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Computer&Electronics
Italy
เข้าร่วมเมื่อ 7 พ.ค. 2011
This channel is about electronics and computers, explained in plain english. If you study electronics or computer science or if you are just curious, this channel could interest you.
Binary adder - Carry Look-Ahead Delay - CLA delay
Addition is the most commonly used arithmetic operation and it is also the speed-limiting element, while making faster VLSI processors. As the demand for higher performance processors grows, there is a continuing need to improve the performance and functionality of arithmetic units like adders. In this video we see quickly the carry ripple propagation problem and we calculate the delay of the standard Carry look-Aahead adder so in the next video we see the Manchester Carry Chain: a logic to speed up the carry look-ahead adder.
Carry look-ahead playlist: th-cam.com/play/PLnAxReCloSeSPz0T6HINK_NsZDfTfGkLQ.html&si=mKlH044tMQwFKvcy
Carry look-ahead playlist: th-cam.com/play/PLnAxReCloSeSPz0T6HINK_NsZDfTfGkLQ.html&si=mKlH044tMQwFKvcy
มุมมอง: 106
วีดีโอ
555 Integrated Circuit - Iconic IC - timer, oscillator, bistable
มุมมอง 49514 วันที่ผ่านมา
The 555 timer IC is an integrated circuit used in a variety of timer, delay, pulse generation, and oscillator applications. It is one of the most popular timing ICs due to its flexibility and price. It was designed in 1970 by Hans R. Camenzind under contract to Signetics Corporation. Today - half a century later - it is still an immensely popular circuit building block. According to Camenzind t...
ua741 Operational Amplifier - Op-Amp internal schematic - full explanation of the most popular OpAmp
มุมมอง 851หลายเดือนก่อน
This video explains the internal working of the most famous and popular Operational Amplifier: the μA741. This Operational amplifier, designed by Dave Fullagar in 1968 at Fairchild Semiconductor, owes its success to the intuition of inserting the compensation capacitor inside the chip, instead of requiring external compensation. This simple difference has made the μA741 the standard op amp. We ...
bandgap reference - voltage reference - voltage source - start-up circuit
มุมมอง 9102 หลายเดือนก่อน
This video talks about Bandgap reference. Voltage references, independent from temperature, process and supply are very important in electronics. The bandgap reference is a good way to produce voltage references with a very little temperature dependence and therefore also a very little process dependence. Wilson current mirror: th-cam.com/video/iMaGTSAGVmo/w-d-xo.html Bibliography : Design of A...
Inside the Op-Amp - Operational Amplifier internal
มุมมอง 1.4K3 หลายเดือนก่อน
This video explains the internal working of the Operational Amplifier. The Op-Amp is a foundamental building block of analog electronics used in numerous applications. The key characteristic is its huge gain which makes this device mostly used with a feedback. We see a basic Op-Amp in CMOS technology focusing on the gain and on the compensation capacitor. Current mirror: th-cam.com/video/HNaR60...
Sallen-Key Active Filter
มุมมอง 7633 หลายเดือนก่อน
This video talks about Sallen-Key active filters. This is a simple topology used to implement second order active filters. We see why you use active filters instead of the passive ones and the transfer function of this particular second order low-pass filter. From capacitor to passive filters: th-cam.com/video/SfHEcOZId-I/w-d-xo.html Miller Effect: th-cam.com/video/TD3jhSzOdqI/w-d-xo.html Negat...
From capacitor to passive filters - impedance, reactance and high order filter issues
มุมมอง 1964 หลายเดือนก่อน
This video talks about passive filters starting from the inner properties of capacitors to high order filters. We explains why current flows in a circuit although the presence of the capacitor and why this foundamental element is used to create filters allowing only some frequencies to pass. We approch filters of second order and the problem you face in building filter of high order. Miller eff...
Log amplifier
มุมมอง 5404 หลายเดือนก่อน
This video talks about Logarithmic amplifier built with Op-Amps. A log amplifier is an amplifier in which the output voltage is the natural log of the input voltage. It is used in analog computer, audio synthesis methods and to perform mathematical operations such multiplication and the raising to the power.
Phase Locked Loop - basic principle - Digital PLL
มุมมอง 1.9K5 หลายเดือนก่อน
A phase locked loop is a device which generates a clock and sychronizes it with an input signal. The input signal can be data or another clock. A very common application is frequency synthesis. In frequency synthesis PLLs are used to generate a clock which is based on a clock already existing. Often the newly generated clock will be at a multiple of the original frequency and this is what the v...
Feedback stability - feedback compensation - capacitor compensation
มุมมอง 3605 หลายเดือนก่อน
In this video we continue to talk about feedback, covering the feedback stability and feedback compensation topic. feedback amplifier and feedback advantages : th-cam.com/video/gVrJmlx4yJw/w-d-xo.html
Negative resistance
มุมมอง 1.2K6 หลายเดือนก่อน
This video talks about negative resistance. Static resistance determines the power dissipation in a component. Passive devices, which consume electric power, have positive static resistance; while active devices, which produce electric power, do not. But usually when in electronics you talk about negative resistance you mean negative differential resistance which can be found, for example, in t...
feedback amplifier - negative feedback characteristics - feedback propriety
มุมมอง 5946 หลายเดือนก่อน
This video talks about feedback, in particular negative feedback in amplifiers. Feedback is a very powerful concept and has numerous applications. By definition, feedback is the process of combining the output of a system with its input. it can be said that feedback stabilizes a system. However, not all types of feedback have this property. There are two types of feedback: positive and negative...
