Multiplexers and flip flops, Electrical Engineering

Assignment Help:

  Decoders and multiplexers are termed, medium scale integration (MSI) devices; this term implies that the device is complex in construction and usually its operation as well. Below is shown a block diagram of a 2 -> 4 decoder    

729_Multiplexers and flip flops.png

The decoder can be thought of as a simple base 10 converter. The binary input's A, B select the base 10 equivalent output, namely O3-> O0. It should be noted that usually the decoder is active low outputs i.e. logic '0' for on and logic '1' for off. Various size decoders are available 2->4, 3->8, 4->16, and 4->10. The operation is made easy by considering the truth table for a 2->4 decoder: -   

185_Multiplexers and flip flops1.png

               
Within logic we also have sequential logic circuits, the building blocks of these MSI devices are flip flops. There are four basic flip flops namely:
 
            SR Flip flop
            JK Flip flop
            D-type
            T-type
 
Note the following truth tables shown below are only valid if the clock is active (usually active low).The operation of these devices are simple in that the devices either stores the last value (i.e. doesn't change), resets, sets, or toggles (i.e. output inverts itself).

180_Multiplexers and flip flops2.png

 

It should be noted that the CMOS and TTL logic families have sequential logic within their families and they usually have asynchronous preset (PR) and clear (CL). Let us consider some simple applications of sequential logic.


Related Discussions:- Multiplexers and flip flops

Common drain amplifier, Common Drain Amplifier In electronics, a comm...

Common Drain Amplifier In electronics, a common-drain amplifier, as well termed as a source follower, is one type of three basic single-stage field effect transistor (FET) am

Show procedure of divide the decimal number by 2, Q. Show procedure of divi...

Q. Show procedure of divide the decimal number by 2? For this procedure (method), divide the decimal number by 2, if the remainder is 0, on the side write down a 0. If the rema

Show the procedure of octal to decimal conversion, Q. Show the procedure of...

Q. Show the procedure of Octal to Decimal Conversion? To convert from Octal to Decimal, multiply the value in every position by its Octal weight and add each value. Using the v

Explain the suitability of aluminium, Explain the suitability of aluminium ...

Explain the suitability of aluminium  that is used as electrical conducting materials. Aluminium : Conductors are appropriate for ambient and very high temperature. Use of alu

Determine the expected voltage levels at the output, The subsequent voltage...

The subsequent voltage-source multiplying DAC is to be utilized to convert the digital data stream "11" and "01" to an analog signal.  It has 2-bit inputs and hence is capable of c

Find the power supplied by the voltage source, Find the power supplied by t...

Find the power supplied by the voltage source and the power absorbed by the 24 Ω resistor (R3) in the circuit shown below:   Determine the voltage V2 in the circuit shown.

What is the significance of negative voltage, Q. What is the significance o...

Q. What is the significance of giving a negative voltage to the gate higher than that of the source?  This is done to reach the saturation at a lower of level of V DS .  The re

Sketch the phasor diagram of the voltage, Q. The line-to-line voltage of a ...

Q. The line-to-line voltage of a balanced wye connected three-phase source is given as 100 V. Choose V AB as the reference. (a) For the phase sequence A-B-C, sketch the phasor

Define asynchronous communication with serial communication, With respect t...

With respect to serial communication define the asynchronous communication. Asynchronous implies "no synchronization", and therefore does not require sending and receiving idl

Requirement of a hybrid in telephone networks, Q. What is the requirement o...

Q. What is the requirement of a hybrid in telephone networks? How does it work? Ans: Digital exchanges require receive and transmit signals on separate two-wire circuits. Th

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd