Table of Contents
Why the collector current is independent of collector to base voltage?
In the active region, the collector current is essentially independent of collector voltage and depends only upon the emitter current. Because adc is, less than one but almost equal to unity, the magnitude of the collector current is slightly less that of emitter current.
What is the collector current to emitter current in a BJT?
The common emitter configuration has a current gain approximately equal to the β value of the transistor itself. However in the common collector configuration, the load resistance is connected in series with the emitter terminal so its current is equal to that of the emitter current.
Why does collector current increases with base current?
Collector Current It increases for larger emitter currents because the larger number of electrons injected into the base exceeds the available holes for recombination so the fraction which recombine to produce base current delines even further.
Why is Collector current constant?
Because the collector current is only equal to the product of beta (β) and the base current (Ib) when the transistor is not in saturation. Because the collector current is only equal to the product of beta (β) and the base current (Ib) when the transistor is not in saturation.
What is the most important fact about the collector current in BJT?
What is the most important fact about the collector current? It is measured in milliampere. It equals the base current divided by the current gain.
What happens when collector current increases?
An increase in base current means more bias to the transistor which further means collector current will also increase but till the limiting value of the transistor parameters. However, if you try to push more current to the base, collector current would no more increase but the transistor may break down.
What is the most important characteristic of BJT?
The most important characteristic of the BJT is the plot of the collector current, the collector-emitter voltage, CE, for various values of the base current, I
What is the relationship between collector current and base current?
Therefore, the collector current is related to the emitter current which is in turn a function of the B-E voltage. The voltage between two terminals controls the current through the third terminal. This is the basic principle of the BJT The collector current and the base current are related by
What is a BJT transistor?
Transistors: Bipolar Junction Transistors (BJT) General configuration and definitions The transistor is the main building block “element” of electronics. It is a semiconductor device and it comes in two general types: the Bipolar Junction Transistor (BJT) and the Field Effect Transistor (FET).
How to distinguish between IC and VCE regimes in BJT?
In order to distinguish these regimes we have to look at the i-v characteristics of the device. The most important characteristic of the BJT is the plot of the collector current, IC, versus the collector-emitter voltage, VCE, for various values of the base current, IBas shown on the circuit of Figure 6.