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Don Lancaster
Donald E. Lancaster is an American author, inventor, and microcomputer pioneer. Background Lancaster is a writer and engineer, who authored multiple articles for computer and electronics magazines of the 1970s, including ''Popular Electronics'', ''Radio Electronics'', ''Dr. Dobb's Journal'', '' 73 Magazine'', and ''Byte''. He has written books on electronics, computers, and entrepreneurship, both commercially published and self-published. An early project was his "TV Typewriter" dumb terminal. This design was accepted by early microcomputer users as it used an ordinary television set for the display, and could be built with around US $200 in parts, at a time when commercial terminals were selling for over US $1,000. Lancaster was an early advocate and developer of what is now known as print-on-demand technology. Lancaster produced his self-published books by re-purposing the game port of an Apple II to transfer PostScript code directly to a laser printer, rather than using a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brackets
A bracket is either of two tall fore- or back-facing punctuation marks commonly used to isolate a segment of text or data from its surroundings. Typically deployed in symmetric pairs, an individual bracket may be identified as a 'left' or 'right' bracket or, alternatively, an "opening bracket" or "closing bracket", respectively, depending on the Writing system#Directionality, directionality of the context. Specific forms of the mark include parentheses (also called "rounded brackets"), square brackets, curly brackets (also called 'braces'), and angle brackets (also called 'chevrons'), as well as various less common pairs of symbols. As well as signifying the overall class of punctuation, the word "bracket" is commonly used to refer to a specific form of bracket, which varies from region to region. In most English-speaking countries, an unqualified word "bracket" refers to the parenthesis (round bracket); in the United States, the square bracket. Glossary of mathematical sym ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amateur Radio
Amateur radio, also known as ham radio, is the use of the radio frequency spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emergency communications. The term "amateur" is used to specify "a duly authorised person interested in radioelectric practice with a purely personal aim and without pecuniary interest;" (either direct monetary or other similar reward) and to differentiate it from commercial broadcasting, public safety (such as police and fire), or professional two-way radio services (such as maritime, aviation, taxis, etc.). The amateur radio service (''amateur service'' and '' amateur-satellite service'') is established by the International Telecommunication Union (ITU) through the Radio Regulations. National governments regulate technical and operational characteristics of transmissions and issue individual station licenses with a unique identifying call sign, which mus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Living People
Related categories * :Year of birth missing (living people) / :Year of birth unknown * :Date of birth missing (living people) / :Date of birth unknown * :Place of birth missing (living people) / :Place of birth unknown * :Year of death missing / :Year of death unknown * :Date of death missing / :Date of death unknown * :Place of death missing / :Place of death unknown * :Missing middle or first names See also * :Dead people * :Template:L, which generates this category or death years, and birth year and sort keys. : {{DEFAULTSORT:Living people 21st-century people People by status ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Technology Writers
American(s) may refer to: * American, something of, from, or related to the United States of America, commonly known as the "United States" or "America" ** Americans, citizens and nationals of the United States of America ** American ancestry, people who self-identify their ancestry as "American" ** American English, the set of varieties of the English language native to the United States ** Native Americans in the United States, indigenous peoples of the United States * American, something of, from, or related to the Americas, also known as "America" ** Indigenous peoples of the Americas * American (word), for analysis and history of the meanings in various contexts Organizations * American Airlines, U.S.-based airline headquartered in Fort Worth, Texas * American Athletic Conference, an American college athletic conference * American Recordings (record label), a record label previously known as Def American * American University, in Washington, D.C. Sports teams Soccer * B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Active Filter
An active filter is a type of analog circuit implementing an electronic filter using active components, typically an amplifier. Amplifiers included in a filter design can be used to improve the cost, performance and predictability of a filter. An amplifier prevents the load impedance of the following stage from affecting the characteristics of the filter. An active filter can have complex poles and zeros without using a bulky or expensive inductor. The shape of the response, the Q (quality factor), and the tuned frequency can often be set with inexpensive variable resistors. In some active filter circuits, one parameter can be adjusted without affecting the others.Don Lancaster, ''Active-Filter Cookbook'', Howard W. Sams and Co., 1975 pages 8-10 Types Using active elements has some limitations. Basic filter design equations neglect the finite bandwidth of amplifiers. Available active devices have limited bandwidth, so they are often impractical at high frequencies. Amplifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CMOS
Complementary metal–oxide–semiconductor (CMOS, pronounced "sea-moss", ) is a type of metal–oxide–semiconductor field-effect transistor (MOSFET) fabrication process that uses complementary and symmetrical pairs of p-type and n-type MOSFETs for logic functions. CMOS technology is used for constructing integrated circuit (IC) chips, including microprocessors, microcontrollers, memory chips (including CMOS BIOS), and other digital logic circuits. CMOS technology is also used for analog circuits such as image sensors (CMOS sensors), data converters, RF circuits (RF CMOS), and highly integrated transceivers for many types of communication. The CMOS process was originally conceived by Frank Wanlass at Fairchild Semiconductor and presented by Wanlass and Chih-Tang Sah at the International Solid-State Circuits Conference in 1963. Wanlass later filed US patent 3,356,858 for CMOS circuitry and it was granted in 1967. commercialized the technology with the trademark "COS-MO ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transistor–transistor Logic
