The first transistor was demonstrated on Dec. 23, 1947, at Bell Labs by William Shockley. This new invention consisting of P type and N type semiconductive materials (in this case germanium) has completely revolutionized electronics. Transistors quickly replaced vacuum tubes in almost all applications (most notably those in discrete logic). Today when we think of transistors the first thing that comes to mind is computers. Advances in transistor technology and manufacturing processes as well as new materials being used for the semiconductor matrix and wiring have led to smaller, faster, cheaper, lower power transistors. Some of the basic principles behind semiconductor behavior and the restrictions currently faced by modern transistors will be discussed in the following pages.
Transistors are composed of a P type (positively doped) and N type (negatively doped) semiconductor material. These P-N junctions are the heart of both BJTs (Bipolar Junction Transistors) and FETs (Field Effect Transistors). BJTs have a physical connection between they current controlling input (base) and the input and output (collector and emitter). This results in a trickle current into the base. FETs have a physical separation between the control (gate) and the input and output (drain and source).
BJT and FET transistors are used in virtually every electronic device requiring current regulation or amplification. They make it very easy to precisely control power to a device reliably and with much greater efficiency than other methods. Another common use of transistors is their role in discrete logic. First used in DTL (Diode Transistor Logic) transistors compact nature and high switching speeds lend themselves well to use in logic ICs. In ...
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...er clock speed operation than the G4 processor and will include all the latest fabrication developments when released. Processor core voltage for this chip will be as low as 1.2v allowing a higher transistor count with very low power dissipation. Pentium 4 core voltage is in the range of 1.55v.
Smaller, faster, cheaper...transistors aren't quite as boring as you thought huh?
Bibliography
1. IBM Copper Technoglogy http://www.chips.ibm.com/
2. AMD http://www.amd.com/
3. Intel Semiconductor Technology http://www.intel.com/
4. Motorola PowerPC Division http://www.motorola.com/
5. Transistor History 101 http://users.arczip.com/rmcgarra1/xstrhist.html
6. Britney's Guide to Semiconductor Physics http://britneyspears.ac/lasers.htm
7. The Mac Address http://www.themacaddress.com/
8. Electromigration http://www.ifw-dresden.de/ifs/31/gfa/em_e.htm
Contents Page Section 3 ……………… …………………… Introduction 3 ……………… …………………… The Pioneers of the Electronic Age 4 ……………… …………………… The Theory of the Synthesiser 5 ……………… …………………… Other Changes Due to Electronic Technology 6 ………………
Pros: Low-price, high performance. PC Magazine tests show systems based on the 450-MHz K6-III are nearly as fast as those based on the 500-MHz Pentium III (though shop wisely, as components can play a big role in K6-III system performance).
Basic Mathematics for Electronics seventh edition: Nelson M. Cooke, Herbert F.R Adams, Peter B. Dell, T. Adair Moore; Copyright 1960
I am going to argue why it is okay to tell as small lie to a friend in order to spare their feelings. I am going to touch on two ethical models, these being, Utilitarianism and Deontology. The individual that is a Utilitarian is Jeremy Bentham and the Deontologist is Immanuel Kant. I will be sharing their ideas and explaining why Jeremy Bentham’s ideas are more defensible than Kant’s ideas. I believe that if you are a good friend, it is important for you to keep the most optimal happiness between your friends and yourself. With Bentham's theory, Utilitarianism, the overall goal is to make the most people happy (Bentham 1). If the storyline of a lie is what makes the most people happy, Benthem says it is okay to lie. For Kant, a person is never
Moor’s Law: The number of transistors incorporated in a chip will approximately double every 24 months. (Moore, 1965)
By the time the 20th century arrived, vacuum tubes were invented that could transmit weak electrical signals which led to the formation of electromagnetic waves that led to the invention of the radio broadcast system (750). These vacuum tubes were discovered to be able to transmit currents through solid material, which led to the creation of transistors in the 1960’s (750).