Miller effect made easy - Miller theorem - cascode amplifier
มุมมอง 2.5K7 หลายเดือนก่อน
This video talks about the Miller effect which is very important when you want to analize the frequency beahvior of a circuit. The Miller effect is a powerfull approximation you use when a capacitance is in the gain path of a circuit. When the gain is negative the capacitance is magnified so this metod makes easy to find the dominant poles simply by inspection. We see an example of Miller effec...
Analog Comparator high performance Differential Amplifier
มุมมอง 1.4K7 หลายเดือนก่อน
Analog Comparator high performance Differential Amplifier
Differential Amplifier - the real working
มุมมอง 1.7K8 หลายเดือนก่อน
Differential Amplifier - the real working
Gilbert Cell - Mixer - Analog Multiplier
มุมมอง 5K9 หลายเดือนก่อน
Gilbert Cell - Mixer - Analog Multiplier
Binary Adder - Ripple Carry Adder and its delay
มุมมอง 81110 หลายเดือนก่อน
Binary Adder - Ripple Carry Adder and its delay
CMOS Schmitt trigger and its application
มุมมอง 5K10 หลายเดือนก่อน
CMOS Schmitt trigger and its application
Binary Adder - Carry Skip Adder (Carry bypass adder)
มุมมอง 3.4K10 หลายเดือนก่อน
Binary Adder - Carry Skip Adder (Carry bypass adder)
PLL - Voltage Controlled Oscillator - Source Coupled VCO
มุมมอง 90411 หลายเดือนก่อน
PLL - Voltage Controlled Oscillator - Source Coupled VCO
Binary Adder - Carry Look Ahead Adder vs Ripple Carry Adder
มุมมอง 2.4K11 หลายเดือนก่อน
Binary Adder - Carry Look Ahead Adder vs Ripple Carry Adder
PLL - Voltage Controlled Oscillator - Current starved VCO
มุมมอง 7K11 หลายเดือนก่อน
PLL - Voltage Controlled Oscillator - Current starved VCO
Nice presentation
Thanks a lot
This video saves me. Thank you.
You're welcome
God bless you my brother. You saved my fucking ass because of your video. My semester project about differential amplifier design is done by this video. God bless you again.
😄 Happy to be helpful
great video, very informative
Thank you
Thank you, this saved me so much time.
You're welcome!
You need to indicate the "Q" output and the "CLR" inputs on your FF boxes.
You're right
grazie mille frate buon video
Prego
جيد جداً وشرح ممتاز
Thank you
Thank you very much! Very helpful videos.
You are welcome!
You are great and oppressed at once . Where are you from?
Italy
@Computer-and-Electronics great accent and great content 👌 👏
Thank you
@@Computer-and-Electronics Prego and most welcome
I am trying to build this circuit, but I'm having difficulties implementing it with the commercially available components. It seems that I might not be able to achieve the proper biasing conditions. I used BC556B and BC547B transistors. What should I do?
Hi, try to find some clues from the Evil mad scientist kit for the 741. shop.evilmadscientist.com/productsmenu/762. They use 2N3904 and 2N3906 as transistors.
no one recommended fr was searching for it - wow
Excellent explanation !!! ...and I've just learned that unlike most of today's op-amps which use two individual emitter followers feeding a classic differential pair having emitters sharing a common current, 741's input diff uses two CC transistors followed by a common-base amplifier. Thanks for improving my knowledge !
Thank you. I am glad you like it. Yes at the time PNP were poor and opamp needs high beta to lower the base current (input current of op-amp), so Fullagar had to use npn and figure out the right configuration to improve gain and to lower input capacitance
1:09 You made a mistake and it's 23-18 = 5 not 2 so bring down the final 0 = 50 then 50/9=5 so the final answer for 2030/9 = 225 not 222 ignoring remainders
You're right. Incredible mistake...
Does anyone have the link of CircuitVerse for the circuits?
Unfortunately the circuit I used for the video is now useless. I changed some blocks for the series about the adders and the division circuit doesn't work anymore. th-cam.com/video/WmIFFhJYzO0/w-d-xo.html
@ Oh, alright, thank you
The circuit shown between 11:18-12:33 is wrong it has too many XOR gates while the one you show afterwards is correct. Also if we use 2s complement to figure our minus numbers to add when doing binary subtraction why does the simulation software use regular unsigned numbers to help us get the correct answer ?
