# What Are Transistor Parameters?

## What are alpha and beta parameters for a transistor?

Alpha (αdc): It is defined as the ratio of collector current to emitter current.

Beta (βdc): It is the current gain defined as the ratio of collector current to the base current..

## How many H parameters are there for a transistor?

two hIts unit is ohm-1 or mho. Thus there are two h-parameters which are unit less or dimensionless.

## What is transistor configuration?

Bipolar Transistor Configurations Common Base Configuration – has Voltage Gain but no Current Gain. Common Emitter Configuration – has both Current and Voltage Gain. Common Collector Configuration – has Current Gain but no Voltage Gain.

## What is PNP transistor?

The PNP Transistor is the exact opposite to the NPN Transistor device we looked at in the previous tutorial. … Then, PNP transistors use a small base current and a negative base voltage to control a much larger emitter-collector current.

## What is the function of BJT?

The main basic function of a BJT is to amplify current it will allow BJTs are used as amplifiers or switches to produce wide applicability in electronic equipment include mobile phones, industrial control, television, and radio transmitters.

## What are the four hybrid parameters?

The four hybrid parameters h11, h12, h21 and h22 are defined as follows. = Input Impedance with output part short circuited.

## What are the units of H parameters?

The coefficients of independent variables, I1 and V2, are called as h-parameters. h-parameters are called as hybrid parameters. The parameters, h12 and h21, do not have any units, since those are dimension-less. The units of parameters, h11 and h22, are Ohm and Mho respectively.

## What are 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).

## Which parameters are widely used in transistor circuits?

Common emitter transistor configuration This transistor configuration is probably the most widely used. The circuit provides a medium input and output impedance levels. Both current and voltage gain can be described as medium, but the output is the inverse of the input, i.e. 180° phase change.

## What is relation between alpha and beta?

Alpha of a transistor is defined as the current gain in the common base configuration which is in turn defined as the ratio of change in the collector current to change in the emitter current. … Also, beta is the current gain in Common Emitter configuration.

## What are the types of transistor?

Transistors are basically classified into two types; they are Bipolar Junction Transistors (BJT) and Field Effect Transistors (FET). The BJTs are again classified into NPN and PNP transistors.

## Which transistor is best?

Best Transistors: BJTs#1 NPN – 2N3904. You can find most often NPN Transistors in low-side switch circuits. … #2 PNP – 2N3906. For high-side switch circuits, you need a PNP style BJT. … #3 Power – TIP120. … #4 N-Channel (Logic Level) – FQP30N06L.Apr 21, 2014