Electronics: A Systems Approach (4th Edition)
Format: PDF / Kindle (mobi) / ePub
The fourth edition of Electronics: A Systems Approach is an outstanding introduction to this fast-moving, important field. Fully updated, it covers the latest changes and developments in the world of electronics. It continues to use Neil Storey’s well-respected systems approach, firstly explaining the overall concepts to build students' confidence and understanding, before looking at the more detailed analysis that follows. This allows the student to contextualise what the system is designed to achieve, before tackling the intricacies of the individual components. The book also offers an integrated treatment of analogue and digital electronics, highlighting and exploring the common ground between the two fields.
This fourth edition represents a significant update and a major expansion of previous material, and now provides a comprehensive introduction to basic electrical engineering circuits and components in addition to a detailed treatment of electronic systems. This extended coverage permits the book to be used as a stand-alone text for introductory courses in both Electronics and Electrical Engineering.
oscilloscope, since this is the quantity that is most readily observed. Care must be taken when comparing such ·· ELEA_C02.qxd 2/10/09 2:18 PM Page 40 40 CHAPTER 2 MEASUREMENT OF VOLTAGES AND CURRENTS Figure 2.17 Measurement of phase difference using an oscilloscope. readings with those taken using a multimeter, since the latter will normally give r.m.s. values. Oscilloscopes also allow the direct comparison of waveforms and permit the temporal relationship between them to be
with electrical contacts on each end. If the body of the component is uniform, its resistance will be directly related to its length (l) and inversely related to its cross-sectional area (A). Under these circumstances, the resistance of the device will be given by R= ρl A (3.3) The units of resistivity are ohm metres (Ω·m). Copper has a resistivity of about 1.6 × 10−8 Ω·m at 0 °C, while carbon has a resistivity of 6500 × 10−8 Ω·m at 0 °C. Since the flow of current through a resistor produces
current no matter what is connected to it. Such a source has an infinite output resistance. • The current in a conductor is directly proportional to the voltage across it (this is Ohm’s law). This voltage divided by the current gives the resistance of the conductor. • The resistance of several resistors in series is given by the sum of their resistances. • The resistance of several resistors in parallel is equal to the reciprocal of the sum of the reciprocals of their resistances. • At any
www.pearsoned.co.uk/storey-elec to find valuable online resources Companion Website for students • Computer-marked self-assessment questions to check your understanding • Demonstration files that can be downloaded for use with the Computer Simulation exercises. For instructors • Full solutions manual • PowerPoint slides with all figures from the book. Also: The Companion Website provides the following features: • Search tool to help locate specific items of content • E-mail results and profile
change in the current. This process is known as self-inductance. The voltage produced across the inductor as a result of changes in the current is given by the expression V =L dI dt (5.9) where L is the inductance of the coil. The unit of inductance is the henry (symbol H), which can be defined as the inductance of a circuit when an e.m.f. of 1 V is induced by a change in the current of 1 A/s. 5.5.1 Notation It should be noted that some textbooks assign a negative polarity to the voltages of