Mot.) BF959? I and someone else who is interested in using this device can't find one anywhere. I've bought 2000 of them very cheaply on eBay. 8-)

Leon

"Leon Heller" wrote:

Here you go:

Si 625mW 20V 100mA 700MHz VHF pkg:TO-92B 3 1 2

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IS: Transport saturation current 10.2e-15 BF: Ideal maximum foward beta 78.00 NF: Foward current emission coefficient 1.000 VAF: Foward Early voltage 80.50 IKF: Foward beta high current roll-off 60.00m ISE: B-E leakage saturation current 16.80p NE: B-E leakage emission coefficient 2.000 BR: Ideal maximum reverse beta 4.000 NR: Reverse current emission coefficient 1.000 VAR: Reverse Early voltage 12.00 IKR: Reverse beta high current roll-off 90.00m ISC: B-C leakage saturation current 0.000 NC: B-C leakage emission coefficient 2.000 RB: Zero-bias base resistance [0,] 2.060 IRB: Current at halfway base resistance 0.000 RBM: High current minimum base resistance 0.000 RE: Emitter resistance [0,] 515.0m RC: Collector resistance [0,] 206.0m CJE: B-E zero-bias depletion capacitance [0,] 1.740p VJE: B-E built-in potential 1.100 MJE: B-E junction exponential factor 500.0m TF: Ideal foward transit-time [0,] 227.0p XTF: Coefficient for bias depletion of TF 0.000 VTF: Voltage describing VBC dependence of TF 0.000 ITF: High-current parameter for effect on TF 0.000 PTF: Excess phase at freq.=1.0(TF*2PI) Hz 0.000 CJC: B-C zero-bias depletion capacitance [0,] 2.250p VJC: B-C built-in potential 300.0m MJC: B-C junction exponential factor 300.0m XCJC: Fraction of B-C capacitance at base node 1.000 TR: Ideal reverse transit-time [0,] 158.0n CJS: Zero-bias collector-saturation capacitance [0,] 0.000 VJS: Substrate junction built-in potential 750.0m MJS: Substrate junction exponential factor 0.000 XTB: Foward/reverse beta temp. coefficient 1.500 EG: Energy gap for temperature effect on IS 1.110 XTI: Temperature exponent for effect on IS 3.000 KF: Flicker-noise coefficient 0.000 AF: Flicker-noise exponent 1.000 FC: Foward-bias capacitance coefficient 500.0m TNOM: Paramameter measurement temperature 27.00

Thanks very much for those parameters, Terry.

I've put them into standard SPICE format:

..model BF959 NPN(IS=10.2e-15 BF=78.00 NF=1.000 VAF=80.50 IKF=60.00m ISE=16.80p NE=2.000 BR=4.000

• NR=1.000 VAR=12.00 IKR=90.00m ISC=0.000 NC=2.000 RB=2.060 IRB=0.000 RBM=0.000
• RE=515.0m RC=206.0m CJE=1.740p VJE=1.100 MJE=500.0m TF=227.0p XTF=0.000 VTF=0.000
• ITF=0.000 PTF=0.000 CJC=2.250p VJC=300.0m MJC=300.0m XCJC=1.000 TR=158.0n CJS=0.000
• VJS=750.0m MJS=0.000 XTB=1.500 EG=1.110 XTI=3.000 KF=0.000 AF=1.000 FC=500.0m TNOM=27.00)

It seemed to work OK when I added it to the Pulsonix SPICE library and pasted the device into an existing schematic.

Leon

Terry,

Where did the file come from? I posted my model taken from it to the QRP-L list and someone wanted to know.

Leon

Hi, Leon and Terry. I'm the one who asked on the QRP-L mail list. Having a library of SPICE models for all devices would be a very valuable resource. Fairchild has a full library for just about every device that they have made, but unfortunately this is not one of them.

Chris

,----------------------. High Performance Mixers and / What's all this \\ Amplifiers for RF Communications / extinct stuff, anyhow? / \\ _______,--------------' Chris Trask / N7ZWY _ |/ Principal Engineer oo\\ Sonoran Radio Research (__)\\ _ P.O. Box 25240 \\ \\ .' `. Tempe, Arizona 85285-5240 \\ \\ / \\ \\ '" \\ IEEE Member #40274515 . ( ) \\ '-| )__| :. \\ Email: snipped-for-privacy@earthlink.net | | | | \\ '.

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I've

Chris/Leon: It came straight out of the model library in CircuitMaker