Homework Help is Here – Start Your Trial Now!
Engineering
Electrical Engineering
If the output power from an audio amplifier is measured at 120W when the signal frequency is 1kHz, and 300W when the signal frequency is 10kHz. Calculate the dB charge in power.

If the output power from an audio amplifier is measured at 120W when the signal frequency is 1kHz, and 300W when the signal frequency is 10kHz. Calculate the dB charge in power.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
See similar textbooks
icon
Related questions
Question

Answer the following with illustration and solutions.

2. If the output power from an audio amplifier is measured at 120W when the signal frequency is 1kHz, and 300W when the signal frequency is 10kHz. Calculate the dB charge in power.

These is the example that might help.. see the picture below.

Amplifier Gain / Loss Small Input Signal Larger Output Signal Amplification Stage Iin I out Output Input Vin Gain (A) Vout Current Amp Gain/Loss Power Amp Gain/Loss Ap = A, × A P. Ap = P Voltage Amp Gain/Loss A, A = ay = 20log(A,) (in decibels) aj = 20log(A¡) (in decibels) ap = 10 log(Ap) (in decibels) where: where: where: A, - Voltage Gain/Loss a, - Voltage Gain/Loss (in decibels) Vi - Voltage Input Vo - Voltage Output A - Voltage Gain/Loss a¡ - Voltage Gain/Loss (in decibels) I - Current Input Io - Current Output Ap - Voltage Gain/Loss ap - Voltage Gain/Loss (in decibels) P - Current Input Po - Current Output Example: • If an electronic system produces a 24 mV output voltage when 12 mV signal is applied, calculate the decibel value of the system output voltage. • If the output power from an audio amplifier is measured at 10 W when the signal frequency is 1 kHz, and 1 W when the signal frequency is 10 kHz. Calculate the dB change in power. a, = 20log(A,) 10 log(A,) Po Ap = a, = A, = (24mV a, = 20log (2) = 20log = 6 dB 12mV 1 W a, = 10 log () = 10 log () = -10 dB 10 W
Transcribed Image Text:Amplifier Gain / Loss Small Input Signal Larger Output Signal Amplification Stage Iin I out Output Input Vin Gain (A) Vout Current Amp Gain/Loss Power Amp Gain/Loss Ap = A, × A P. Ap = P Voltage Amp Gain/Loss A, A = ay = 20log(A,) (in decibels) aj = 20log(A¡) (in decibels) ap = 10 log(Ap) (in decibels) where: where: where: A, - Voltage Gain/Loss a, - Voltage Gain/Loss (in decibels) Vi - Voltage Input Vo - Voltage Output A - Voltage Gain/Loss a¡ - Voltage Gain/Loss (in decibels) I - Current Input Io - Current Output Ap - Voltage Gain/Loss ap - Voltage Gain/Loss (in decibels) P - Current Input Po - Current Output Example: • If an electronic system produces a 24 mV output voltage when 12 mV signal is applied, calculate the decibel value of the system output voltage. • If the output power from an audio amplifier is measured at 10 W when the signal frequency is 1 kHz, and 1 W when the signal frequency is 10 kHz. Calculate the dB change in power. a, = 20log(A,) 10 log(A,) Po Ap = a, = A, = (24mV a, = 20log (2) = 20log = 6 dB 12mV 1 W a, = 10 log () = 10 log () = -10 dB 10 W
Expert Solution
steps

Step by step

Solved in 2 steps with 2 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
State Variable Analysis
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
Electrical Engineering
ISBN:
9780133923605
Author:
Robert L. Boylestad
Publisher:
PEARSON
Delmar's Standard Textbook Of Electricity
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:
9781337900348
Author:
Stephen L. Herman
Publisher:
Cengage Learning
Programmable Logic Controllers
Programmable Logic Controllers
Electrical Engineering
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education
Fundamentals of Electric Circuits
Fundamentals of Electric Circuits
Electrical Engineering
ISBN:
9780078028229
Author:
Charles K Alexander, Matthew Sadiku
Publisher:
McGraw-Hill Education
Electric Circuits. (11th Edition)
Electric Circuits. (11th Edition)
Electrical Engineering
ISBN:
9780134746968
Author:
James W. Nilsson, Susan Riedel
Publisher:
PEARSON
Engineering Electromagnetics
Engineering Electromagnetics
Electrical Engineering
ISBN:
9780078028151
Author:
Hayt, William H. (william Hart), Jr, BUCK, John A.
Publisher:
Mcgraw-hill Education,
SEE MORE TEXTBOOKS