! SIEMENS Small Signal Semiconductors ! BF840 ! Si NPN RF Bipolar Junction Transistor in SOT23 ! VCE = 1 V IC = 4 mA ! Common Emitter S-Parameters: January 1996 # GHz S MA R 50 ! f S11 S21 S12 S22 ! GHz MAG ANG MAG ANG MAG ANG MAG ANG 0.010 0.7903 -27.4 9.707 161.8 0.0073 74.9 0.9543 -3.6 0.020 0.7346 -50.3 8.623 147.5 0.0132 61.5 0.9220 -6.3 0.050 0.6199 -96.6 5.837 120.3 0.0210 40.0 0.8415 -8.7 0.100 0.5503 -131.6 3.394 99.8 0.0239 31.6 0.7989 -9.4 0.150 0.5398 -146.8 2.343 89.0 0.0249 32.8 0.7858 -10.8 0.200 0.5415 -155.7 1.779 80.8 0.0257 36.6 0.7791 -12.8 0.250 0.5489 -161.5 1.432 74.0 0.0266 41.8 0.7745 -15.0 0.300 0.5587 -166.1 1.198 68.0 0.0275 47.9 0.7678 -17.1 0.400 0.5771 -173.5 0.891 57.7 0.0308 60.4 0.7584 -21.9 0.500 0.5986 -179.2 0.703 48.7 0.0364 72.3 0.7469 -26.7 0.600 0.6143 175.4 0.569 41.1 0.0450 82.0 0.7344 -31.6 0.700 0.6326 170.5 0.474 34.8 0.0563 88.7 0.7202 -36.5 0.800 0.6491 165.8 0.398 29.5 0.0691 92.3 0.7052 -41.4 0.900 0.6615 161.2 0.338 26.0 0.0844 94.3 0.6891 -46.3 1.000 0.6732 156.8 0.288 24.1 0.1013 94.7 0.6725 -51.2 1.100 0.6844 152.4 0.246 24.1 0.1193 94.5 0.6549 -56.1 1.200 0.6951 148.2 0.214 26.6 0.1380 93.2 0.6367 -60.9 1.300 0.7012 144.3 0.190 30.7 0.1575 91.7 0.6178 -65.8 1.400 0.7062 140.4 0.177 37.3 0.1778 89.8 0.6001 -70.5 1.500 0.7130 136.4 0.174 43.9 0.1975 87.5 0.5816 -75.2 1.600 0.7150 132.8 0.177 50.8 0.2176 85.1 0.5628 -80.0 1.700 0.7152 129.3 0.185 55.7 0.2380 82.6 0.5454 -84.7 1.800 0.7182 126.1 0.201 60.9 0.2578 80.1 0.5274 -89.3 1.900 0.7195 122.9 0.220 63.2 0.2769 77.7 0.5091 -93.9 2.000 0.7177 119.3 0.242 65.0 0.2963 75.1 0.4942 -98.4 2.200 0.7147 113.2 0.280 63.7 0.3331 70.0 0.4626 -107.6 2.400 0.7095 107.3 0.320 61.5 0.3676 64.9 0.4352 -116.4 2.600 0.7046 101.9 0.364 58.0 0.3987 59.9 0.4100 -125.4 2.800 0.6992 97.3 0.399 54.7 0.4270 55.2 0.3903 -134.2 3.000 0.6893 92.7 0.425 50.5 0.4524 50.7 0.3721 -142.9 ! ! SIEMENS AG Semiconductor Group, Munich