! SIEMENS Small Signal Semiconductors ! BF840 ! Si NPN RF Bipolar Junction Transistor in SOT23 ! VCE = 2.5 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 0.8691 -12.1 8.982 171.8 0.0024 86.0 0.9965 -1.2 0.020 0.8533 -23.7 8.695 163.9 0.0049 75.3 0.9917 -2.2 0.050 0.7832 -55.0 7.530 143.8 0.0103 63.4 0.9686 -4.7 0.100 0.6719 -92.5 5.550 121.4 0.0149 51.2 0.9344 -6.8 0.150 0.6156 -116.0 4.202 107.8 0.0169 48.5 0.9163 -8.2 0.200 0.5841 -131.4 3.318 98.1 0.0182 49.4 0.9075 -9.6 0.250 0.5736 -141.9 2.730 90.8 0.0193 52.7 0.9017 -11.1 0.300 0.5684 -149.9 2.316 84.7 0.0200 57.3 0.8969 -12.7 0.400 0.5667 -161.7 1.763 74.7 0.0224 68.9 0.8910 -16.0 0.500 0.5742 -169.7 1.419 66.0 0.0264 80.4 0.8869 -19.5 0.600 0.5828 -176.7 1.179 58.5 0.0324 90.8 0.8817 -23.2 0.700 0.5936 177.5 1.007 51.6 0.0409 98.3 0.8754 -26.9 0.800 0.6077 172.0 0.871 45.3 0.0508 103.5 0.8702 -30.5 0.900 0.6195 167.2 0.764 39.6 0.0630 106.5 0.8633 -34.4 1.000 0.6316 162.6 0.675 34.7 0.0771 107.9 0.8558 -38.4 1.100 0.6434 158.0 0.599 29.9 0.0925 108.4 0.8492 -42.4 1.200 0.6595 153.6 0.533 26.0 0.1095 107.7 0.8400 -46.4 1.300 0.6666 149.4 0.469 23.2 0.1276 106.6 0.8290 -50.5 1.400 0.6773 145.6 0.422 21.5 0.1470 105.1 0.8186 -54.6 1.500 0.6870 141.4 0.375 19.6 0.1663 103.0 0.8065 -58.7 1.600 0.6958 137.7 0.335 19.5 0.1872 100.7 0.7923 -62.9 1.700 0.7010 134.0 0.298 19.9 0.2085 98.2 0.7799 -67.1 1.800 0.7087 130.2 0.269 23.5 0.2300 95.7 0.7652 -71.3 1.900 0.7138 126.8 0.247 26.8 0.2520 92.9 0.7481 -75.6 2.000 0.7152 123.1 0.232 32.4 0.2734 90.2 0.7338 -79.8 2.200 0.7191 116.0 0.228 42.1 0.3170 84.5 0.7009 -88.3 2.400 0.7174 109.6 0.247 51.0 0.3583 78.7 0.6671 -96.6 2.600 0.7154 103.5 0.286 55.0 0.3966 72.8 0.6331 -105.1 2.800 0.7090 97.8 0.327 56.1 0.4330 67.3 0.6026 -113.4 3.000 0.7015 92.8 0.368 55.6 0.4646 61.9 0.5709 -121.7 ! ! SIEMENS AG Semiconductor Group, Munich