Semiconductors were being studied in laboratories as early as the 1830's. The materials were usually poor conductors if heated and often carried photoelectric properties. (Electrical production by shining light on the material.) Soon, this property of changing conductivity would become of vital importance to the world of electronics and communications. (Micron) Common semiconductors include silicon, zinc and germanium; however, silicon is by far the most widely implemented due to its abundance. Also, its reasonable speed, simple processing, and useful temperature range make it a good choice among other semiconductors. (Wikipedia - Semiconductor Device) This element has been used to make cast iron, bricks, and pottery, and glass, but it found a new technological purpose. Silicon is extracted from sand and altered using small amounts of impurities (more on that later) so the electrical current across the silicon can be regulated depending on the polarity of the electrical charge applied to it. Before semiconductors (1600's to 1800's), the vacuum tube dominated electronics. Radios, and even computers used vacuum tubes in their circuits. However, semiconductors in the form of transistors, replaced vacuum tubes because they were smaller, lighter, less power consuming, more durable, more reliable, and generated less heat. (Xiao) Semiconductors are now used in almost any electronic component imaginable.
Grundmann, Marius. Physics of Semiconductors: An Introduction Including Devices and Nanophysics. New York: Springer, 2006. Print.
A computer is a device which is used for several applications; business, gaming, or school. It’s important for people to know how computers work because in this day and age, operating a computer is an everyday task. This complex electrical device utilizes several parts inside of it to keep itself cool, conduct the proper tasks, and maintain stability. These devices can be found several places whether it be on the job, in one’s room, or on a school campus. Computers are essential for everyday use in order to complete what is required. What each component is and its function will be described.
Ever since I was in school I would see the electronic gadgets like mobile phones, washing machine and TV this is what triggered my fascination for electronics. The powers they yielded always amazed me. Consequently I decided to attain my Bachelors degree in Electrical and Electronic Engineering as it opened up many possibilities and interesting challenges for the reason that science and technology are the roots of many interesting scientific and technical activities. During my engineering course I was introduced to the concepts of microprocessors and micro controllers and I had taken an instant liking to these subjects.
My fascination towards Electronics N Communication basically developed in the 12th when I took part in a science exhibition. I was then fascinated with the complexities of different structures and their working. The i...
This particular computer also intrigued me because of its processor. The processor is a common one, an Intel Pentium 4. I like that Sony decided to stick with Intel, since they are an American brand. The exact processor they used is the Intel Pentium 4 3.6Ghz 560J with HT Technology. The Hyper threading technology is very helpful and I’m glad they decided to use it because it really makes multi-tasking even with complex software faster and more efficient and significantly cuts down on the lag. The 3.6 Gigahertz processor is very very fast and can handle even the most multifaceted functions. The bus speed is also very impressive coming out with a total of 800 solid Megahertz’s. This is an extremely fast bus speed considering it only has one successor the 1066 Mhz speed.
Its Fourth-generation quad-core Intel Core i7 processor is remarkable for good performance and visuals. It enables the user to feel and see in high definition and 3D; and gives room for multitasking and media. The thrilling speeds are modeled for smooth and seamless games, photos and movies. The chip has a transistor count of 1.4 billion and a die size that is 177 square millimeters. Additionally, it has an incorporated processor graphics, and a dual-channel DDR3 support of up to 1600MHz (Williams & Sawyer, 2010).
The transistor was invented in 1947 but did not see widespread use in computers until the late 1950s. The transistor was far superior to the vacuum tube, allowing computers to become smaller, faster, cheaper, more energy-efficient and more reliable than their first-generation predecessors. Though the transistor still generated a great deal of heat that subjected the computer to damage, it was a vast improvement over the vacuum tube. Second-generation computers still relied on punched cards for input and printouts for output. Second-generation computers moved from cryptic binary machine language to symbolic, or assembly, languages, which allowed programmers to specify instructions in words. High-level programming languages were also being developed at this time, such as early versions of COBOL and FORTRAN. These were also the first computers that stored their instructions in their memory, which moved from a magnetic drum to magnetic core technology. The first computers of this generation were developed for the atomic energy
The computer has progressed in many ways, but the most important improvement is the speed and operating capabilities. It was only around 6 years ago when a 386 DX2 processor was the fastest and most powerful CPU in the market. This processor could do a plethora of small tasks and still not be working to hard. Around 2-3 years ago, the Pentium came out, paving the way for new and faster computers. Intel was the most proficient in this area and came out with a range of processors from 66 MHz-166 Mhz. These processors are also now starting to become obsolete. Todays computers come equipped with 400-600 Mhz processors that can multi-task at an alarming rate. Intel has just started the release phase of it’s new Pentium III-800MHz processor. Glenn Henry is