One early form of dtl, used by ibm corp in the 360 family of computers, was. A look at the circuits that let a computer work 119. Ee6301 syllabus digital logic circuits pdf free download. A family of diode logic and diodetransistor logic integrated circuits was developed by texas instruments for the d37c minuteman ii guidance computer in 1962, but these devices were not. Resistortransistor logic rtl is a class of digital circuits built using resistors as the input network and bipolar junction transistors bjts as switching devices. The diodes either conduct or cut off and produce the desired output from the transistor. Rtl was followed by diodetransistor logic and transistortransistor logic see dtl and ttl. Rtl gates are now seldom used, if at all, in modern digital electronics design because it has several drawbacks, such as bulkiness, low speed, limited fanout, and poor. Download book pdf digital electronic circuits and systems pp 3650 cite as.
Furthermore, their outputs can switch voltages up to 24v atcurrents as high as 10 ma. Vit university 14 transistortransistor logic ttl is a class of digital circuits built from bipolar junction transistors bjt and resistors. Resistortransistor logic rtl diode transistor logic dtl emitter coupled logic ecl logic families can be classified broadly according to the technologies they are built with transistortransistor logic ttl cmos logic ttl and cmos logic family is most widely used ic technologies. The digital logic gate is the basic building block from which all digital electronic circuits and microprocessor based systems are constructed from. 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 Rtl was superceded in the 1960s by diodetransistor logic and then transistortransistor logic, dtl and ttl respectively.
An indepth coverage of circuit packaging can be found in neets, module 14, introduction to microelectronics. Click on the inputs on the left to toggle their state. A basic knowledge of electrical circuits is assumed. One example is the philips norbits family of logic building blocks. Because of this diodetransistor logic dtl rapidly replaced rtl in most digital applications. Ee8351 digital logic circuits syllabus notes qp qb pdf anna.
When all of the inputs are high, the output is low. Rtl is the earliest class of transistorized digital logic circuit used. The main difference in behavior between rtl and dtl circuits is that with rtl, an open input connection provides no drive to the transistor, so it is read as a logic 0. Download link is provided and students can download the anna university ee6301 digital logic circuits dlc syllabus question bank lecture notes syllabus part a 2 marks with answers part b 16 marks question bank with answer, all the materials are listed below for the students to make use of it and score good maximum marks with our study materials. Pulse and digital circuits pdf notes pdc pdf notes. Because of this diode transistor logic dtl rapidly replaced rtl in most digital applications. Diodetransistor logic dtl was invented in the 1950s. For the love of physics walter lewin may 16, 2011 duration. Dtl is normally found in dualinline packages dip as well as older discrete component logic. Nov 07, 2017 prebook pen drive and g drive at teacademy.
A digital logic gate is an electronic circuit which makes logical decisions based. In, anna university 3rd semester engineering students can also download ee8351 m3 syllabus, notes, question banks, previous year question papers and important questions regulation 2017. Dtl was initially made with discrete transistors and resistors before being integrated onto silicon. This is an nand gate implemented using diodetransistor logic. Rtl circuits were first constructed with discrete components, but in 1961 it became the first digital logic family to. The ie digitallogic families to be considered here are. The input is connected through a pair of diodes in series with the base of the transistor. Pdf1 pdc notes pulse and digital circuits notes pdf free. Rtl circuits consist of resistors and transistors and was the earliest logic family to be integrated.
The characteristics of rtl, dtl, ecl, ttl and cmos are. The evolution from dtl to ttl can be seen by observing the placement of pn junctions. Dtl diode transistor logic input signals are applied to diodes in this logic family. Diode transistor logic gates the diode transistor logic gates or dtl gates implement the boolean functions nor and nand. Rtl and dtl circuits 409 transistortransistor logic ttl emmittercoupled logic ecl metaloxide semiconductor mos 412 422 424 complementary mos cmos 427 109 cmos transmission gate circuits 430 references 433 problems 434 11 laboratory experiments 110 introduction to experiments 436 111 112 1 114. Inverters not, non inverters buffers, and, or, nand, and nor gates can all be constructed with rtl logic. Pdf on apr 20, 2017, shree krishna khadka and others published comparison of ic logic families find, read. Electronic circuits pdf is a great book for electronic circuits enthusiasts who are keen to learn electronic and electrical circuit. Dtl inverter circuit the dtl inverter uses a transistor and a collector load resistor as shown in the circuit diagram.
Jan 26, 2018 for the love of physics walter lewin may 16, 2011 duration. Lm311 datasheet14 pages philips voltage comparator. Brief overview design flow benefits the goal of this tutorial is to provide a quic k introduction to the main capabilities of the schematic viewer available from the ise design suite and how you can use these. Digital logic circuits are manufactured depending on the specific circuit technology or logic families. Rtlresistor transistor logic dtldiode transistor logic ttltransistortransistor logic eclemitter coupled logic cmoscomplementary metal oxide semiconductor logic out of these rtl and dtl are rarely used. This also makes the open rtl input susceptible to certain kinds of noise signals, so that an open rtl input can introduce spurious signals under some conditions. It is a major improvement over dl and rtl because it eliminates signal degradation and reduces power dissipation by means of a transistor which restores digital values and a set of input diodes which replace input resistors. Ee8351 digital logic circuits syllabus tpde is available in pdf format.
