! SIEMENS Small Signal Semiconductors ! BF840 ! Si NPN RF Bipolar Junction Transistor in SOT23 ! VCE = 3 V IC = 0.3 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 0.9838 -2.8 1.146 177.7 0.0024 88.2 0.9992 -0.4 0.020 0.9804 -5.9 1.139 175.2 0.0049 85.7 0.9996 -1.0 0.050 0.9724 -14.3 1.121 168.0 0.0117 82.3 0.9981 -2.4 0.100 0.9460 -27.6 1.077 156.9 0.0223 73.8 0.9937 -4.7 0.150 0.9147 -40.3 1.031 147.0 0.0317 67.7 0.9888 -7.0 0.200 0.8786 -52.1 0.976 137.2 0.0392 61.3 0.9818 -9.1 0.250 0.8443 -63.3 0.926 128.2 0.0453 56.2 0.9745 -11.1 0.300 0.8112 -73.5 0.876 120.2 0.0495 51.6 0.9658 -13.0 0.400 0.7523 -92.1 0.776 105.8 0.0540 45.4 0.9534 -16.7 0.500 0.7098 -108.0 0.693 93.4 0.0551 41.9 0.9420 -20.3 0.600 0.6748 -121.9 0.619 82.9 0.0532 42.1 0.9318 -23.9 0.700 0.6551 -134.3 0.561 73.8 0.0506 45.7 0.9209 -27.5 0.800 0.6423 -144.9 0.507 66.1 0.0484 53.0 0.9125 -31.1 0.900 0.6354 -154.5 0.464 59.7 0.0485 63.5 0.9023 -34.8 1.000 0.6297 -163.1 0.424 53.8 0.0524 75.2 0.8930 -38.5 1.100 0.6310 -171.4 0.390 48.9 0.0607 85.2 0.8821 -42.3 1.200 0.6356 -179.0 0.359 45.3 0.0726 92.2 0.8726 -46.1 1.300 0.6317 174.7 0.328 42.9 0.0876 96.3 0.8601 -50.0 1.400 0.6395 168.6 0.304 41.6 0.1049 98.4 0.8498 -53.9 1.500 0.6434 162.4 0.285 40.8 0.1232 99.0 0.8372 -57.7 1.600 0.6470 157.2 0.267 41.2 0.1433 98.3 0.8234 -61.8 1.700 0.6502 151.9 0.252 42.1 0.1640 97.3 0.8097 -65.7 1.800 0.6565 147.0 0.240 44.3 0.1856 95.8 0.7955 -69.8 1.900 0.6596 142.6 0.233 47.3 0.2076 93.7 0.7782 -73.8 2.000 0.6600 137.8 0.233 52.0 0.2296 91.5 0.7643 -77.7 2.200 0.6625 129.2 0.246 55.7 0.2743 86.6 0.7322 -85.9 2.400 0.6658 121.4 0.269 59.7 0.3187 81.3 0.7001 -93.9 2.600 0.6660 114.1 0.305 59.8 0.3599 75.7 0.6668 -102.0 2.800 0.6656 107.7 0.341 59.5 0.3989 70.4 0.6360 -110.1 3.000 0.6604 101.5 0.376 57.4 0.4348 65.0 0.6041 -118.2 ! ! SIEMENS AG Semiconductor Group, Munich