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amplitude approximately assumed axis bandwidth base current bias capacitance capacitor carrier cathode characteristic curves charge circuit of Fig collector current collector voltage common collector common emitter component conduction configuration constant control grid current gain cutoff d-c load decreases density determined diode electrons emitter current energy equal equation equivalent circuit example filter forbidden band frequency germanium given in Fig grid voltage increased inductance input impedance input resistance input signal input voltage linear load line load resistance magnitude maximum modulation index noise operating point oscillator output current output voltage p-n junction p-n-p transistor parameters pentode phase plate current plate voltage poles potential power gain power supply PROB R-C coupled R-C coupled amplifier ratio reactance rectifier region resistor root-locus saturation screen grid semiconductor shown in Fig sinusoidal temperature thermal transfer function transformer transistor amplifier triode tuned amplifier tuned circuit tunnel diode vacuum tube velocity voltage gain volts waveform zero