Difference Between Voltage Amplifier and Power Amplifier

Hello, friends I hope you all are doing great. In this post will have a detailed look at Difference Between Voltage Amplifiers and Power Amplifiers. The amplifier is circuitry that is used to increase the signal level existing at the input and offers a high-value signal. The resulting signal is called the applied signal and the process used is called amplification.

There are 2 types of amplifiers first one is voltage and the second one is power amplifier. The basic difference is that in a voltage amplifier voltage level increases and in a power amplifier power level of the signal increases. so let’s get started with

Difference Between Voltage Amplifier and Power Amplifier

What is a Voltage Amplifier

• This type of circuit configuration does the voltage amplification and is created in such configuration to increase the signal given at the input of circuitry.

• Its design configuration relies on the maximum value of voltage gain.
• The gain is the ratio among the output to input and in the case of voltage amplifier, it is the ratio among the output voltage and input voltage.
• AV=Vo/p / Vip
• Let us assume that the voltage provided at input is one volt and output is twenty-five volts after the amplification process so its voltage gain will be twenty-five volts.
• Such amplifiers are configured so that very little quantity of power is given to the load.
• These appliers are also called small-signal amplifiers.

What is Power Amplifier

• The power amplifier is such a circuitry configuration that is created to increase the power level of the signal provided at the input of circuitry.
• To get a high value of power at the output there should be a high value of signal at the input.
• So there is the use of a voltage amplifier at the input of the power amplifier.

Comparison between Voltage Amplifier and Power Amplifier

Voltage Amplifier

• This amplifier is used to increase the voltage level of the signal.
• It is also called a smaller signal amplifier configuration
• Its magnitude is less.
• The coupling circuit used for this circuit is RC.
• It used a smaller size base region.
• There is very less collector current for this circuitry.
• Its gain value is five to twenty.
• A small transistor is used for circuitry.

• Lad impedance value is four to ten-kilo ohm

Power amplifier

• This circuitry is used to increase the power level of the signal.
• This is known as a large signal amplifier.
• Its magnitude is less.
• Tranfomerer could be used for this module.
• The base of the transistor has a larger area.
• The collector current is high—almost one hundred ampers.
• The gain value is one hundred.
• Heat dissipation is large.
• Impedance is five to twenty ohms.

Voltage Amplifier vs Power Amplifier

Voltage Amplifier

• This type of amplifier is made for increasing input signal levels, known as voltage amplifiers.
• Voltage amplifiers are also called small signal amplifiers.
• The input voltage of these amplifiers is low—about some mV.
• Voltage amplifiers come with high voltage and low output power.
• It comes with a small transistor for circuit creation.
• It comes with a high β value of about 100.
• R-C coupling used for voltage amplifiers
• It has a low collector current of about one milliampere.
• It comes with a thin base region since it has features to handle low-current
• The load comes with high resistance that is about 4 kΩ to 10 kΩ.
• AC power output is low and comes with a high output impedance, which is 12 kΩ.
• It does not need a heat sink.

Power Amplifier

• This type of amplifier is made to boost the power of the input signal, known as an amplifier.
• The power amplifiers are known as larger signal amplifiers.
• The input voltage of power amplifiers is high, about a few volts.
• It has high power and low voltage output.
• The transistor used for this amplifier is larger.
• It comes with a low β value of about 5 to 20.
• It uses transformer coupling.
• Its collector current is about 100 mA.
• The base region of this transistor is thick since it needs a larger current.
• Load resistance is low, about 5 Ω to 20 Ω.
• The AC power output of these amplifiers is higher.
• Output impedance is low, which is about 200 Ω.
• Heat sink needed for these amplifier types

FAQS

That is a detailed post about the Difference Between Voltage amplifiers and Power amplifiers if you have any further queries ask in a comment. Thanks for reading.