MOS Transistor Inverter:
The inverter is globally accepted as the most fundamental logic gate doing a Boolean operation on a single input variable. Figure below depicts the symbol, truth table and a common structure of a CMOS inverter. As shown, the simple structure comprises of a combination of a pMOS transistor at the top and an nMOS transistor at bottom.
CMOS is as well sometimes termed to as complementary-symmetry metal oxide semiconductor. The term "complementary-symmetry" refer to the fact that the usual digital design style with CMOS employs complementary and symmetrical pairs of n-type and p-type metal oxide semiconductor field effect transistors (or MOSFETs) for logic functions. Two significant characteristics of CMOS devices are high noise immunity and low static power consumption. Significant power is merely drawn while the transistors in CMOS device are switching between on and off states. As a result, CMOS devices do not generate as much waste heat as other forms of logic, for illustration transistor-transistor logic (TTL) or NMOS logic that uses all n-channel devices devoid of p-channel devices.
Inverter Dynamic Characteristics:
Figure above shows the dynamic characteristics of CMOS inverter. The following are a few formal definitions of temporal parameters of the digital circuits. All percentages are of steady state values.
Rise Time (tr): Time taken to mount from 10% to 90%.
Fall Time (tf): Time taken to drop from 90% to 10%.
Edge Rate (trf): (tr + tf )/2.
High-to-Low propagation delay (tpHL): Time taken to drop from VOH to 50%.
Low-to-High propagation delay (tpLH): Time taken to mount from 50% to VOL.
Propagation Delay (tp): (tpHL + tpLH)/2.
Contamination Delay (tcd): It is the minimum time from the input crossing 50% to the output crossing of 50%.
Power dissipation analysis of the CMOS inverter
As we know that, the CMOS inverter exhibits very low power dissipation whenever in proper operation. However, the power dissipation is virtually zero (0) if operating close to VOH and VOL. The following graph exhibits the drain to source current (efficiently the total current of the inverter) of NMOS as a function of input voltage. Note that the current in far left and right regions (low and high VIN correspondingly) encompass low current, and the peak current in middle is just .232mA (1.16mW power dissipation).
Conclusion:
The CMOS inverter is a significant circuit device that gives high buffer margins, quick transition time, and low power dissipation: all three of such are desired qualities in inverters for most of the circuit design. It is quite obvious why this inverter has become as admired as it is.
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.
Availing the premium Equilibrium Price Assignment Help service is the best choice to attain notable grades at reasonable prices
The limitations of diagrammatic presentation of cost information - Diagrams and graphs do not depict perfectly accurate data. They are usually based on approximations. So these are suitable for general guidance and not for taking particular decisions.
www.tutorsglobe.com offers effective modular design heuristics homework help, assignment help, case study, writing homework help, online tutoring assistance by computer science tutors.
tutorsglobe.com oxidative deamination assignment help-homework help by online metabolism of proteins tutors
Complete your assignments with PhD Number Theory Assignment Help experts and score top grades with 24x7 support at reasonable prices.
Theory and lecture notes of Database system environment all along with the key concepts of database system environment, DBMS Component Modules. Tutorsglobe offers homework help, assignment help and tutor’s assistance on database system environment.
www.tutorsglobe.com offers hydroboration reactions homework help, hydroboration reactions assignment help, online tutoring assistance, organic chemistry solutions by online qualified tutor's help.
tutorsglobe.com heavy metals assignment help-homework help by online control of microorganisms tutors
Biochemical Parameters in Water Chemistry Winkler Method, Methods of DO Determination, Azide Modification of the Winkler Method, Measuring the BOD, Application of BOD Data, Inorganic interferences, Applications of COD Data
www.tutorsglobe.com offers rectilinear figures homework help, rectilinear figures assignment help, online tutoring assistance, geometry mathematics solutions by online qualified math tutor's help.
properties of amino acids tutorial all along with the key concepts of physical properties of amino acids, optical activity of amino acids, absorption of light by amino acids, acid-base property of amino acids and titration curve of simple amino acids
tutorsglobe.com re-absorption in proximal convoluted tubule assignment help-homework help by online excretion tutors
www.tutorsglobe.com offers substitution of the hydroxyl group homework help, assignment help, online tutoring assistance, organic chemistry solutions by online qualified tutor's help.
Seed Plants tutorial all along with the key concepts of Characteristics of Seed Plants, Gymnosperms, Conifers, Angiosperm Categorization, characteristics of Angiosperms, Terrestrial Adaptation of Vascular Plant
tutorsglobe.com laboratory diagnosis assignment help-homework help by online herpes viruses tutors
1950666
Questions Asked
3689
Tutors
1444919
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!