Contents
How to calculate the base-emitter voltage in an NPN?
So you can calculate the current flowing through Rb/base now. You know beta already, so you can calculate the collector current, therefore the collector emitter voltage. Based on our initial assumption, the transistor is in active mode.
Which is the correct voltage between collector and emitter?
Yours are correct only in this specific circuit if we assume the negative terminals of the voltage supplies are at gnd. In this specific circuit with that assumption, they are equivalent, but that’s only because the Emitter is grounded (at 0 volts), therefore, Vbe = Vb and Vce = Vc.
How to calculate the input characteristics of a common emitter configuration?
Input Characteristics Curve of Common Emitter Configuration: It is the function of base current IB and VBE (base-emitter voltages) at constant collector-emitter voltage VCE. Input characteristics curve can be obtained by keeping the output voltage VCE constant and varying the input voltage VBE and then record the value.
What is the base current of a collector?
Since the beta is stated as 125, and the base current is calculated as 6.2uA, the collector current must be (6.2uA * 125) .775mA. That current through a 5K resistor produces a drop of 3.875V across the resistor. The collector voltage must be Vcc – 3.875, or 16.125V.
How to calculate the emitter current, i e?
How to Calculate the Emitter Current, I e, of a Transistor. The emitter current, I e, of a transistor is the amplified output current of a bipolar junction transistor. There are several ways to find the emitter current, I e, of a transistor. And it all depends on what information is already known about the transistor:
What is the be voltage between base and emitter?
As the first figure shows, for any decently large base current the voltage drop between the base and the emitter will be around 0.6 to 0.7 V. Mathematically, this means that the BE voltage is the log of the current.
How to calculate bias voltage in a BJT transistor?
Ve= Emitter Voltage . Vb= Base Voltage. Ic= Collector gain x Ib. Ve= ICx Re. Vb= Vex Base to Emitter Drop . Vc= Vs- ICx Rc. If (Vc< Ve) then, . Vc= Ve. Vb= Ve+ Base to Emitter Drop .