Transistor–transistor logic (TTL) is a logic family built from bipolar junction transistors. Its name signifies that transistors perform both the logic function (the first "transistor") and the amplifying function (the second "transistor"), as opposed to earlier resistor–transistor logic (RTL) and diode–transistor logic (DTL). TTL integrated circuits (ICs) were widely used in applications such as computers, industrial controls, test equipment and instrumentation, consumer electronics, and synthesizers. After their introduction in integrated circuit form in 1963 by Sylvania Electric Products, TTL integrated circuits were manufactured by several semiconductor companies. The 7400 series by Texas Instruments became particularly popular. TTL manufacturers offered a wide range of logic gates, flip-flops, counters, and other circuits. Variations of the original TTL circuit design offered higher speed or lower power dissipation to allow design optimization. TTL devices were original ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Resistor–transistor Logic
Resistor–transistor logic (RTL) (sometimes also transistor–resistor logic (TRL)) is a class of digital circuits built using resistors as the input network and bipolar junction transistors (BJTs) as switching devices. RTL is the earliest class of transistorized digital logic circuit; it was succeeded by diode–transistor logic (DTL) and transistor–transistor logic (TTL). RTL circuits were first constructed with discrete components, but in 1961 it became the first digital logic family to be produced as a monolithic integrated circuit. RTL integrated circuits were used in the Apollo Guidance Computer, whose design begun in 1961 and which first flew in 1966. Implementation RTL inverter A bipolar transistor switch is the simplest RTL gate (inverter or NOT gate) implementing logical negation. It consists of a common-emitter stage with a base resistor connected between the base and the input voltage source. The role of the base resistor is to expand the very small transi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arizona State University
Arizona State University (Arizona State or ASU) is a public research university in the Phoenix metropolitan area. Founded in 1885 by the 13th Arizona Territorial Legislature, ASU is one of the largest public universities by enrollment in the U.S. One of three universities governed by the Arizona Board of Regents, ASU is a member of the Universities Research Association and classified among "R1: Doctoral Universities – Very High Research Activity". ASU has nearly 150,000 students attending classes, with more than 38,000 students attending online, and 90,000 undergraduates and nearly 20,000 postgraduates across its five campuses and four regional learning centers throughout Arizona. ASU offers 350 degree options from its 17 colleges and more than 170 cross-discipline centers and institutes for undergraduates students, as well as more than 400 graduate degree and certificate programs. The Arizona State Sun Devils compete in 26 varsity-level sports in the NCAA Division I Pac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lafayette College
Lafayette College is a private liberal arts college in Easton, Pennsylvania. Founded in 1826 by James Madison Porter and other citizens in Easton, the college first held classes in 1832. The founders voted to name the college after General Lafayette, a hero of the American Revolution. Lafayette is considered a Hidden Ivy as well as one of the northeastern Little Ivies. Located on College Hill in Easton, the campus is in the Lehigh Valley, about west of New York City and north of Philadelphia. Lafayette College guarantees campus housing to all enrolled students. The college requires students to live in campus housing unless approved for residing in private off-campus housing or at home as a commuter. The student body, consisting entirely of undergraduates, comes from 46 U.S. states and territories and nearly 60 countries. Students at Lafayette have access to more than 250 clubs and organizations, including athletics, fraternities and sororities, special interest groups, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wexford, Pennsylvania
Wexford is an unincorporated community in Allegheny County, Pennsylvania, United States. The area known as Wexford is split among multiple municipalities, including Franklin Park, McCandless Township, Pine Township, and Marshall Township. It is named after County Wexford in Ireland. Home to many upper-middle-class people, Wexford's commercial landscape is dominated by a mixture of corporate chains, car dealerships, and a number of local small businesses, giving this small town much diversity. Wexford concentrated on the main thoroughfare of the "Wexford Flats", U.S. Route 19. It is also home to North Allegheny Senior High School, Pine-Richland High School, Eden Hall Upper Elementary School, Marshall Middle School, Eden Christian Academy, (Wexford) Elementary School, and Vincentian Academy. It was ranked the twenty-eighth best place to live by Money magazine in 2005, despite it being essentially a postal zip code and a general descriptor of a section of the suburban Pittsbur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Allegheny Senior High School
North Allegheny Senior High School (NASH) is a suburban high school in the North Allegheny School District and is located in Wexford, Pennsylvania, a northern suburb of Pittsburgh, Pennsylvania. The current building was built in 1974. In 2013, enrollment was 1,277 pupils in grades 11th and 12th, with 3% of pupils from a low income home. In 2013, North Allegheny Senior High School employed 98 teachers. The feeder school is North Allegheny Intermediate High School which provides grades 9th and 10th. According to the National Center for Education Statistics, in 2010, North Allegheny Senior High School reported an enrollment of 1,314 pupils in grades 11th and 12th. The school employed 98 teachers, yielding a student–teacher ratio of 13:1. Former principal Dr. Lawrence Butterini was recognized by the Pennsylvania Association of Elementary and Secondary School Principals as the Pennsylvania High School Principal of the Year in 2006. Butterini was NASH principal and a figurehead of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
