What is the effect of inherent variations of transistor parameters on our amplifier circuit?

The collector current in a transistor changes rapidly when (i) the temperature changes, This is due to the inherent variations of transistor parameters. When the temperature changes or the transistor is replaced, the operating point (i.e. zero signal IC and VCE) also changes.

What are the important parameters that define the response of a transistor?

The important parameters of a transistor are the same as those for any amplifier, namely, input and output impedances, gain and feedback ratios. The amplifier characteristics will, of course, be determined by the parameters of the active devices it contains.

What are the parameters of transistor?

Some of the important parameters of transistors are mentioned below:

• Current gain. The current gain of a transistor is the measure of the ability of the transistor’s amplification property.
• Collector-Emitter Voltage (VCEO)
• Emitter-Base Voltage (VEBO)
• Collector current (IC)

Which parameter is used to measure the best transistor?

Current Gain (β) In any circuit, the current gain of a transistor is an important parameter. Current gain is usually referred to as a β or hfe. Current is the ratio of the base current to the collector current and a measure of the amplifying ability of the transistor.

How does transistor work as amplifier?

A transistor acts as an amplifier by raising the strength of a weak signal. The DC bias voltage applied to the emitter base junction, makes it remain in forward biased condition. Thus a small input voltage results in a large output voltage, which shows that the transistor works as an amplifier.

When transistor is used as an amplifier it increases?

A transistor will act as an amplifier by raising the strength of the input signal. A small change in input signal can lead to an appreciable change in the output when there is low resistance in the input circuit.

What are A and B parameters of a transistor What is the relation between the two?

There is a transistor given, whose two of the parameters are alpha and beta. A transistor ‘s alpha is the current gain defined as the ratio of change in collector current to change in emitter current in the common base configuration, while beta is the current gain in the \[{\text{CE}}\] configuration.

Which of the following parameter decides the operating speed of transistor?

In principle, the upper limit on transistor speed is determined, on one hand, by the inertia of the physical processes taking place in the region where charge carriers interact with the electric field in the semiconductor, and, on the other hand, by the time it takes to charge the transistor’s output capacitance (which …

What is hybrid parameters of transistor?

Hybrid parameters (also known as h parameters) are known as ‘hybrid’ parameters as they use Z parameters, Y parameters, voltage ratio, and current ratios to represent the relationship between voltage and current in a two port network. The problem can instead be solved by using hybrid parameters (i.e. h parameters).

Why are transistors packaged differently?

Bipolar transistors come in a wide variety of physical packages. Package type is primarily dependent upon the required power dissipation of the transistor, much like resistors: the greater the maximum power dissipation, the larger the device has to be to stay cool.

What is the effect of temperature variation on the transistor output characteristics?

An increase in temperature produces an increase in the minority carrier current, but a negative change in VBE, so both effects lead to an increase in collector current with temperature.

Why does a transistor amplify?

What are the h-parameters of a transistor used for?

The h-parameters of a transistor will give you a good idea what it can do, how to use it effectively in a circuit, and whether it is appropriate for a particular circuit. In practise, only a few h-parameters are commonly used. The most common one if hfe, which stands for h-forward-emitter.

How to choose the right transistor for your circuit?

For electronic circuit design, selecting the right transistor will need several of the transistor parameters to match the requirements for the circuit. Therefore a variety of the parameters will need to be carefully matched.

Why transistors are more complicated than resistors and capacitors?

Transistors are more complicated than resistors and capacitors because you can choose a resistor or capacitor according to required resistance or capacitance value but while choosing a transistor, you have to look for many transistor parameters. So it is a challenging task to choose the right transistor for your circuit.

Why are transistors used as amplifiers?

Ans- Transistors can change the output of the device when the input signal is varied, and hence they are used as amplifiers. Transistors are mainly used in electric devices like desktop, smartphone, laptop, tablet, etc for performing logical operations.