Datasheet 2N3905/2N3906 (Motorola) - 4

TYPICAL AUDIO SMALL– SIGNAL CHARACTERISTICS NOISE FIGURE VARIATIONS
(VCE = –5.0 Vdc, TA = 25°C, Bandwidth = 1.0 Hz) 5.0 12 SOURCE RESISTANCE = 200 W f = 1.0 kHz IC = 1.0 mA IC = 1.0 mA 10 4.0 IC = 0.5 mA SOURCE RESISTANCE = 200 W IC = 0.5 mA 8 3.0 SOURCE RESISTANCE = 2.0 k 6 IC = 50 mA 2.0 , NOISE FIGURE (dB) , NOISE FIGURE (dB) 4 NF NF IC = 50 mA 1.0 SOURCE RESISTANCE = 2.0 k I 2 C = 100 mA IC = 100 mA 0 0 0.1 0.2 0.4 1.0 2.0 4.0 10 20 40 100 0.1 0.2 0.4 1.0 2.0 4.0 10 20 40 100 f, FREQUENCY (kHz) Rg, SOURCE RESISTANCE (k OHMS)
Figure 7. Figure 8. h PARAMETERS
(VCE = –10 Vdc, f = 1.0 kHz, TA = 25°C) 300 100 70 m 50 200 GAIN ANCE ( mhos) 30 100 ADMITT 20 70 feh , DC CURRENT 10 50 h , OUTPUT oe 7 30 5 0.1 0.2 0.3 0.5 0.7 1.0 2.0 3.0 5.0 7.0 10 0.1 0.2 0.3 0.5 0.7 1.0 2.0 3.0 5.0 7.0 10 IC, COLLECTOR CURRENT (mA) IC, COLLECTOR CURRENT (mA)
Figure 9. Current Gain Figure 10. Output Admittance
20 10 –4 7.0 10 OHMS) 7.0 5.0 TIO (X 10 ) (k 5.0 RA 3.0 3.0 2.0 2.0 IMPEDANCE FEEDBACK 1.0 0.7 TAGE 1.0 ie 0.5 h , INPUT re 0.7 0.3 h , VOL 0.2 0.5 0.1 0.2 0.3 0.5 0.7 1.0 2.0 3.0 5.0 7.0 10 0.1 0.2 0.3 0.5 0.7 1.0 2.0 3.0 5.0 7.0 10 IC, COLLECTOR CURRENT (mA) IC, COLLECTOR CURRENT (mA)
Figure 11. Input Impedance Figure 12. Voltage Feedback Ratio
4 Motorola Small–Signal Transistors, FETs and Diodes Device Data