Very Large Scale Integration (VLSI)

Very Large Scale Integration (VLSI) is a technology used to fabricate integrated circuits (IC). The various stages of design, simulation, synthesis, timing analysis, layout and fabrication can be discussed in this category. It is a wide spread technology as most of the existing technologies are digital technologies and need an IC to implement. It is VLSI which made computer to be of the size of a pocket from the size of two rooms.

1,866 Questions
Very Large Scale Integration (VLSI)

What are the advantages of VLSI technology?

Very Large Scale Integration is a method of putting the functionality of many different types of electronic components into a small space or chip. This method essentially :

1. Reduces the size of the device

2. Reduces the cost of the device

3. Reduces the current consumption

4. Increases the speed of operation

5. Offers lots of employments

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Electronics Engineering
Very Large Scale Integration (VLSI)

Truth table for 3 input AND gate?

01011

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Very Large Scale Integration (VLSI)

What are the applications of VLSI?


sum of the applications of VLSI are chip like microcontroller,microprocessor,mobile etc

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Electronics Engineering
Very Large Scale Integration (VLSI)
MATLAB (Matrix Laboratory)

What is full wave rectifire?

Alternative Current has both negative voltage and positive voltage and that are phases that it must go trough to complete one cycle, A bridge rectifier is nothing more then a rectifier that ac tally rectify both +/- phases to give out pulsating Direct Current of either polarity if wanted.

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Electronics Engineering
Very Large Scale Integration (VLSI)

How race condition in flip flop can be eliminated?

it can be eliminated by using not more than two level of gating.

ANSWER: It can be eliminated by using grey code whereby there is only one transition of state before any other can occurs

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Very Large Scale Integration (VLSI)

What happens when sent packet is lost?

packet will be routed in network until its TTL reaches to 0,then it will be discard

jawad ciit wah campus

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Consumer Electronics
Cable Internet
Master of Computer Applications MCA
Very Large Scale Integration (VLSI)

What is the use of logic gates in fm transmitters?

They can be used for error checking. If the transmitter is off frequency, the logic gates can be used to inhibit the transmitter, to stop interference.

Early forms of PLL (Phase Locked Loop) control may also use logic gates to act as dividers. This is normally taken care of by a single dedicated chip, these days.

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Electronics Engineering
Electrical Engineering
Very Large Scale Integration (VLSI)

What are the advantages of TTL over CMOS?

TTL is less sensitive to static-discharge failure and less expensive. It is also faster. There is a condition called "latch up" that can happen with CMOS circuits if an overvoltage is applied during operation, so you have to design the input/output buffers to suit the operating conditions, like if a wire is attached. The first commercial applications of CMOS were by a company called Integrated Device Technology (IDT). Strangely enough, the singular advantage at that time was that CMOS allowed Hewlett Packard to create a practical calculator that was able to retain its memory registers when powered down. (Power was maintained to the chip, but the chip clock was stopped, and the chip could retain its state on very low power.) Before that though, the U.S. Navy used CMOS to reduce the size of circuits jammed in the nose cones of missiles so they could pack them with more explosives instead. TTL (Transistor-Transistor Logic) uses a different type of transistor (bipolar) whereas CMOS uses MOSFETs (metal oxide semiconductor field effect transistor). FETs don't have current flowing into the "gate" when static, whereas bipolars do (into the "base"), so generally this allows them to operate with lower power especially in a stand-by type of state. Before CMOS there was NMOS, which used N transistors and resistors. It's a bit complicated to explain in lay terms without a decent diagram, but CMOS stands for "Complimentary MOS" and uses a P transistor in place of the resistor. The advantage here is no static current flow is required, only at switching. Bipolar or TTL can in fact be faster, although it's not an apples-to-apples comparison because there are different processes for each. Some hybrids have been created like "BiCMOS," where both are combined on one chip. This is probably a lot more than you wanted to know. In short, CMOS is many things, but with the huge amounts of money invested in CMOS today it obviously has all the advantages necessary to be the default technology for most integrated electronics. * Other contributors say: CMOS logic has advantage of having smaller dimensions with new coming (usually smaller) technologies. Thus, the RC constant (RC defines transition time, where R = resistance is coming from R-ON resistance and C = capacitance is coming from gate capacitance) is smaller. Smaller RC constant means shorter transition (0->1 or 1->0)time. Logic is faster and can do more in same time (provided faster system clock). Same functionality is having smaller silicon area and this also means lower price for same functionality. Therefore the CMOS is very popular today and widely used. Concerning the ESD, yes CMOS is more sensitive, because breakdown of MOS gate is always destructive while impact of junction breakdown still depends on ESD pulse energy. Nevertheless, low-voltage CMOS is relatively easy to protect and our company has standard of 4kV ESD HBM (human body model) susceptibility as minimum. I do not remember problems after hand manipulation in the lab.

