! SIEMENS Small Signal Semiconductors ! BF840 ! Si NPN RF Bipolar Junction Transistor in SOT23 ! VCE = 10 V IC = 2 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 0.9155 -8.2 6.342 174.2 0.0016 86.1 0.9989 -0.6 0.020 0.9059 -16.4 6.235 168.5 0.0033 82.2 0.9969 -1.2 0.050 0.8586 -38.9 5.734 153.0 0.0074 70.6 0.9879 -2.9 0.100 0.7518 -69.8 4.713 133.1 0.0119 57.9 0.9687 -4.8 0.150 0.6757 -93.0 3.837 119.2 0.0143 52.7 0.9563 -6.2 0.200 0.6190 -110.2 3.162 108.7 0.0154 50.6 0.9468 -7.3 0.250 0.5899 -123.1 2.666 100.7 0.0163 51.6 0.9424 -8.5 0.300 0.5736 -133.1 2.299 94.2 0.0166 54.6 0.9369 -9.6 0.400 0.5552 -148.4 1.783 83.7 0.0174 64.4 0.9335 -12.2 0.500 0.5547 -159.0 1.454 75.0 0.0194 76.0 0.9313 -14.7 0.600 0.5548 -167.7 1.219 67.4 0.0228 88.9 0.9291 -17.4 0.700 0.5640 -174.9 1.051 60.6 0.0284 99.4 0.9273 -20.2 0.800 0.5739 179.1 0.918 54.4 0.0351 106.6 0.9259 -22.9 0.900 0.5851 173.3 0.812 48.7 0.0437 111.9 0.9234 -25.9 1.000 0.5972 168.1 0.727 43.7 0.0541 114.9 0.9216 -28.8 1.100 0.6069 162.9 0.650 38.8 0.0663 116.7 0.9189 -31.9 1.200 0.6234 158.3 0.586 34.6 0.0795 116.9 0.9168 -35.0 1.300 0.6303 153.8 0.522 30.6 0.0939 116.8 0.9129 -38.2 1.400 0.6427 149.8 0.473 28.1 0.1097 116.0 0.9086 -41.4 1.500 0.6559 145.4 0.428 25.2 0.1267 114.6 0.9053 -44.7 1.600 0.6622 141.5 0.387 23.3 0.1443 112.8 0.8984 -48.1 1.700 0.6741 137.6 0.345 22.0 0.1632 111.0 0.8926 -51.5 1.800 0.6831 133.6 0.307 22.4 0.1829 108.7 0.8857 -54.9 1.900 0.6903 130.1 0.277 23.3 0.2034 106.4 0.8744 -58.5 2.000 0.6969 126.2 0.251 26.6 0.2240 103.9 0.8669 -61.9 2.200 0.7046 118.7 0.216 34.1 0.2669 98.7 0.8456 -69.1 2.400 0.7134 111.8 0.210 45.5 0.3104 93.0 0.8212 -76.4 2.600 0.7150 105.3 0.232 56.0 0.3528 87.2 0.7942 -83.8 2.800 0.7164 99.4 0.269 61.4 0.3947 81.5 0.7682 -91.1 3.000 0.7140 93.2 0.307 63.5 0.4324 75.8 0.7364 -98.6 ! ! SIEMENS AG Semiconductor Group, Munich