Thecircuits can drive rtl, dtl or ttl integrated circuits directly. The ic digital logic families to be considered here are. Some circuits are manufactured as integrated circuits and packaged in modified transistor outline to packages, as shown in figure 335. Ee6301 digital logic circuits syllabus regulation 20 anna. It is called so because the logic gating function e. Resistortransistor logic rtl resistortransistor logic, or rtl, refers to the obsolete technology for designing and fabricating digital circuits that employ logic gates consisting of nothing but transistors and resistors. The first diodetransistor logic family of integrated circuits was introduced by signetics in 1962. Diodetransistor logic, or dtl, refers to the technology for designing and fabricating digital circuits wherein logic gates employ both diodes and transistors. Download link is provided and students can download the anna university ee8351 digital logic circuits dlc syllabus question bank lecture notes part a 2 marks with answers part b marks and part c 15 marks question bank with answer, all the materials are listed below for the students to make use of it and score good maximum marks with our study materials. Dtl offers better noise margins and greater fanouts than rtl, but suffers from low speed, especially in comparison to ttl.
Ee6301 digital logic circuits previous year question papers. A basic circuit of an rtl nor gate consists of two transistors q1 and q2, connected as shown in figure above. Rtl was made from discrete transistors and resistors and manufactured on printed circuit boards with several gates per board. This is an nand gate implemented using resistortransistor logic, the earliest form of logic implemented with transistors. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext.
Here you can download the free lecture notes of pulse and digital circuits pdf notes pdc pdf notes materials with multiple file links to download. The families rtl, dtl, and ecl were derived from the logic circuits used in early computers, originally implemented using discrete components. In digital logic design only two voltage levels or states are allowed and these states are generally. Ttl logic family logic gate integrated circuit scribd. Diodetransistor logic dtl is a class of digital circuits that is the direct ancestor of transistortransistor logic. There are several ttl subfamilies or series of the ttl technology. Rtl gates are now seldom used, if at all, in modern digital electronics design because it has several drawbacks, such as.
Each gate performs the nand nor logical function using rtl circuitry. Resistortransistor logic rtl diodetransistor logic dtl emitter coupled logic ecl logic families can be classified broadly according to the technologies they are built with transistortransistor logic ttl cmos logic ttl and cmos logic family is most widely used ic technologies. Dtl has two variants that attempt to improve some of its aspects. Ranging from miniature circuits to high end computers, the use of digital electronics is tremendous. Common families are rtl resistor transistor logic dtl diode. It is called transistortransistor logic because both the logic gating function e. Pulse and digital circuits notes pdf pdc notes pdf book starts with the topics.
Xilinx rtl and technology schematic viewers tutorial. Chapter 5 diode transistor logic university of babylon. Pdf ee6301 digital logic circuits dlc books, lecture. Logic families electronics sandeep kumar singh bca iind semester 2. Pdf pulse and digital circuits pdf notes pdc notes 2019. Dtl offers better noise margins and greater fanouts than rtl resistor transistor logic, but suffers from low speed, especially in comparison to ttl. When either of input x or y is driven high, corresponding transistor is goes to saturation and output z is pulled to low. This is a diodetransistor logic dtl nor gate circuit using a generalpurpose bipolar junction transistor bc547, and generalpurpose diodes 1n4148. Supply voltage shown as 5v but rtl gates can operate on voltages as low as 1v and as. Digital logic gate tutorial basic logic gates electronicstutorials.
Introduction a logic family of monolithic digital integrated circuit devices is a group of electronic logic gates constructed using one of several different designs, usually with compatible logic levels and power supply characteristics within a family a logic family may also refer to a set of techniques. Diode transistor logic dtl was invented in the 1950s. Their output is compatible with rtl, dtl, and ttl as well as mos. Rtl is normally constructed from discrete components individual resistors and transistors. Ee6301 digital logic circuits syllabus regulation 20 anna university free download. Diode transistor logic 1 chapter 5 diode transistor logic resistortransistor logic was an early form of logic used in the 1950s and early 1960s. Within each family, several subfamilies of logic types are. Linear waveshaping high pass, low pass rc circuits, their response for sinusoidal, step, pulse, square and. Ttl transistortransistor logic families history and. This page shows how to make this circuit, and the implementation is on a breadboard using discrete components. The uncommitted collector of the output stage makes the lm119 compatible with rtl, dtl, and ttl, as well as capable of driving lamps and relays at currents of up to 25 ma. As the name implies, circuits of the resistortransistor logic family are constructed from resistors and transistors bjts. Basic digital logic gates perform logical operations of and, or and not on binary numbers.
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