! SIEMENS Small Signal Semiconductors ! BF840 ! Si NPN RF Bipolar Junction Transistor in SOT23 ! VCE = 25 V IC = 4 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 0.8805 -11.5 10.521 171.9 0.0013 85.1 0.9970 -0.6 0.020 0.8640 -22.7 10.224 164.2 0.0026 77.6 0.9959 -1.3 0.050 0.7859 -52.6 8.875 144.3 0.0054 66.0 0.9815 -2.7 0.100 0.6571 -88.6 6.529 122.2 0.0079 54.2 0.9614 -4.0 0.150 0.5881 -111.8 4.933 109.0 0.0091 54.1 0.9517 -4.9 0.200 0.5511 -127.0 3.891 99.8 0.0098 56.5 0.9479 -5.8 0.250 0.5362 -137.9 3.196 92.9 0.0107 61.6 0.9447 -6.7 0.300 0.5280 -145.9 2.708 87.2 0.0111 66.3 0.9416 -7.6 0.400 0.5245 -158.4 2.057 77.9 0.0129 77.7 0.9426 -9.7 0.500 0.5320 -166.6 1.654 69.9 0.0155 90.1 0.9428 -11.9 0.600 0.5429 -173.8 1.372 62.9 0.0192 100.8 0.9421 -14.2 0.700 0.5544 180.0 1.173 56.4 0.0246 108.7 0.9422 -16.6 0.800 0.5679 174.5 1.020 50.5 0.0305 115.3 0.9440 -18.9 0.900 0.5823 169.6 0.899 44.8 0.0381 119.1 0.9439 -21.4 1.000 0.5952 164.8 0.796 39.7 0.0474 121.6 0.9445 -23.9 1.100 0.6120 160.2 0.712 34.7 0.0575 122.8 0.9451 -26.6 1.200 0.6304 155.6 0.636 30.1 0.0687 123.4 0.9451 -29.1 1.300 0.6370 151.5 0.567 25.9 0.0816 123.2 0.9438 -32.0 1.400 0.6512 147.7 0.512 23.0 0.0954 122.5 0.9437 -34.7 1.500 0.6632 143.5 0.460 19.3 0.1101 121.4 0.9420 -37.5 1.600 0.6728 139.7 0.412 16.4 0.1263 119.6 0.9384 -40.5 1.700 0.6852 136.1 0.366 13.8 0.1427 117.8 0.9368 -43.4 1.800 0.6957 132.1 0.321 12.7 0.1604 115.9 0.9339 -46.4 1.900 0.7064 128.7 0.281 11.6 0.1791 113.7 0.9272 -49.5 2.000 0.7135 124.8 0.246 13.1 0.1983 111.4 0.9236 -52.5 2.200 0.7242 117.6 0.189 19.3 0.2383 106.4 0.9091 -58.9 2.400 0.7360 110.7 0.153 34.5 0.2798 101.0 0.8926 -65.3 2.600 0.7431 103.7 0.159 54.9 0.3214 95.3 0.8724 -72.1 2.800 0.7454 97.8 0.196 67.7 0.3632 89.8 0.8504 -78.7 3.000 0.7400 91.7 0.242 73.0 0.4025 84.2 0.8238 -85.4 ! ! SIEMENS AG Semiconductor Group, Munich