! SIEMENS Small Signal Semiconductors ! BF840 ! Si NPN RF Bipolar Junction Transistor in SOT23 ! VCE = 2.5 V IC = 1.2 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 0.9440 -6.4 4.096 175.3 0.0025 88.8 0.9990 -0.7 0.020 0.9353 -12.7 4.050 170.7 0.0050 82.1 0.9975 -1.5 0.050 0.9027 -30.7 3.833 157.7 0.0117 73.7 0.9908 -3.5 0.100 0.8213 -56.9 3.339 139.8 0.0200 61.2 0.9701 -6.3 0.150 0.7475 -78.3 2.863 126.1 0.0252 53.5 0.9523 -8.4 0.200 0.6868 -95.3 2.452 114.7 0.0282 48.9 0.9395 -10.2 0.250 0.6479 -109.2 2.123 105.7 0.0297 46.8 0.9288 -11.9 0.300 0.6200 -120.5 1.864 98.2 0.0305 46.4 0.9207 -13.5 0.400 0.5915 -137.8 1.480 86.1 0.0308 50.0 0.9093 -17.0 0.500 0.5793 -150.4 1.222 76.1 0.0317 58.0 0.9012 -20.3 0.600 0.5737 -160.4 1.034 67.7 0.0338 69.3 0.8936 -23.9 0.700 0.5790 -168.5 0.896 60.3 0.0385 80.8 0.8861 -27.5 0.800 0.5859 -175.7 0.787 53.5 0.0458 89.6 0.8791 -31.2 0.900 0.5939 177.8 0.699 47.7 0.0561 96.2 0.8699 -35.0 1.000 0.6010 172.1 0.626 42.3 0.0685 100.2 0.8629 -38.9 1.100 0.6119 166.5 0.563 37.6 0.0827 102.6 0.8548 -42.7 1.200 0.6241 161.4 0.506 33.7 0.0988 103.4 0.8444 -46.6 1.300 0.6288 156.7 0.453 30.6 0.1159 103.2 0.8330 -50.7 1.400 0.6407 152.1 0.415 29.0 0.1344 102.4 0.8231 -54.7 1.500 0.6499 147.7 0.376 27.2 0.1536 101.0 0.8101 -58.7 1.600 0.6559 143.6 0.342 26.7 0.1739 99.1 0.7965 -62.9 1.700 0.6628 139.6 0.311 26.5 0.1950 97.0 0.7840 -67.0 1.800 0.6709 135.5 0.285 29.0 0.2162 94.8 0.7699 -71.2 1.900 0.6757 131.9 0.267 30.9 0.2378 92.4 0.7527 -75.3 2.000 0.6839 127.8 0.251 35.5 0.2590 89.9 0.7388 -79.4 2.200 0.6829 120.7 0.248 42.8 0.3024 84.5 0.7066 -87.8 2.400 0.6879 113.8 0.260 49.2 0.3451 78.8 0.6749 -96.1 2.600 0.6911 107.3 0.295 53.7 0.3837 73.3 0.6406 -104.5 2.800 0.6865 101.6 0.331 54.7 0.4210 67.9 0.6115 -112.7 3.000 0.6822 95.9 0.366 54.2 0.4544 62.5 0.5801 -121.0 ! ! SIEMENS AG Semiconductor Group, Munich