! SIEMENS Small Signal Semiconductors ! BF840 ! Si NPN RF Bipolar Junction Transistor in SOT23 ! VCE = 25 V IC = 2.5 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 0.9148 -8.6 7.372 173.8 0.0013 89.4 0.9982 -0.5 0.020 0.9045 -17.1 7.235 167.8 0.0026 79.7 0.9970 -1.0 0.050 0.8484 -40.6 6.608 151.6 0.0059 69.4 0.9885 -2.4 0.100 0.7327 -72.4 5.328 131.1 0.0090 57.9 0.9722 -4.0 0.150 0.6495 -95.6 4.266 117.3 0.0108 53.8 0.9600 -5.0 0.200 0.5957 -112.3 3.480 107.0 0.0118 52.9 0.9544 -6.0 0.250 0.5683 -125.1 2.915 99.3 0.0125 55.2 0.9505 -7.0 0.300 0.5502 -134.5 2.499 93.1 0.0129 58.5 0.9472 -7.9 0.400 0.5351 -149.2 1.927 83.0 0.0138 69.2 0.9452 -10.0 0.500 0.5337 -159.5 1.567 74.5 0.0157 81.8 0.9447 -12.2 0.600 0.5367 -168.0 1.311 67.1 0.0188 94.1 0.9441 -14.4 0.700 0.5471 -174.9 1.126 60.5 0.0236 104.2 0.9438 -16.7 0.800 0.5591 179.0 0.983 54.4 0.0292 111.7 0.9442 -19.0 0.900 0.5692 173.4 0.869 48.6 0.0365 116.2 0.9444 -21.6 1.000 0.5825 168.3 0.776 43.3 0.0454 119.4 0.9447 -24.1 1.100 0.5954 163.4 0.696 38.2 0.0554 121.7 0.9459 -26.7 1.200 0.6111 158.6 0.625 33.7 0.0665 122.3 0.9444 -29.3 1.300 0.6200 154.4 0.558 29.8 0.0789 122.4 0.9433 -32.0 1.400 0.6340 150.2 0.509 26.3 0.0927 121.8 0.9430 -34.8 1.500 0.6479 145.8 0.458 22.9 0.1071 120.9 0.9418 -37.6 1.600 0.6574 141.9 0.412 20.2 0.1228 119.3 0.9381 -40.5 1.700 0.6696 137.9 0.366 17.2 0.1396 117.8 0.9372 -43.4 1.800 0.6764 134.2 0.325 16.9 0.1573 115.8 0.9342 -46.4 1.900 0.6890 130.5 0.287 15.5 0.1758 113.8 0.9276 -49.5 2.000 0.6985 126.6 0.251 17.3 0.1947 111.5 0.9237 -52.5 2.200 0.7116 119.3 0.201 22.9 0.2348 106.7 0.9106 -58.8 2.400 0.7241 112.2 0.166 35.8 0.2766 101.3 0.8947 -65.3 2.600 0.7297 105.2 0.170 53.1 0.3187 95.8 0.8745 -71.9 2.800 0.7341 99.0 0.204 65.9 0.3604 90.2 0.8534 -78.6 3.000 0.7331 92.8 0.243 71.0 0.4007 84.7 0.8276 -85.3 ! ! SIEMENS AG Semiconductor Group, Munich