Anna the Audiophile has asked for your help to build an amplifier
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.
![Anna the Audiophile has asked for your help to build an amplifier and filter to take small
signals from her hifi system and amplify them so that she can drive her new subwoofer. The
hifi system produces AC signals at varying frequencies with 250mVrms maximum magnitude.
Her subwoofer requires the signals to be 20 Vrms maximum magnitude. The signals that Anna
is interested in are below 200 Hz. She would like the filter to attenuate signals at frequencies
above 200 Hz.
Hifi
system
250 mVrms
Vin
Amplifier
and
Filter
Va
1
2
SW,
Subwoofer
C₁ = 1000 uF
452
+
Vout
tw
Speaker
(a) Design the amplifier and filter circuit to meet Anna's requirements. The circuit must
produce the required gain, and also attenuate the signals above 200 Hz. Show
calculations for the selection of components where practical. Show a circuit diagram for
the complete amplifier and filter circuit.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2b0c6ad5-2605-460d-b149-4d8c0565bcf2%2Fc889d10a-f18f-483e-8932-41fad9dc1753%2Fc71w5iq_processed.png&w=3840&q=75)
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