N-type metal-oxide-semiconductor logic uses n-type (-) MOSFETs (metal-oxide-semiconductor field-effect transistors) to implement logic gates and other digital circuits. These nMOS transistors operate by creating an inversion layer in a p-type transistor body. This inversion layer, called the n-channel, can conduct electrons between n-type "source" and "drain" terminals. The n-channel is created by applying voltage to the third terminal, called the gate. Like other MOSFETs, nMOS transistors have four modes of operation: cut-off (or subthreshold), triode, saturation (sometimes called active), and velocity saturation. For many years, NMOS circuits were much faster than comparable PMOS and CMOS circuits, which had to use much slower p-channel transistors. It was also easier to manufacture NMOS than CMOS, as the latter has to implement p-channel transistors in special n-wells on the p-substrate. The major drawback with NMOS (and most other logic families) is that a DC current must flow through a logic gate even when the output is in a steady state (low in the case of NMOS). This means static power dissipation, i.e. power drain even when the circuit is not switching. Additionally, just like in diode–transistor logic, transistor–transistor logic, emitter-coupled logic etc., the asymmetric input logic levels make NMOS and PMOS circuits more susceptible to noise than CMOS. These disadvantages are why CMOS logic has supplanted most of these types in most high-speed digital circuits such as microprocessors despite the fact that CMOS was originally very slow compared to logic gates built with bipolar transistors. (Wikipedia).
Logic for Programmers: Propositional Logic
Logic is the foundation of all computer programming. In this video you will learn about propositional logic. 🔗Homework: http://www.codingcommanders.com/logic.php 🎥Logic for Programmers Playlist: https://www.youtube.com/playlist?list=PLWKjhJtqVAbmqk3-E3MPFVoWMufdbR4qW 🔗Check out the Cod
From playlist Logic for Programmers
In this video, I explain and demonstrate how to use the Nmap scripting engine (NSE). Nmap is used to discover hosts and services on a computer network by sending packets and analyzing the responses. Nmap provides a number of features for probing computer networks, including host discovery
From playlist Nmap
Logic: The Structure of Reason
As a tool for characterizing rational thought, logic cuts across many philosophical disciplines and lies at the core of mathematics and computer science. Drawing on Aristotle’s Organon, Russell’s Principia Mathematica, and other central works, this program tracks the evolution of logic, be
From playlist Logic & Philosophy of Mathematics
How do we use transistors to create switches that can transmit arbitrary signals, whether analog or digital? The answer is the transmission gate. Also known as "pass transistor logic", the transmission gate allow for signals to be passed through or blocked depending on the control signal t
From playlist Digital Electronics
Why are NMOS transistors always connected to ground?
Why is it NMOS transistors are always connected near ground and PMOS transistors are connected to VDD? In this video, we explore this question, and how different transistor types complement each other, with NMOS' able to "pass" zeros well, and PMOS able to "pass" ones well. To support the
From playlist Digital Electronics
Nmap - HTTP Enumeration - Detecting HTTP Methods
In this video, I demonstrate how to detect the active HTTP methods on a web server with Nmap. Nmap is used to discover hosts and services on a computer network by sending packets and analyzing the responses. Nmap provides a number of features for probing computer networks, including host d
From playlist Nmap
How do we make a not gate out of transistors? In this video, we explore just how to do this, as well as the advantages of this type of design. This is a gate which has near zero power consumption, fast operation, and requires only two transistors, and is fundamental to many logic operation
From playlist Digital Electronics
This is a video I have been wanting to make for some time, in which I discuss what the quaternions are, as mathematical objects, and how we do calculations with them. In particular, we will see how the fundamental equation of the quaternions i^2=j^2=k^2=ijk=-1 easily generates the rule for
From playlist Quaternions
The Ultimate Guide to Propositional Logic for Discrete Mathematics
This is the ultimate guide to propositional logic in discrete mathematics. We cover propositions, truth tables, connectives, syntax, semantics, logical equivalence, translating english to logic, and even logic inferences and logical deductions. 00:00 Propositions 02:47 Connectives 05:13 W
From playlist Discrete Math 1
Lec 23 | MIT 6.002 Circuits and Electronics, Spring 2007
Energy, CMOS * Note: Lecture 24 is not available. View the complete course: http://ocw.mit.edu/6-002S07 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
From playlist MIT 6.002 Circuits and Electronics, Spring 2007
Introduction to Propositional Logic and Truth Tables
This video introduces propositional logic and truth tables. mathispower4u.com
From playlist Symbolic Logic and Proofs (Discrete Math)
How do we make the simplest possible not gate? Also called the psuedo-NMOS not gate, in this video we explore how to use a single transistor and a single resistor to create a logical 'not' function. To support the creation of videos like these, get early access, access to a community, be
From playlist Digital Electronics
Kodak Ektapro 4540 camera head teardown
A look inside the camera head of a 1993 Kodak high speed video system capable of 256x256 at 4500fps Paper on image sensor technologies http://www.motionvideoproducts.com/MVP%20papers/Kodak%20HS%204540%20KEY%20TECHNOLOGIES.pdf
From playlist Teardowns
Alkene Redox Reactions: Crash Course Organic Chemistry #17
Oxidation-reduction reactions are going on around us, and inside us, all the time, and we can make redox reactions in organic chemistry easier to understand by tracking carbon-oxygen bonds. In this episode of Crash Course Organic Chemistry, we’ll focus on alkene redox reactions and revisit
From playlist Organic Chemistry
Nmap - HTTP Enumeration - WAF Detection And Fingerprinting
In this video, I demonstrate how to detect and fingerprint web application firewalls with Nmap. Nmap is used to discover hosts and services on a computer network by sending packets and analyzing the responses. Nmap provides a number of features for probing computer networks, including host
From playlist Nmap
Reverse Engineering the Motorola MC14500 1-bit CPU
This is a special one! In this episode we tell one of the most epic stories and take a look at some truly amazing die shots of the Motorola MC14500 1-bit CPU. Some truly amazing people helped with this journey, so please, absolutely check out the links below! EDIT: Ken has hooked me up w
From playlist 1-Bit Breadboard Computer
HP 9825 Repair Part 2: Is Our Rare 16-Bit Processor Fried?
We repaired the supply in the previous episode, but it does not boot anymore. Did we actually fry its rare 16-bit hybrid processor? Many thanks to Antoine Bercovici for the magnificent pictures of the CPD microprocessor. Read about the HP 16-bit processor here: http://www.cpushack.com/20
From playlist HP 9825 Repair
Welcome to Zenmap for beginners! Zenmap is the official Nmap Security Scanner GUI. It is a multi-platform (Linux, Windows, Mac OS X, BSD, etc.) free and open source application which aims to make Nmap easy for beginners to use while providing advanced features for experienced Nmap users Nm
From playlist Ethical Hacking & Penetration Testing - Complete Course
In this video, I demonstrate how to perform FTP Enumeration with Nmap. Nmap is used to discover hosts and services on a computer network by sending packets and analyzing the responses. Nmap provides a number of features for probing computer networks, including host discovery and service an
From playlist Nmap
EEVblog #949 - Australian Made Vintage Laptop Teardown!
The Dulmont Magnum "Kookaburra" from 1983 is the only laptop to have even been design and made in Australia, as well as being one of the world's first "clamshell" laptop designs. Dave tears down this obscure retro classic based on the equally rare 80186. Brochure: http://www.eevblog.com/fi
From playlist Product Reviews & Teardowns