# What is the input resistance of a common base amplifier?

## What is the input resistance of a common base amplifier?

Common base transistor amplifier characteristics summary

Common base characteristics
Parameter Characteristics
Input / output phase relationship
Input resistance Low
Output resistance High

### What is the output resistance of common base amplifier?

In a common base amplifier, the load resistance of the output circuit is 1000 times the resistance of the input circuit. If α= 0.

What is input and output resistance of CE amplifier?

The input and output impedance of an amplifier is the ratio of voltage to current flowing in or out of these terminals. The input impedance may depend upon the source supply feeding the amplifier while the output impedance may also vary according to the load impedance, RL across the output terminals.

What is input resistance in CE amplifier?

The input resistance of a common emitter amplifier is 330 Ω and the load resistance is 5 k Ω . A change of base current is 15 mu A results in the change of collector current by 1 mA .

## Does the common base amplifier have a low or a high input resistance?

The input resistance of common base amplifier is very low. Dynamic output resistance is defined as the ratio of change in output voltage or collector voltage (VCB) to the corresponding change in output current or collector current (IC), with the input current or emitter current (IE) kept at constant.

### What is the output terminal of common base?

The Common Base Amplifier is a type of BJT configuration or bipolar junction transistor, in which the input and output signals share the base terminal of the transistor, hence the name common base (CB).

Why is input resistance low in common bases?

Low impedances! So in summary, the common base amplifier has a kind of active voltage source behavior, according to how the collector-emitter current responds to changes in the applied input voltage, and this gives it a lower impedance than you would expect just from looking at it statically.

What is input and output resistance?

The output impedance refers to the impedance, or opposition to current flow, of the component that often bears an electrical source to “drive” a load component. Meanwhile, the input impedance refers to the load component’s opposition to current flowing in from the electrical source.

## What is common-base amplifier?

The Common Base Amplifier is a type of BJT configuration or bipolar junction transistor, in which the input and output signals share the base terminal of the transistor, hence the name common base (CB). This means that its base-emitter junction will need to be forward-biased.

### What is output and input resistance?

What is meant by input resistance?

The input resistance is the resistance seen by the current source or voltage source which drives the circuit.

What are the main characteristics of the common base amplifier?

Characteristics of Common Base Amplifier Circuit

• High voltage gain.
• Low current gain.
• Low power gain.
• Input and output phase relation is 0o.
• It has low input impedance.
• It has high output impedance.