! SIEMENS Small Signal Semiconductors ! BF840 ! Si NPN RF Bipolar Junction Transistor in SOT23 ! VCE = 1 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 0.9420 -6.9 4.090 174.9 0.0036 86.8 0.9976 -1.0 0.020 0.9337 -13.7 4.044 169.9 0.0072 81.3 0.9962 -2.0 0.050 0.8973 -32.9 3.797 155.9 0.0167 72.0 0.9845 -4.7 0.100 0.8105 -60.4 3.260 136.9 0.0283 58.6 0.9552 -8.2 0.150 0.7352 -82.5 2.764 122.5 0.0350 50.2 0.9305 -10.9 0.200 0.6770 -99.8 2.342 110.7 0.0388 45.2 0.9118 -13.1 0.250 0.6414 -113.6 2.014 101.4 0.0408 42.7 0.8981 -15.0 0.300 0.6181 -124.4 1.759 93.6 0.0418 42.2 0.8866 -17.0 0.400 0.5899 -141.3 1.389 81.1 0.0423 44.5 0.8706 -21.1 0.500 0.5829 -153.1 1.142 70.6 0.0432 51.2 0.8582 -25.3 0.600 0.5808 -162.9 0.965 61.7 0.0452 60.2 0.8470 -29.6 0.700 0.5851 -170.7 0.832 54.0 0.0503 70.1 0.8333 -33.9 0.800 0.5949 -177.5 0.729 47.1 0.0580 78.4 0.8219 -38.3 0.900 0.6023 176.2 0.646 41.1 0.0686 84.7 0.8092 -42.9 1.000 0.6078 170.8 0.572 35.9 0.0822 89.0 0.7944 -47.3 1.100 0.6200 165.3 0.512 31.1 0.0976 91.4 0.7803 -51.9 1.200 0.6310 160.4 0.460 27.6 0.1145 92.2 0.7658 -56.5 1.300 0.6356 155.7 0.409 25.2 0.1331 92.2 0.7498 -61.2 1.400 0.6472 151.4 0.372 23.9 0.1526 91.5 0.7345 -65.8 1.500 0.6567 147.0 0.336 23.3 0.1724 90.2 0.7176 -70.4 1.600 0.6621 142.9 0.307 24.2 0.1934 88.4 0.7003 -75.1 1.700 0.6688 138.7 0.281 25.0 0.2146 86.5 0.6844 -79.7 1.800 0.6737 135.0 0.261 28.7 0.2355 84.3 0.6661 -84.3 1.900 0.6786 131.4 0.249 31.7 0.2569 82.0 0.6464 -88.9 2.000 0.6818 127.6 0.242 36.9 0.2777 79.6 0.6304 -93.5 2.200 0.6819 120.3 0.253 44.0 0.3189 74.5 0.5961 -102.7 2.400 0.6842 113.9 0.273 48.7 0.3583 69.2 0.5628 -111.7 2.600 0.6867 107.7 0.312 50.7 0.3935 64.0 0.5313 -120.9 2.800 0.6841 102.3 0.348 50.8 0.4268 59.0 0.5049 -129.7 3.000 0.6791 97.1 0.385 49.2 0.4559 54.1 0.4787 -138.5 ! ! SIEMENS AG Semiconductor Group, Munich