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Computer Hardware
Electronics Engineering
Very Large Scale Integration (VLSI)

How does CMOS work?

CMOS is the little battery in the computer's motherboard which keeps the computers internal clock running.

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Electronics Engineering
Electrical Engineering
Very Large Scale Integration (VLSI)

What are the advantages of TTL logic family?

To know about the advantages of TTL logic family, one should have a basic idea about RTL, DTL etc. Diode logic (DL) uses diodes to implement logical functions like AND and OR. But the disadvantage is that it can not perform NOT operation. As AND and OR are not complete functions by themselves, they can not perform several logic functions without NOT. Hence, there was a need for some device which can perform a NOT function as diodes can not. That device is a transistor. Then came the DTL which uses a transistor along with diodes. As a transistor can act as an inverter, NAND (NOT-AND) & NOR (NOT-OR) operations can be performed. But this logic uses several diodes which will slow down its operation. Due to the delay offered by them, the logic levels may sometimes change i. e. 0 t0 1 or 1 to 0. Then came TTL. This logic uses a multi emitter transistor, a transistor with many emitter terminals. As every emitter is nothing but a diode, this logic eliminates the use of all diodes. This is the major advantage. As transistor becomes ON and OFF much rapidly than a diode, switching time will be faster. TTL, or Transistor-transistor logic replaced resistor-transistor logic, and used much less power. The TTL family is very fast and reliable, and newer faster, less power-consuming, etc. types are always being developed. = In TTL (Transistor-Transistor Logic), think that the device using this technology is made from several transistors. Another advantage is that many more chips employ this technology.

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Consumer Electronics
Cable Internet
Electronics Engineering
Very Large Scale Integration (VLSI)

What is fanout?

Fan-out is a messaging pattern used to model an information exchange that implies the delivery of a message to one or multiple destinations possibly in parallel and not halting the process that executes the messaging to wait for any response to that message. It is ultimately determined by the maximum source and sink currents of an output and the maximum source and sink currents of the connected inputs.

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164165166
Electronics Engineering
Very Large Scale Integration (VLSI)

What is the difference ttl and cmos?

{| ! CMOS ! TTL | CMOS has good packing density. TTL takes up more space CMOS has better noise immmunity. TTL has a smaller noise immunity range CMOS has a large fan out. TTL can power less inputs CMOS consume less power. TTL use more power CMOS are highly static sensitive. TTL IC's tend to be less susceptible to static electricity CMOS uses FETS (Field-Effect Transistors) TTL uses BJTs (Bipolar junction Transistors CMOS can run with a range of supply voltages. TTL IC's run with a 5V supply. CMOS uses Vdd and Vss for it's power connections TTL uses BJTs (Bipolar junction Transistors CMOS takes a lot less power and is therefore suitable for battery applications, but generally speaking can't run as fast. TTL devices can drive more power into a load. CMOS chips can be damaged by static electricity: even a static jolt that you or I can't feel might destroy a CMOS chip! |}

135136137
Computer Buying
C Programming
Laptops
Very Large Scale Integration (VLSI)

Whats the best laptop which can be used for a home entertainment as well as running high level programes such as VHDL?

Saying you need to run "high level programes such as VHDL" is sort of misleading. VHDL is simply a programming language for designing logic. You need to run the programs that simulate and/or compile the code that you've written.

To compose the code, any text editor will do. In that sense, the slowest machine that will let you edit text will work just fine.

To simulate or synthesize the code, the more complex your design, the more processing and memory power you'll need. For that, you'll need a mid to high end desktop computer or workstation. A good example is a well configured Hewlett Packard XW class workstation.

Of course, the computer that you choose, will depend on the software that you plan to use for simulation and/or synthesis. For windows workstations, I would recommend using Symphony EDA's VHDL Simili. It's available for free from their website.

Anyway, to make a long answer short, look for a computer with specs similar to the following:

* Hardware platform: PC with Intel Pentium II equivalent or better * Video: 1280x1024 resolution or higher (lower resolutions will work but not recommended) * 10/100 Network Card * Operating System: Windows XP and/or Red Hat Linux * Memory: Minimum of 512 MB of available RAM * Disk Space: Minimum 80GB + additional space for vendor libraries.

