! SIEMENS Small Signal Semiconductors ! BF840 ! Si NPN RF Bipolar Junction Transistor in SOT23 ! VCE = 1.75 V IC = 1 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 0.9522 -5.8 3.474 175.7 0.0028 87.2 0.9989 -0.7 0.020 0.9453 -11.6 3.440 171.4 0.0057 83.4 0.9980 -1.6 0.050 0.9156 -28.1 3.281 159.2 0.0135 75.1 0.9905 -3.8 0.100 0.8421 -52.4 2.909 142.1 0.0236 62.2 0.9721 -6.7 0.150 0.7744 -72.9 2.541 128.4 0.0301 54.3 0.9536 -9.2 0.200 0.7100 -89.7 2.207 116.9 0.0339 48.7 0.9379 -11.2 0.250 0.6693 -103.6 1.933 107.5 0.0364 45.6 0.9263 -13.1 0.300 0.6401 -115.1 1.709 99.7 0.0373 44.4 0.9156 -14.9 0.400 0.6037 -133.1 1.371 87.0 0.0376 46.0 0.9025 -18.6 0.500 0.5886 -146.2 1.139 76.5 0.0380 52.0 0.8919 -22.2 0.600 0.5828 -156.9 0.968 67.6 0.0390 61.3 0.8820 -26.2 0.700 0.5831 -165.6 0.841 59.9 0.0427 72.4 0.8719 -30.0 0.800 0.5894 -173.3 0.741 52.9 0.0493 81.8 0.8629 -34.0 0.900 0.5960 -179.8 0.659 46.9 0.0589 89.2 0.8526 -38.0 1.000 0.6021 174.3 0.589 41.6 0.0715 94.1 0.8409 -42.1 1.100 0.6117 168.4 0.528 37.2 0.0862 97.1 0.8301 -46.2 1.200 0.6246 163.1 0.478 33.3 0.1022 98.3 0.8193 -50.3 1.300 0.6283 158.2 0.429 30.4 0.1199 98.3 0.8043 -54.7 1.400 0.6390 153.8 0.394 28.9 0.1389 97.8 0.7930 -58.8 1.500 0.6493 148.9 0.357 27.2 0.1585 96.6 0.7785 -63.0 1.600 0.6525 144.8 0.327 27.6 0.1790 94.7 0.7631 -67.4 1.700 0.6623 140.6 0.299 27.8 0.2000 92.7 0.7485 -71.7 1.800 0.6636 136.4 0.278 30.4 0.2212 90.6 0.7327 -76.0 1.900 0.6723 132.9 0.261 33.0 0.2431 88.3 0.7143 -80.3 2.000 0.6730 128.7 0.253 37.4 0.2643 85.8 0.6994 -84.6 2.200 0.6773 121.5 0.252 43.6 0.3070 80.6 0.6653 -93.3 2.400 0.6808 114.6 0.269 49.4 0.3485 75.1 0.6327 -101.8 2.600 0.6831 108.1 0.304 52.1 0.3863 69.7 0.5998 -110.4 2.800 0.6808 102.8 0.341 52.6 0.4225 64.5 0.5710 -118.9 3.000 0.6745 97.2 0.374 52.1 0.4539 59.2 0.5414 -127.4 ! ! SIEMENS AG Semiconductor Group, Munich