⇒ Kelvin's double bridge is used to measure low resistances becauseĮffect of contact and lead resistances is eliminated Generally less than that of a doped semiconductor ⇒ The conductivity of an intrinsic semiconductor is ⇒ When deflecting torque and braking torque in an energy meter are zero, ⇒ The magnitude plot of a composite signal x(t) = e 3 jt + e 4 jt is _. Reason (R): The graph theory helps in choosing independent variables in circuit analysis.īoth A and R are true and R is correct explanation of Aīoth A and R are true and R is not the correct explanation of A ⇒ Which of the following microphones has bidirectional feature?Īssertion (A): The number of basic loops is equal to number of links. ⇒ The poles with greater displacement from the real axis correspond to ⇒ The slope of the transfer characteristics of an N-channel JFET is ⇒ GaAs has an energy gap 1.43 eV the optical cut off wavelength of GaAs would lie in the The minimum number of equations required for solution of network is
⇒ The graph of a network has 6 branches with 3 tree branches.
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(opera, uc browser etc.) Download app for fast access + Download from play storeĪdd to Bookmark All Engineering + Electrical Computer Civil Mechanical Chemical Aotumobile Electronics Medical Science All Competitive exam data + Previous Papers Online Mock Test Vedic / Quicker Math Aptitude Reasoning General Knowledge English / Verbal Speak English Unit converter All Dictionary + Picture Dictionary English to Afrikaans English to Arabic English to Bengali English to Chinese English to English English to French English to German English to Gujarati English to Hindi English to Italian English to Japanese English to Kannada English to Korean English to Malayalam English to Marathi English to Nepali English to Portuguese English to Punjabi English to Russian English to Spanish English to Swedish English to Tamil English to Telugu English to Thai English to Turkish English to Urdu Know your baby name + Search baby / your name My Favorite List Teaching / Schooling Entertainment + Quotes (all category) Jokes (Hindi,Urdu,English) All Management courses + Marketing (HRM)Human Resource Management Web Tutorials + + Objective Questions (MCQ) All topics + Theory / Tutorial HTML CSS PHP JavaScript Read More My Account + My Account My Dictionary My Electrical Engg My Aptitude My English My General Knowledge Visit Contact us + Contact us / Help About us Privacy Policy About Copyright We can simplify its operation by considering the diode equivalent of the 2-input NPN transistor, as shown in the below figure.Login / Register Found site related problem + Download crome browser The circuit of a 2-input TTL NAND gate may look complex. Transistor Q 3 and Q 4 form the output side, called Totem pole output. Transistor Q 1 has 2-inputs on the emitter side. In the circuit shown below, the shaded portion shows the totem-pole output. The operation is the same as the 2-input TTL NAND gate. It is the same as that we discussed in the 2-input TTL NAND gate circuit, except that here, the input transistor Q 1 has three emitters instead of two. Is the input transistor the same as the NAND gate? In this Lab activity, the Transistor Transistor Logic (TTL) circuit inverter (NOT gate) and 2 input NAND gate configurations are examined. When was the first NAND gate in use?Ī variety of digital logic circuit techniques have been in use since the 1960s, when integrated logic gates were first produced.
An AND gate may be created by adding an inverter stage to the output of the NAND gate circuit. How do you make a TTL NAND gate?Ī TTL NAND gate can be made by taking a TTL inverter circuit and adding another input. A current flows through the 4.7k resistor through the base and collector of these transistors, and then through the base of the transistor on the right, saturating it and bringing the output down near ground. This is an NAND gate implemented using transistor-transistor logic. The output is taken between the emitter and collector of two different transistors. How does a TTL NAND gate work?Ī TTL NAND gate logic circuit has at least four bi polar junction transistors in which the input (transistor which receives input) has two emitters.
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