Yes you're right. The XOR gate in the Cout Is wrong.
my fundamentals for mosfets seems to be lacking, could you please suggest any good resources to learn about the mosfets to know how these different configs of mosfet like 'current mirror' or trans-diode config. i only know the basics (i.e the drain current equation of mosfet, regions of operations). thank you so much
Hi, I suggest you these books: CMOS Circuit Design, Layout, and Simulation, by Baker, Li, Boyce Design of Analog CMOS Integrated Circuits by Behzad Razavi
At 12:14, when mentioning the XOR on the carry out, did you intend to put an AND gate to AND the NOT'd SUB line with the carry out so that on subtraction the bit is dropped (so that it does the following: (NOT SUB) AND Cout7)? With the XOR the way it is on Cout, it is transparent for addition as you've stated, but for subtraction, it effectively performs a NOT instead of blocking it fully. Either way, the carry out should not be modified regardless, because if you want to attach 2 adders together to extend the number of bits, dropping that Cout will disable that ability. If you intend on finding whether the addition resulted in an overflow, you should XOR the carry in and carry out of the last FA which will give you an overflow bit that is accurate for both addition and subtraction in signed notation. Cout is only reliable for unsigned addition overflow, not signed.
You are right the XOR in Cout Is wrong. Cout doesn't need any gate.
Gak jelas, apa nama komponennya!!!????
Phase and frequency detector.
great video! I like that you step through the math instead of "it just works lol"
Thank you
Great video.is there a software you would recommend for simulating these circuits?
For digital circuit I usually use Circuitverse. It is free, online, but basic. For analog circuit I use LTspice. This is a mix of both. I didn't simulate It.
I LIKE IT
Thank you
Can't the AND gate be made with 4 transistors? If you change the places of the high and low voltage sources in the NAMD gate. Or if you connect serial n transistors to the high voltage source and the parallel p transistors to the low voltage source.
No, the n-MOS transitors are on with a logic one and must be below near the zero voltage. The p-MOS transistors must be above near the High voltage because they need a Logic zero to switch-on. You need a voltage difference between source and gate of the transistors and the positions matter in order to create such difference
Nice explanation sir ,but informative channel alway have less views..
Thank you. Please share the videos you like most.
@@Computer-and-Electronics ok
Best OP-Amp video ever! Way better than any book or uni lesson I ever came across. Thank you so much for making me understand all this!
You are welcome. I am glad you like it. Please share this video with people you know may like it.
Most definitely
Thank you
awesome explanation! thanks
You're welcome
Best explanation of the circuit and how to build it. Saved me days of work. Thank you :)
I am glad you like it
Is there any difference into using a multiplexor instead of a decoder?
Yes there is, a mux is a device that selects one of several input signals and transmits it to a single output line. A decoder select Just One of the many outputs through a few control lines. In this case we want a decoder to select the right Memory cell
👍
Nice explanation!Sir👍
Thank you
Super good
Thanks
From minute 6:25 all the equations vu=expression have the term R_C missing and aren't dimensionally correct.
Right, thanks.
Good explanation.
Thank you
you can master truth tables like this: AND gate is just a multiplication of the 2 inputs, NAND is an opposite of AND gate’s output, OR gate is the addition of the inputs (adding 1 +1 equals 1 since its in binary) and NOR is also an opposite of OR gates’s output
who else is in ai and just wants to write efficient codes😂
who else is here because of Andrej Karapathy 👀
awesome explanation, gave me an eureka moment. grazie mille!
Prego. You're welcome.
Couldn't imagine someone explaining how a simple 4-byte RAM works better than this!
Wow, thank you. I am flattered.
is this the end of the Scott's CPU series?
Yes that is the end of videos based on Scott's CPU. Other videos in the playlist are about CPU but not based on Scott's book .
@@Computer-and-Electronics Thanks for making this course, its very Informative and Helpful!
andrej got me here, definitely not disappointed
Thank you
Amazing video
Thank you
Man oh Man!! Watched only one and this is a banger
Thanks
Why does a NOT gate require two transistors exactly? Why not just use a p-type transistor? It works exactly as a NOT gate even without a n-type
Yes you are right, but you should use a resistor instead of the nMos (otherwise the output Is always connected to ground or zero logic). But in Integrated circuit a transistor Is always better than a resistor because It takes less room. Moreover, there are other considerations related to speed, simmetry, power consumption and IC process which make you prefer the two transistors solutions.
@@Computer-and-Electronics ohh got it. Very interesting!!
As many others, I came here from twitter. I would like to ask a question about a NOT gate. I don't understand why you need two transistors if having a single P-Type transistor, supposedly, already achieves the same effect (outputs 1 when input is 0)?
Yes you are right, but you should use a resistor instead of the nMos (otherwise the output Is always connected to ground or zero logic). But in Integrated circuit a transistor Is always better than a resistor because It takes less room. Moreover, there are other considerations related to speed, simmetry, power consumption and IC process which make you prefer the two transistors solutions.
Great video! the man from the internet sent me here
Thank you
Someone recommended this series on twitter and it went viral. Excellent work 👌🏼
Yes Andrej Karpathy recommended... x.com/karpathy/status/1818897688571920514
there should be option to switch voices now for narrative etc .. transcription is already good
Bro gonna do numbers
:-)
andrej made me watch this
Thank you
Great video, thank you
You're welcome, I am glad you like it.