! SIEMENS Small Signal Semiconductors ! BF840 ! Si NPN RF Bipolar Junction Transistor in SOT23 ! VCE = 1 V IC = 0.5 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 0.9740 -4.0 1.826 176.8 0.0035 87.9 0.9998 -0.7 0.020 0.9687 -7.9 1.816 173.6 0.0072 83.7 0.9993 -1.5 0.050 0.9547 -19.6 1.773 164.2 0.0171 78.9 0.9948 -3.6 0.100 0.9099 -37.3 1.659 150.1 0.0319 68.2 0.9832 -6.9 0.150 0.8617 -53.3 1.537 137.8 0.0435 59.9 0.9691 -9.9 0.200 0.8089 -67.8 1.406 126.4 0.0518 53.2 0.9545 -12.5 0.250 0.7668 -81.0 1.289 116.5 0.0577 47.7 0.9399 -15.1 0.300 0.7299 -92.2 1.185 107.8 0.0612 43.8 0.9258 -17.3 0.400 0.6743 -111.5 0.998 93.1 0.0639 38.8 0.9061 -21.7 0.500 0.6439 -126.9 0.856 80.8 0.0633 37.7 0.8884 -26.0 0.600 0.6228 -140.0 0.746 70.5 0.0611 40.0 0.8730 -30.4 0.700 0.6132 -150.7 0.660 61.8 0.0595 46.1 0.8569 -34.6 0.800 0.6097 -159.9 0.589 54.3 0.0598 54.5 0.8426 -39.1 0.900 0.6099 -168.1 0.530 47.8 0.0637 64.3 0.8273 -43.5 1.000 0.6125 -175.4 0.479 42.3 0.0716 72.7 0.8114 -47.9 1.100 0.6192 177.5 0.434 38.0 0.0831 79.6 0.7954 -52.5 1.200 0.6279 171.2 0.394 34.4 0.0978 83.8 0.7805 -57.0 1.300 0.6281 166.0 0.357 32.2 0.1146 86.1 0.7627 -61.5 1.400 0.6370 160.6 0.330 31.1 0.1333 87.1 0.7468 -66.1 1.500 0.6431 155.3 0.304 30.6 0.1528 87.0 0.7289 -70.5 1.600 0.6461 150.7 0.285 31.4 0.1733 86.1 0.7102 -75.2 1.700 0.6532 146.0 0.265 32.2 0.1942 84.9 0.6936 -79.7 1.800 0.6544 141.9 0.254 35.9 0.2155 83.1 0.6754 -84.3 1.900 0.6610 137.6 0.246 38.3 0.2370 81.3 0.6557 -88.8 2.000 0.6631 133.5 0.247 42.9 0.2584 79.2 0.6396 -93.2 2.200 0.6644 125.8 0.259 47.6 0.3004 74.5 0.6049 -102.3 2.400 0.6701 118.7 0.282 50.9 0.3409 69.5 0.5718 -111.2 2.600 0.6657 112.2 0.318 51.6 0.3774 64.5 0.5403 -120.1 2.800 0.6670 106.3 0.352 51.4 0.4114 59.6 0.5130 -128.8 3.000 0.6667 100.7 0.383 49.2 0.4423 54.7 0.4869 -137.5 ! ! SIEMENS AG Semiconductor Group, Munich