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BCW33LT3G Datasheet(PDF) 3 Page - ON Semiconductor |
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BCW33LT3G Datasheet(HTML) 3 Page - ON Semiconductor |
3 / 6 page BCW33LT1G http://onsemi.com 3 Figure 3. Noise Voltage f, FREQUENCY (Hz) 5.0 7.0 10 20 3.0 Figure 4. Noise Current f, FREQUENCY (Hz) 2.0 10 20 50 100 200 500 1k 2k 5k 10k 100 50 20 10 5.0 2.0 1.0 0.5 0.2 0.1 BANDWIDTH = 1.0 Hz RS = 0 IC = 1.0 mA 100 mA 30 mA BANDWIDTH = 1.0 Hz RS ≈∞ 10 mA 300 mA IC = 1.0 mA 300 mA 100 mA 30 mA 10 mA 10 20 50 100 200 500 1k 2k 5k 10k TYPICAL NOISE CHARACTERISTICS (VCE = 5.0 Vdc, TA = 25°C) Figure 5. Narrow Band, 100 Hz IC, COLLECTOR CURRENT (mA) 500k Figure 6. Narrow Band, 1.0 kHz IC, COLLECTOR CURRENT (mA) 10 2.0 dB BANDWIDTH = 1.0 Hz Figure 7. Wideband IC, COLLECTOR CURRENT (mA) 10 10 Hz to 15.7 kHz Noise Figure is defined as: NF + 20 log10 en2 ) 4KTRS ) In 2RS2 4KTRS 1 2 = Noise Voltage of the Transistor referred to the input. (Figure 3) = Noise Current of the Transistor referred to the input. (Figure 4) = Boltzman’s Constant (1.38 x 10−23 j/°K) = Temperature of the Source Resistance (°K) = Source Resistance (Ohms) en In K T RS 3.0 dB 4.0 dB 6.0 dB 10 dB 50 100 200 500 1k 10k 5k 20k 50k 100k 200k 2k 20 30 50 70 100 200 300 500 700 1k 10 20 30 50 70 100 200 300 500 700 1k 500k 100 200 500 1k 10k 5k 20k 50k 100k 200k 2k 1M 500k 50 100 200 500 1k 10k 5k 20k 50k 100k 200k 2k 20 30 50 70 100 200 300 500 700 1k BANDWIDTH = 1.0 Hz 1.0 dB 2.0 dB 3.0 dB 5.0 dB 8.0 dB 1.0 dB 2.0 dB 3.0 dB 5.0 dB 8.0 dB NOISE FIGURE CONTOURS (VCE = 5.0 Vdc, TA = 25°C) |
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