! SIEMENS Small Signal Semiconductors ! BF840 ! Si NPN RF Bipolar Junction Transistor in SOT23 ! VCE = 15 V IC = 15 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 0.6602 -39.3 19.297 156.8 0.0015 74.3 0.9835 -1.3 0.020 0.6171 -70.2 16.102 139.4 0.0025 60.0 0.9710 -2.0 0.050 0.5465 -118.8 9.263 113.3 0.0038 52.1 0.9496 -2.5 0.100 0.5337 -145.9 5.106 97.3 0.0048 55.3 0.9420 -3.3 0.150 0.5456 -156.8 3.489 88.9 0.0061 65.7 0.9397 -4.5 0.200 0.5586 -163.4 2.636 82.2 0.0070 71.5 0.9388 -5.7 0.250 0.5740 -168.2 2.105 76.9 0.0083 80.7 0.9387 -6.9 0.300 0.5849 -172.0 1.750 72.1 0.0095 87.5 0.9368 -8.1 0.400 0.6053 -178.8 1.298 63.7 0.0127 100.5 0.9377 -10.7 0.500 0.6256 175.7 1.027 56.0 0.0172 110.1 0.9376 -13.3 0.600 0.6400 170.7 0.841 49.0 0.0232 116.9 0.9366 -16.1 0.700 0.6520 166.1 0.706 42.6 0.0311 121.3 0.9350 -18.7 0.800 0.6678 161.6 0.604 36.1 0.0395 123.6 0.9331 -21.5 0.900 0.6803 157.5 0.521 30.6 0.0493 124.8 0.9306 -24.5 1.000 0.6891 153.4 0.451 25.2 0.0610 124.5 0.9278 -27.3 1.100 0.7020 149.3 0.392 20.2 0.0737 124.0 0.9253 -30.4 1.200 0.7148 145.3 0.336 16.4 0.0872 122.8 0.9213 -33.3 1.300 0.7217 141.6 0.286 13.1 0.1020 121.3 0.9157 -36.4 1.400 0.7319 138.0 0.243 11.6 0.1179 119.4 0.9118 -39.5 1.500 0.7412 134.2 0.201 10.3 0.1339 117.4 0.9036 -42.6 1.600 0.7456 130.4 0.163 12.7 0.1514 115.0 0.8965 -45.9 1.700 0.7522 127.2 0.132 15.9 0.1700 112.6 0.8893 -49.1 1.800 0.7586 123.3 0.103 28.0 0.1884 110.0 0.8808 -52.3 1.900 0.7628 120.1 0.091 43.6 0.2077 107.3 0.8684 -55.6 2.000 0.7623 116.6 0.094 64.4 0.2272 104.7 0.8589 -58.9 2.200 0.7651 109.9 0.132 84.1 0.2673 99.2 0.8345 -65.5 2.400 0.7632 103.4 0.189 90.0 0.3067 93.3 0.8065 -72.2 2.600 0.7585 97.2 0.246 88.0 0.3457 87.6 0.7777 -79.0 2.800 0.7516 91.7 0.303 84.1 0.3830 82.1 0.7488 -85.7 3.000 0.7409 86.4 0.354 80.0 0.4182 76.6 0.7175 -92.3 ! ! SIEMENS AG Semiconductor Group, Munich