! SIEMENS Small Signal Semiconductors ! BF840 ! Si NPN RF Bipolar Junction Transistor in SOT23 ! VCE = 10 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 0.9458 -5.9 4.059 175.7 0.0017 87.1 0.9989 -0.6 0.020 0.9390 -11.8 4.023 171.4 0.0035 80.3 0.9987 -1.1 0.050 0.9097 -28.5 3.825 159.3 0.0079 74.9 0.9939 -2.5 0.100 0.8302 -53.2 3.374 142.4 0.0135 63.5 0.9811 -4.5 0.150 0.7565 -73.8 2.932 129.2 0.0172 56.4 0.9693 -6.1 0.200 0.6944 -90.5 2.535 118.2 0.0194 52.2 0.9607 -7.4 0.250 0.6512 -104.6 2.212 109.4 0.0205 50.0 0.9547 -8.8 0.300 0.6222 -115.8 1.951 102.1 0.0211 50.0 0.9472 -9.9 0.400 0.5851 -133.8 1.556 90.4 0.0213 54.7 0.9415 -12.5 0.500 0.5728 -146.7 1.290 80.8 0.0218 63.3 0.9369 -15.1 0.600 0.5654 -157.4 1.095 72.6 0.0233 76.1 0.9344 -17.8 0.700 0.5649 -166.0 0.951 65.5 0.0272 88.4 0.9312 -20.5 0.800 0.5713 -173.3 0.837 59.0 0.0327 98.7 0.9297 -23.3 0.900 0.5806 -179.9 0.745 53.1 0.0405 106.4 0.9265 -26.2 1.000 0.5861 174.0 0.669 47.7 0.0504 111.0 0.9238 -29.2 1.100 0.5971 168.2 0.604 42.9 0.0620 114.0 0.9221 -32.3 1.200 0.6108 163.0 0.545 38.8 0.0750 115.1 0.9178 -35.3 1.300 0.6154 158.2 0.490 35.1 0.0891 115.4 0.9139 -38.5 1.400 0.6289 153.7 0.450 32.3 0.1047 114.9 0.9102 -41.7 1.500 0.6407 149.0 0.406 29.6 0.1214 113.8 0.9041 -44.9 1.600 0.6464 144.8 0.370 28.2 0.1391 112.2 0.8980 -48.3 1.700 0.6561 140.6 0.334 26.4 0.1579 110.5 0.8930 -51.7 1.800 0.6647 136.8 0.301 27.2 0.1777 108.5 0.8862 -55.1 1.900 0.6746 132.6 0.273 28.1 0.1981 106.2 0.8754 -58.6 2.000 0.6810 128.7 0.250 31.6 0.2187 103.8 0.8677 -62.1 2.200 0.6896 121.1 0.223 38.4 0.2612 98.7 0.8462 -69.3 2.400 0.6969 114.2 0.216 49.0 0.3052 93.1 0.8229 -76.5 2.600 0.7018 107.0 0.240 56.9 0.3477 87.4 0.7950 -83.8 2.800 0.7035 101.1 0.275 61.5 0.3893 81.7 0.7685 -91.2 3.000 0.6972 95.0 0.313 63.4 0.4278 76.1 0.7374 -98.6 ! ! SIEMENS AG Semiconductor Group, Munich