! SIEMENS Small Signal Semiconductors ! BF840 ! Si NPN RF Bipolar Junction Transistor in SOT23 ! VCE = 3.5 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 0.9436 -6.3 4.088 175.4 0.0022 88.0 0.9983 -0.7 0.020 0.9377 -12.4 4.052 170.9 0.0046 81.3 0.9981 -1.4 0.050 0.9034 -30.1 3.835 158.2 0.0105 74.4 0.9913 -3.2 0.100 0.8239 -55.9 3.351 140.6 0.0180 61.7 0.9740 -5.8 0.150 0.7483 -77.2 2.888 126.9 0.0227 54.2 0.9574 -7.7 0.200 0.6890 -94.2 2.478 115.7 0.0254 50.0 0.9460 -9.4 0.250 0.6499 -108.0 2.151 106.8 0.0269 47.6 0.9368 -11.0 0.300 0.6217 -119.3 1.891 99.3 0.0279 47.2 0.9281 -12.5 0.400 0.5879 -136.7 1.503 87.4 0.0280 51.5 0.9202 -15.7 0.500 0.5782 -149.5 1.243 77.5 0.0286 59.8 0.9125 -18.9 0.600 0.5730 -159.6 1.051 69.2 0.0306 71.2 0.9071 -22.2 0.700 0.5767 -168.0 0.912 61.9 0.0352 83.4 0.9003 -25.5 0.800 0.5823 -175.2 0.802 55.3 0.0421 92.5 0.8949 -29.0 0.900 0.5911 178.6 0.713 49.3 0.0517 99.3 0.8875 -32.6 1.000 0.5983 172.7 0.638 44.2 0.0637 103.4 0.8820 -36.2 1.100 0.6087 166.9 0.575 39.2 0.0773 105.9 0.8754 -39.9 1.200 0.6213 161.7 0.517 35.4 0.0925 106.6 0.8673 -43.5 1.300 0.6262 157.1 0.465 32.1 0.1092 106.8 0.8575 -47.4 1.400 0.6386 152.7 0.425 30.0 0.1272 105.8 0.8491 -51.1 1.500 0.6490 148.0 0.384 27.9 0.1458 104.5 0.8385 -55.0 1.600 0.6538 144.0 0.351 27.3 0.1655 102.6 0.8265 -59.0 1.700 0.6606 139.6 0.317 26.9 0.1864 100.6 0.8160 -62.9 1.800 0.6685 135.9 0.290 29.1 0.2074 98.4 0.8031 -66.9 1.900 0.6765 132.0 0.269 31.0 0.2288 96.0 0.7872 -70.8 2.000 0.6835 128.0 0.252 34.6 0.2503 93.5 0.7747 -74.8 2.200 0.6860 120.5 0.243 41.6 0.2943 88.0 0.7450 -82.9 2.400 0.6890 113.7 0.251 49.8 0.3369 82.5 0.7133 -91.0 2.600 0.6940 107.3 0.283 54.0 0.3770 76.8 0.6807 -99.1 2.800 0.6905 101.5 0.320 56.0 0.4159 71.2 0.6511 -107.2 3.000 0.6859 95.7 0.357 55.9 0.4504 65.8 0.6187 -115.2 ! ! SIEMENS AG Semiconductor Group, Munich