! SIEMENS Small Signal Semiconductors ! BF840 ! Si NPN RF Bipolar Junction Transistor in SOT23 ! VCE = 12 V IC = 1.2 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 0.9470 -5.9 4.049 175.8 0.0015 88.5 0.9989 -0.5 0.020 0.9408 -11.8 4.013 171.5 0.0033 80.0 0.9984 -0.9 0.050 0.9092 -28.3 3.820 159.5 0.0073 75.3 0.9943 -2.4 0.100 0.8325 -52.7 3.374 142.7 0.0129 63.7 0.9823 -4.3 0.150 0.7594 -73.1 2.938 129.6 0.0165 56.5 0.9703 -5.8 0.200 0.6949 -89.9 2.542 118.6 0.0186 51.9 0.9629 -7.2 0.250 0.6518 -103.9 2.220 109.7 0.0196 50.7 0.9562 -8.4 0.300 0.6212 -115.0 1.959 102.5 0.0202 50.3 0.9500 -9.6 0.400 0.5852 -133.0 1.565 90.8 0.0204 54.7 0.9451 -12.1 0.500 0.5705 -146.2 1.298 81.2 0.0210 63.7 0.9409 -14.6 0.600 0.5626 -156.8 1.099 73.1 0.0222 76.1 0.9377 -17.2 0.700 0.5634 -165.7 0.957 66.0 0.0260 89.3 0.9351 -19.8 0.800 0.5711 -173.0 0.841 59.4 0.0313 99.9 0.9336 -22.5 0.900 0.5775 -179.8 0.749 53.5 0.0387 107.4 0.9307 -25.3 1.000 0.5851 174.4 0.672 48.2 0.0485 112.0 0.9294 -28.2 1.100 0.5963 168.5 0.607 43.2 0.0595 115.0 0.9282 -31.1 1.200 0.6093 163.2 0.549 39.0 0.0721 116.2 0.9254 -34.1 1.300 0.6142 158.6 0.492 35.2 0.0860 116.7 0.9211 -37.2 1.400 0.6259 153.9 0.452 32.3 0.1011 116.4 0.9178 -40.3 1.500 0.6379 149.3 0.411 29.8 0.1177 115.3 0.9141 -43.4 1.600 0.6459 144.9 0.371 27.9 0.1345 113.7 0.9081 -46.7 1.700 0.6559 140.8 0.334 26.4 0.1530 112.0 0.9023 -50.0 1.800 0.6663 136.9 0.299 27.0 0.1719 110.1 0.8972 -53.3 1.900 0.6722 133.0 0.274 26.7 0.1926 107.9 0.8870 -56.7 2.000 0.6799 128.9 0.248 31.0 0.2128 105.4 0.8799 -60.1 2.200 0.6888 121.3 0.220 37.3 0.2552 100.5 0.8606 -67.1 2.400 0.6974 114.2 0.211 47.9 0.2983 94.8 0.8383 -74.1 2.600 0.7038 107.2 0.232 57.0 0.3415 89.1 0.8128 -81.4 2.800 0.7084 101.2 0.267 62.4 0.3837 83.6 0.7874 -88.6 3.000 0.7036 94.9 0.307 64.3 0.4228 77.9 0.7573 -95.9 ! ! SIEMENS AG Semiconductor Group, Munich