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Under reverse bias, the diode equation's exponential term is near 0, so the current is near the somewhat constant reverse current value (roughly a picoampere for silicon diodes or a microampere for germanium diodes, [1] although this is obviously a function of size).
A load line diagram, illustrating an operating point in the transistor's active region.. Biasing is the setting of the DC operating point of an electronic component. For bipolar junction transistors (BJTs), the operating point is defined as the steady-state DC collector-emitter voltage and the collector current with no input signal applied.
In the discussion below, focus is on the NPN BJT. In what is called active mode, the base–emitter voltage and collector–base voltage are positive, forward biasing the emitter–base junction and reverse-biasing the collector–base junction. In this mode, electrons are injected from the forward biased n-type emitter region into the p-type ...
The general form of the solution is a curve with decreasing as increases (see graphs lower down). The slope at small or negative V out {\displaystyle V_{\text{out}}} (where the W function is near zero) approaches − 1 / ( R S + R SH ) {\displaystyle -1/(R_{\text{S}}+R_{\text{SH}})} , whereas the slope at high V out {\displaystyle V_{\text{out ...
This band alignment is due to the biasing conditions that correspond with forward-active mode; forward bias on the emitter-base junction and reverse bias on the base-collector junction. Licensing I, the copyright holder of this work, hereby publish it under the following license:
A silicon p–n junction in reverse bias. Connecting the p-type region to the negative terminal of the voltage supply and the n-type region to the positive terminal corresponds to reverse bias. If a diode is reverse-biased, the voltage at the cathode is comparatively higher than at the anode. Therefore, very little current flows until the diode ...