The headphone amplifier in a battery-powered devicehas an output resistance of 28 and is designedto deliver 0.1 W to the headphones. If theresistance of the headphones is 24 , calculate thevoltage and current required from the dependentvoltage source (Av in our model) to deliver 0.1 Wto the headphones. How much power is deliveredfrom dependent source? How much power is lost inthe output resistance?
Power Amplifier
The power amplifier is an electronic amplifier designed to maximize the signal strength of a given input. The input signal strength is enhanced to a high enough level to drive output devices such as speakers, headphones, RF (Radio frequency) transmitters, etc. Unlike voltage / current amplifiers, the power amplifier is designed to drive core loads directly and is used as a storage block in the amplifier series.
Maximum Efficiency Criterion
In every field of engineering, there is a tremendous use of the machine and all those machines are equipped for their popular work efficiency so it very much important for operation engineers to monitor the efficiency of the machine, planning engineers to check out the efficiency of the machine before installing the machine and design engineers to design machine for higher efficiency than and then the utility will procure their products that will ultimately lead to profit and loss of the company. It indicates the importance of efficiency right from the initial stage as manufacturing units, intermediate stage as planning coordinators, and end-users stage as a utility.
The headphone amplifier in a battery-powered device
has an output resistance of 28 and is designed
to deliver 0.1 W to the headphones. If the
resistance of the headphones is 24 , calculate the
voltage and current required from the dependent
voltage source (Av in our model) to deliver 0.1 W
to the headphones. How much power is delivered
from dependent source? How much power is lost in
the output resistance?
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