Essays on Amplitude

* Names of Group: 1. .. ID #: 2. ID #: 3 ID #: * Date: / / .

Discussion:

Using the measurements made in the procedure, calculate the quiescent current IE, and the internal emitter resistance re. The quiescent current IE and internal emitter resistance re can be calculated using the DC analysis carried out in Step#1 and Step#2 of the procedure. The DC voltage measured across RE is used to measure the biasing current across the emitter of BJT. The voltage is measured to be 793mV. Since RE = 1KΩ, so: IE=VERE=0.7931000=0.000793A=0.793mA.

Now, we can calculate the internal resistance of emitter using the formula provided in the procedure. So:

re=0.026IE=0.0260.000793=32.786Ω

Using the values obtained in the experiment; draw the small-signal ac equivalent circuit for the amplifier.

In this part, we will draw the small scale ...

A DC circuit consists of a source (e.g. battery or power supply) and a load (e.g. light bulb or electronic instrument). The electrons move from the negative terminal of the source, towards the load and then return to the positive terminal of the source, i.e. the electrons flow in only one direction . This movement of electrons will continue as long as there is a closed circuit. In contrast, the source in the AC circuit is constantly changing. The voltage of the source builds up and electrons flow through the circuit in the same way as for the DC circuit. ...

ENGINE MANAGEMENT SYSTEM

Introduction This study evaluates the operating principles of vehicle fuel systems, vehicle ignition systems and pressure charging of engines. The report attempts to evaluate the operating features of actuators and sensors used in the ignition systems and engine management system of vehicles. It also analyzes the types of pressure charging systems, its shortfalls and how it affects the enhanced power of the engine. The secondary sources which form the bulk of this report are primarily research from various sources. The paragraphs below look into the sensors and actuators and the pressure charging systems.

Sensors and Actuators

Types of Sensors and function The ...

Patient and Study Identification

The patient is a 10-year-old boy sent by the referring specialist neurologist, whom the patient visited after his mother had found him experiencing seizure twice during the past month. The patient was first diagnosed with absence epilepsy when he was 5 years of age, and has not experienced seizures since he was 8 years of age. The purpose of this electroencephalography (EEG) study is to identify the type of epilepsy in this case so that the patient can receive the correct treatment.

History

The patient had a normal birth and experienced healthy development until the age of 5, when his ...

The Physics of Tsunamis

Humans have known about the destructive force of tsunamis for a long time, however, until the devastating tsunami incident in Indian Ocean in 2004 not much international effort was put into the research and development of methods and tools to effectively predict, warn and mitigate the upcoming disaster. The topic of creating an effective early warning system for the areas threatened by tsunamis is very important, but this paper focuses on the physics behind the processes of the formation and propagation of the tsunami waves which, in fact, is the basic knowledge required for developing the warning systems mentioned ...

WINTER 2016

PURPOSE: APPARATUS: Fiber optics of various lengths Trainer boards Function generator and LED Circuits Radio Wood board and tape Reflective Material Paper Ac voltmeter Cables INTRODUCTION: Fiber optics refers to a field of study under both engineering and applied sciences. It deals with the designing and usage of optical fibers. The fibers are flexible and transparent manufactured through the drawing of plastic or silica (glass) to diameters slightly greater than those of human hairs. Most often, optical fibers serve in the transmission of light between the two fiber’s ends. They find a wide use communications since they can ...

PURPOSE

This experiment is about the isolation of the three harmonics that is included in a non-sinusoidal waveform. The non-sinusoidal waveform here is a square wave, and the harmonics being isolated are the fundamental, third, and fifth harmonics. The experimental amplitudes and frequencies will be compared to the theoretical computations.

EQUIPMENT

Oscilloscope Digital Multimeter Function Generator COMPONENTS 10 mH Inductor 10 kΩ Resistor

PROCEDURE AND RESULTS

Figure 1. RLC Circuit Diagram

PART A: Obtain the scaling factors

1) Build the circuit shown in Figure 1. Throughout the experiment, connect the input voltage to channel 1 of the oscilloscope. This input voltage is used as a trigger source for the oscilloscope. ...

Summary: In the article titled, “Abnormal Cortex Plasticity in Juvenile Myoclonic Epilepsy”, the authors investigate the role of defective motor plasticity in the pathogenesis of Juvenile Myoclonic Epilepsy (Strigaro et al.). Prior to this study, JME was linked to motor cortex hyper-excitability and to the abnormal function of thalamic networks. This study, identifies a new mechanism that can cause JME, a common form of generalized epilepsy seen in children. The motor cortex plasticity was studied using an interesting technique called the Paired Associated Stimulation (PAS). The details of this technique are discussed in the methodology section. The role of ...

Objectives

Introduction A wind instrument is an instrument that produces sound by manipulating air through varying the wind pressure passing through the air outputs of the device (Berg and Stock, 27). These devices are heavily dependent on pressure as well as the size and shape of the instrument (pg. 28). A good example of a wind instrument is the organ pipe. It is a tool that produces a specific pitch when pressurized air is driven through it. Organ pipes usually exist in sets, where each is confined to produce a specific tune. Normally, it is a keyboard device that is ...

Introduction

The fiber optic systems are systems which use light as a mode of communication. The system includes fiber cables which allow for the transmission of light through them. Inside the cable are special coatings for protection and also to enable the transmission of light through total internal reflection (Hoss and Lacy). The light is then converted into electrical signals through the use of light detectors having in mind that the signal was produced by a light emitting diode. The use of optics is very wide since the use of light is much more efficient and also flexible being that ...