PARAMETER CALCULATIONS What is power and how do you calculate it from the energy?

Just Click on Below Link To Download This Course:

http://bit.ly/2Y4kg9R

REET 420 Week 2 Complete Work DeVry

Week 2 Power Parameter Calculations

REET 420 Week 2 Discussion

WEEK 2: APPLICATIONS OF POWER-PARAMETER CALCULATIONS

What is power and how do you calculate it from the energy?

REET 420 Week 2 Lab Overview

Objectives

• Given an operational amplifier circuit, be able to recognize the effects of the biasing components on the input biasing current and the output voltage.
• Given an operational amplifier circuit, be able to compute the power consumed by the load, the power provided by the dc supplies, and the power that the op amp must be able to dissipate.
• Continue to develop expertise with Multisim.

Parts List

Software

• Multisim 11

Introduction

One of the most convenient ways to control the power to lower power loads is with an operational amplifier. It is important to understand the effect of adding gain to the op amp circuit and to be able to calculate the output voltage. Op amps may, typically, be powered by over 50 V at 5 A. Working with this much voltage and current requires you to anticipate the power delivered to the load, the power provided by the dc supplies, and the power that the op amp must be able to dissipate. Before beginning your Lab, download your Lab cover page here (Links to an external site.).

Required Software

This Lab will use the following Lab Resources:

• Virtual Lab – Citrix

Use a personal copy of the software or access the Lab Resources, go to the Course Resources page – Lab Resources section.

Lab Steps

STEP 1: The Noninverting Op Amp

1. When biasing the op amp, proper consideration must be given to the effect of the input bias current. Higher power op amps, such as the OPA548, are typically configured very similarly to the familiar LM741. Simulate the circuit shown below, and confirm the input bias current and the output voltage.
2. Run the simulation again, setting R_f = 10 kΩ and R_i = 100 Ω. What are the new values for the input biasing current and the output voltage?
   

Image Description  (Links to an external site.)

STEP 2: DC Signal, Power Op Amp Calculations

1. Calculate the power delivered to the load, provided by the supply, and dissipated by the op amp for the circuit shown below. It is running from + and – 12 Vdc and delivering 5 Vdc to a 10 Ω resistive load. Include all of your work for full credit.
2. Simulate the circuit to verify your results, and include figures of the wattmeter readings in your report.
3. Decrease the power supply to 10 V and recompute the power losses, as in part 1.

Image Description  (Links to an external site.)

STEP 3: AC Signal, Power Op Amp Calculations

1. Calculate the power delivered to the load, provided by the supply, and dissipated by the op amp for the circuit shown below. It is running from + and – 12 Vdc and delivering a 5 Vp sine wave to a 10 Ω resistive load. Include all of your work for full credit.
2. Simulate the circuit to verify your results, and include figures of the wattmeter readings in your report.

Image Description  (Links to an external site.)

STEP 4: Questions and Discussion

1. Why is it important to carefully compute the power consumption in power op amp circuits?
2. Under what operating conditions, does the worst case power dissipation for an op amp occur?

REET 420 Week 2 Assignment

Complete and submit the following assignment: Chapter 3, pp. 156-157, problems 3-1 through 3-9. Keep a copy of your homework for your review!

Download Now