! SIEMENS Small Signal Semiconductors ! BF840 ! Si NPN RF Bipolar Junction Transistor in SOT23 ! VCE = 2.5 V IC = 2.5 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 0.8888 -10.5 7.734 172.8 0.0024 84.2 0.9975 -1.0 0.020 0.8751 -20.9 7.544 165.7 0.0050 78.7 0.9939 -2.0 0.050 0.8134 -48.9 6.701 147.2 0.0107 66.1 0.9741 -4.4 0.100 0.7013 -84.5 5.144 125.3 0.0161 52.6 0.9421 -6.8 0.150 0.6373 -108.3 3.991 111.3 0.0185 48.4 0.9234 -8.3 0.200 0.5974 -124.6 3.195 101.2 0.0197 48.3 0.9126 -9.8 0.250 0.5807 -136.1 2.651 93.5 0.0208 51.1 0.9061 -11.3 0.300 0.5722 -144.8 2.258 87.2 0.0215 54.3 0.9001 -12.8 0.400 0.5648 -157.7 1.730 76.9 0.0233 64.9 0.8941 -16.2 0.500 0.5691 -166.7 1.398 68.0 0.0269 76.6 0.8897 -19.6 0.600 0.5764 -174.0 1.164 60.4 0.0323 87.4 0.8842 -23.2 0.700 0.5859 179.7 0.998 53.4 0.0403 95.9 0.8773 -26.9 0.800 0.6002 174.0 0.867 47.1 0.0500 101.6 0.8721 -30.7 0.900 0.6107 169.0 0.761 41.4 0.0616 104.8 0.8649 -34.5 1.000 0.6217 164.1 0.674 36.2 0.0756 106.6 0.8576 -38.4 1.100 0.6361 159.5 0.600 31.5 0.0908 107.4 0.8498 -42.3 1.200 0.6500 155.0 0.536 27.9 0.1075 107.0 0.8407 -46.4 1.300 0.6588 150.5 0.474 24.7 0.1253 106.0 0.8297 -50.5 1.400 0.6664 146.7 0.426 22.7 0.1443 104.6 0.8193 -54.6 1.500 0.6792 142.6 0.381 20.9 0.1642 102.6 0.8073 -58.6 1.600 0.6849 138.7 0.342 21.1 0.1845 100.4 0.7944 -62.8 1.700 0.6932 134.9 0.306 21.1 0.2058 98.0 0.7810 -67.0 1.800 0.6993 131.1 0.275 23.9 0.2272 95.6 0.7667 -71.2 1.900 0.7037 127.8 0.256 26.5 0.2493 92.9 0.7494 -75.4 2.000 0.7080 124.1 0.239 32.7 0.2708 90.1 0.7356 -79.6 2.200 0.7106 117.2 0.233 41.4 0.3141 84.5 0.7030 -88.1 2.400 0.7097 110.3 0.248 49.9 0.3556 78.7 0.6693 -96.4 2.600 0.7087 104.1 0.287 54.1 0.3938 73.0 0.6356 -104.8 2.800 0.7071 98.6 0.327 55.7 0.4307 67.5 0.6051 -113.2 3.000 0.7000 93.3 0.366 54.9 0.4629 62.0 0.5744 -121.5 ! ! SIEMENS AG Semiconductor Group, Munich