! SIEMENS Small Signal Semiconductors ! BF840 ! Si NPN RF Bipolar Junction Transistor in SOT23 ! VCE = 1 V IC = 3 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 0.8555 -16.5 8.551 168.4 0.0045 82.1 0.9871 -2.0 0.020 0.8245 -31.8 8.072 158.2 0.0087 73.8 0.9765 -3.8 0.050 0.7307 -68.0 6.562 135.4 0.0173 56.0 0.9298 -7.3 0.100 0.6297 -105.4 4.562 112.9 0.0231 43.2 0.8783 -9.4 0.150 0.5877 -127.1 3.351 99.7 0.0253 40.9 0.8566 -11.0 0.200 0.5704 -140.3 2.616 90.3 0.0267 41.7 0.8456 -12.7 0.250 0.5655 -149.4 2.137 82.8 0.0278 45.1 0.8388 -14.6 0.300 0.5648 -156.1 1.805 76.6 0.0287 49.5 0.8317 -16.6 0.400 0.5709 -166.3 1.366 65.8 0.0313 59.6 0.8222 -20.9 0.500 0.5839 -173.4 1.090 56.4 0.0361 70.3 0.8140 -25.4 0.600 0.5959 -179.6 0.899 48.2 0.0430 79.9 0.8035 -30.1 0.700 0.6088 175.0 0.759 40.9 0.0529 87.5 0.7927 -34.7 0.800 0.6232 169.9 0.650 34.5 0.0643 92.2 0.7809 -39.4 0.900 0.6389 165.3 0.561 28.8 0.0788 95.2 0.7668 -44.2 1.000 0.6469 160.7 0.485 24.1 0.0947 96.4 0.7521 -49.1 1.100 0.6625 156.1 0.422 20.3 0.1124 96.7 0.7372 -54.0 1.200 0.6764 151.6 0.365 18.1 0.1313 95.9 0.7213 -58.9 1.300 0.6825 147.8 0.314 17.1 0.1508 94.6 0.7037 -63.8 1.400 0.6919 143.7 0.278 18.3 0.1715 92.9 0.6867 -68.6 1.500 0.7010 139.4 0.245 20.3 0.1921 90.8 0.6680 -73.4 1.600 0.7053 135.9 0.222 25.2 0.2131 88.3 0.6484 -78.3 1.700 0.7091 132.4 0.206 30.1 0.2344 85.8 0.6310 -83.1 1.800 0.7125 128.8 0.198 38.5 0.2554 83.2 0.6124 -87.9 1.900 0.7143 125.3 0.201 43.5 0.2767 80.6 0.5916 -92.6 2.000 0.7157 121.6 0.211 51.2 0.2964 78.0 0.5746 -97.2 2.200 0.7104 115.1 0.246 55.7 0.3361 72.5 0.5392 -106.6 2.400 0.7073 108.9 0.286 57.6 0.3727 67.1 0.5060 -115.7 2.600 0.7043 103.2 0.333 56.5 0.4051 61.8 0.4756 -124.8 2.800 0.6973 98.4 0.372 54.2 0.4354 56.8 0.4506 -133.6 3.000 0.6907 93.5 0.406 51.3 0.4615 52.0 0.4269 -142.4 ! ! SIEMENS AG Semiconductor Group, Munich