Introduction:
Transistor-transistor logic (TTL) is a class of digital circuits made from bipolar junction transistors (BJT) and resistors. This is termed as transistor–transistor logic since both the logic gating function (example: AND) and the amplifying function are executed by the transistors (contrary with DTL and RTL).
TTL is noteworthy for being a widespread integrated circuit (IC) family employed in most of the applications like computers, test equipment industrial controls, instrumentation, and the consumer electronics, synthesizers, and so on. The designation TTL is sometimes employed to mean TTL-compatible logic levels, even when not related directly with TTL integrated circuits, for illustration as a label on the inputs and outputs of the electronic instruments.
TTL became the base of computers and other digital electronics. Even subsequent to much larger scale integrated circuits build multiple-circuit-board processors obsolete, TTL devices still found widespread use as the "glue" logic interfacing more compactly integrated components. TTL devices were originally made up in ceramic and plastic dual-in-line (DIP) packages, and flat-pack form. TTL chips are now as well made up in surface-mount packages. Successors to initial bipolar TTL logic frequently are interchangeable in function with original circuits, however with enhanced speed or lower power dissipation.
Totem pole in TTL:What is totem pole?
The addition of an active pull up circuit in the output of a gate is termed as totem pole.
Why totem pole?
To raise the switching speed of the gate that is limited due to parasitic capacitance at the output.TTL Transistor switching trouble:
Solution:
Prevent the transistor from going deep in saturation. This is accomplished by preventing the BC junction from becoming the forward biased.
The Schottky diode is employed to do the above by placing it across BC junction. Since of its lower barrier potential, this will conduct current from the base directly to collector prior to BC is forward biased. Therefore fewer carriers are then stored in the collector region and the switching becomes much quicker.
Latest technology based Electrical Engineering Online Tutoring Assistance
Tutors, at the www.tutorsglobe.com, take pledge to provide full satisfaction and assurance in Electrical Engineering help via online tutoring. Students are getting 100% satisfaction by online tutors across the globe. Here you can get homework help for Electrical Engineering, project ideas and tutorials. We provide email based Electrical Engineering help. You can join us to ask queries 24x7 with live, experienced and qualified online tutors specialized in Electrical Engineering. Through Online Tutoring, you would be able to complete your homework or assignments at your home. Tutors at the TutorsGlobe are committed to provide the best quality online tutoring assistance for Electrical Engineering Homework help and assignment help services. They use their experience, as they have solved thousands of the Electrical Engineering assignments, which may help you to solve your complex issues of Electrical Engineering. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.
Biology of Major Economically Important Insects tutorial all along with the key concepts of Economic Classification of Insects, Injurious Insects, Beneficial Insects, Helpful Insects, Household and Disease Carrying Insects, Biology of a Honey Bee and Life cycle of a Honey Bee
www.tutorsglobe.com offers solutions and assignment help for special cases in simplex method, degeneracy, non-existing feasible solution, unbounded solution, multiple optimal solutions
Nature of Light tutorial all along with the key concepts of The Corpuscular Model, The Wave Model, Light as an Electromagnetic Wave, Energy Transfer: The Poynting Vector and Electromagnetic Spectrum
Theory and lecture notes of Application-Insurance Market all along with the key concepts of application-insurance market, Model of Insurance Market. Tutorsglobe offers homework help, assignment help and tutor’s assistance on Application-Insurance Market.
Network Analysis and Devices tutorial all along with the key concepts of Passive Components, Voltage and current sources, Circuits, Ohm's law, Kirchhoff's law, Node and Mesh analysis, Network theorems, Linearity, Superposition Theorem, Thevenin's Theorem and Norton's theorem
tutorsglobe.com dominant epistasis assignment help-homework help by online types of epistasis tutors
Reproduction in Angiosperms Main groups of Angiosperms, Sexual Reproduction in Angiosperms, Flower Structure, Male Gametophyte, Female Gametophyte and Asexual Reproduction
tutorsglobe.com trypanosoma brucei gambiense assignment help-homework help by online trypanosomes tutors
Polymers tutorial all along with the key concepts of Basics of Polymers, Classification of Polymers, Homopolymers, Copolymers, classification of polymers on Mode of Polymerization, classification of polymers on Physical property related to heating, Characteristics and Applications of Polymers
Forms of Carbohydrates tutorial all along with the key concepts of Importance of Carbohydrates, Classification of Carbohydrates, Ketoses, Anomeric Forms of Glucose and Cyclic Forms of Sugars
tutorsglobe.com nitrate assimilation assignment help-homework help by online nitrogen cycle tutors
www.tutorsglobe.com offers other object oriented issues homework help, assignment help, case study, writing homework help, online tutoring assistance by computer science tutors.
tutorsglobe.com classification of herpes virus assignment help-homework help by online herpes viruses tutors
www.tutorsglobe.com - offers cost allocation homework help, cost allocation assignment help, answering questions to cost allocation accounting problems, online tutoring by live online tutors.
online dat exam preparation course and online dat tutoring package offered by www.tutorsglobe.com are the most comprehensive and customized collection of study resources on the web, offering best collection of dat practice papers, quizzes, dat test papers, and guidance.
1930924
Questions Asked
3689
Tutors
1471818
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!