! SIEMENS Small Signal Semiconductors ! BF840 ! Si NPN RF Bipolar Junction Transistor in SOT23 ! VCE = 1.75 V IC = 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 0.9088 -9.2 6.421 173.5 0.0027 85.7 0.9970 -1.0 0.020 0.8967 -18.5 6.277 167.0 0.0058 79.5 0.9943 -2.1 0.050 0.8415 -43.6 5.693 150.0 0.0126 67.2 0.9764 -4.6 0.100 0.7357 -76.9 4.542 128.8 0.0195 54.0 0.9445 -7.4 0.150 0.6631 -100.6 3.617 114.4 0.0231 48.3 0.9221 -9.3 0.200 0.6161 -117.8 2.942 103.8 0.0249 46.2 0.9093 -10.9 0.250 0.5958 -130.1 2.461 95.6 0.0259 47.2 0.9006 -12.6 0.300 0.5818 -139.6 2.110 88.9 0.0266 49.7 0.8930 -14.3 0.400 0.5699 -153.6 1.626 77.9 0.0282 57.9 0.8846 -17.9 0.500 0.5719 -163.4 1.320 68.6 0.0310 68.4 0.8772 -21.6 0.600 0.5777 -171.2 1.105 60.5 0.0357 79.7 0.8695 -25.5 0.700 0.5859 -177.9 0.948 53.4 0.0436 88.7 0.8611 -29.4 0.800 0.5966 176.1 0.825 47.0 0.0532 94.9 0.8534 -33.4 0.900 0.6082 170.8 0.727 41.1 0.0653 99.0 0.8434 -37.6 1.000 0.6170 165.9 0.643 35.8 0.0793 101.2 0.8350 -41.6 1.100 0.6294 160.8 0.573 31.1 0.0951 102.4 0.8248 -45.8 1.200 0.6429 156.2 0.511 27.4 0.1120 102.2 0.8134 -50.1 1.300 0.6496 152.1 0.453 24.6 0.1302 101.3 0.7997 -54.4 1.400 0.6617 148.1 0.410 22.8 0.1494 100.1 0.7877 -58.6 1.500 0.6729 143.8 0.368 21.5 0.1697 98.3 0.7740 -62.9 1.600 0.6793 139.8 0.331 22.0 0.1906 96.1 0.7585 -67.4 1.700 0.6850 136.1 0.297 21.9 0.2120 93.8 0.7441 -71.7 1.800 0.6885 132.4 0.272 25.3 0.2333 91.4 0.7279 -76.1 1.900 0.6945 128.6 0.252 29.0 0.2553 88.7 0.7099 -80.5 2.000 0.6985 125.0 0.241 34.7 0.2764 86.2 0.6942 -84.8 2.200 0.7030 117.8 0.240 42.4 0.3187 80.7 0.6605 -93.6 2.400 0.7020 111.4 0.263 49.7 0.3601 75.0 0.6273 -102.2 2.600 0.7001 105.3 0.297 53.3 0.3971 69.4 0.5936 -110.9 2.800 0.6983 100.0 0.337 53.4 0.4326 64.1 0.5646 -119.5 3.000 0.6902 94.7 0.375 52.3 0.4626 58.8 0.5343 -127.9 ! ! SIEMENS AG Semiconductor Group, Munich