! SIEMENS Small Signal Semiconductors ! BF840 ! Si NPN RF Bipolar Junction Transistor in SOT23 ! VCE = 3.5 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 0.8902 -10.2 7.724 172.9 0.0022 87.3 0.9978 -0.9 0.020 0.8764 -20.3 7.554 166.0 0.0043 77.4 0.9941 -1.9 0.050 0.8158 -47.8 6.733 147.9 0.0096 66.9 0.9773 -4.0 0.100 0.7049 -82.8 5.206 126.2 0.0143 53.7 0.9483 -6.2 0.150 0.6370 -106.7 4.055 112.3 0.0168 49.4 0.9311 -7.7 0.200 0.5972 -123.1 3.257 102.2 0.0180 49.0 0.9219 -9.0 0.250 0.5794 -135.0 2.705 94.6 0.0189 51.7 0.9163 -10.5 0.300 0.5697 -143.6 2.307 88.3 0.0195 55.2 0.9099 -11.8 0.400 0.5615 -156.8 1.770 78.2 0.0210 66.2 0.9054 -15.0 0.500 0.5667 -165.9 1.433 69.4 0.0244 78.6 0.9014 -18.1 0.600 0.5724 -173.5 1.194 61.8 0.0296 89.8 0.8974 -21.6 0.700 0.5817 -179.8 1.023 55.1 0.0371 97.9 0.8929 -25.0 0.800 0.5933 174.5 0.891 48.9 0.0461 104.1 0.8888 -28.4 0.900 0.6058 169.4 0.783 43.2 0.0570 107.6 0.8831 -32.0 1.000 0.6177 164.7 0.694 38.1 0.0703 109.5 0.8779 -35.7 1.100 0.6302 159.8 0.618 33.3 0.0847 110.3 0.8713 -39.4 1.200 0.6438 155.3 0.552 29.4 0.1004 110.1 0.8640 -43.2 1.300 0.6542 151.2 0.490 26.3 0.1177 109.3 0.8544 -47.0 1.400 0.6648 147.2 0.442 24.2 0.1362 107.9 0.8469 -50.9 1.500 0.6742 142.8 0.396 21.8 0.1554 106.1 0.8372 -54.8 1.600 0.6840 139.2 0.357 21.4 0.1753 103.9 0.8247 -58.8 1.700 0.6903 135.2 0.318 21.1 0.1962 101.6 0.8142 -62.7 1.800 0.6985 131.5 0.286 23.2 0.2175 99.1 0.8011 -66.8 1.900 0.7041 128.0 0.262 25.5 0.2390 96.5 0.7851 -70.8 2.000 0.7073 124.1 0.242 30.8 0.2611 93.8 0.7731 -74.8 2.200 0.7122 117.4 0.228 39.9 0.3046 88.2 0.7426 -82.9 2.400 0.7102 110.4 0.240 49.4 0.3468 82.3 0.7100 -91.1 2.600 0.7176 104.4 0.275 55.2 0.3868 76.5 0.6777 -99.3 2.800 0.7106 98.7 0.316 56.8 0.4250 70.8 0.6472 -107.4 3.000 0.7002 93.2 0.351 57.1 0.4587 65.3 0.6147 -115.4 ! ! SIEMENS AG Semiconductor Group, Munich