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Motherboards
Batteries
Very Large Scale Integration (VLSI)

What is the function of CMOS battery?

i can't answer it so please help me

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Computer Hardware
Electronics Engineering
Very Large Scale Integration (VLSI)

Why is cmos important?

In many devices, the technology is enabled in some of the memory to store the date, time, and other important information. This is due to the very low power consumption of CMOS.

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Circuits
Electronics Engineering
Very Large Scale Integration (VLSI)

Why are op-amps named IC 741?

The initials, IC, simply mean that the op-amp is made inside an integrated circuit. Op-amps have a total of 8 pins, and out of those 8 pins, 1 is inactive( pin no. 8) and 7 are active. 4 of the pins (2, 3, 4, and 7) supply the output, and one of the pins (pin 6) observes the output. So 7 means 7 active pins, 4 means 4 inputs, and 1 means 1 output.

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Nikon
Very Large Scale Integration (VLSI)

What is Nikon TTL?

TTL stands for Through The Lens metering. This is system where the camera measures the light on a scene based only on the light coming through the lens. Prior to TTL, there would be a light sensor on the top of the body (or a hand held unit) which measured the light coming from a fixed angle of view. The problem with this method is that it didn't take into account the angle of view of the lens in use. If a wide-angle lens was mounted, only the center of the viewed area would be used in exposure calculations, ignoring areas at the edges which could be brighter or dimmer than the center. When a telephoto (or long focus) lens was mounted, areas around the actually image would be included in the exposure calculation even though they are not included in the eventual image. TTL metering accounts for these differences by measuring light at the film plane. In more modern usage TTL is often used to refer to the flash metering system used by a camera. All of the same information applies. Nikon TTL is the Nikon camera company's version of the processing. The latest Nikon flash system is actually known as iTTL.

103104105
Computer Hardware
Batteries
Very Large Scale Integration (VLSI)

How do you replace cmos battery on acer travelmate 290?

You have to get to the motherboard and pull up the CMOS battery, its a small circle. Then replace it with one with same volts. And make sure you put + and - the right way.

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Electronics Engineering
The Difference Between
Very Large Scale Integration (VLSI)

What is a sweep generator?

A sweep generator is an instrument used to align IF circuits in older FM radios that used adjustable IF coils in the circuits. The generator "sweeps" the frequencies on either side of a set center frequency. When this signal is applied to the front end of an IF circuit, the responce from the IF circuit can be observed at the end of the IF with an oscilloscope allowing the IF coils in the circuit to be adjusted to the desired bandwidth and responce of the circuit.

636465
Electronics Engineering
Technology Conferences
Very Large Scale Integration (VLSI)

What is transitive voltage for voltage input of a cmos operating from 10v?

no answer

515253
Electronics Engineering
Intel 8085
Very Large Scale Integration (VLSI)

What is VHDL?

VHDL is the VHSIC Hardware Description Language. VHSIC is an abbreviation for Very High Speed Integrated Circuit.

It can describe the behaviour and structure of electronic systems, but is particularly suited as a language to describe the structure and behaviour of digital electronic hardware designs, such as ASICs and FPGAs as well as conventional digital circuits. VHDL is an international standard, regulated by the IEEE. Simulation and synthesis are the two main kinds of tools which operate on the VHDL language.

VHDL allows designs to be described using any methodology - top down, bottom up or middle out! VHDL can be used to describe hardware at the gate level or in a more abstract way.

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Computers
Computer Terminology
Very Large Scale Integration (VLSI)

What is the meaning of cmos in terms of computer?

CMOS stands for Complimentary Metal-Oxide Semiconductor. It is the manufacturing technique used to create the main CMOS chip on your computer that stores the initial settings your computer uses to start up. In CMOS setup, you can change the date and time, boot order, boot device, implement security settings, as well as many other things.

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Painting and Watercolors
Typography
Art Media
Very Large Scale Integration (VLSI)

How do you mix gum Arabic solution for lithography from powdered gum Arabic?

Long answer:

Get 400 grams of gum Arabic powder and dissolve it into a liter of water. Put your hydrometer into the gum solution and add more water until it reaches 14 degrees Baume. You then have to add about half an ounce of Listerine as a preservative. Make sure it's the regular old yellow Listerine, not mint or some other brand of mouthwash.

Real answer:

Why bother? Most of us buy it premade.

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Very Large Scale Integration (VLSI)

What is tha full form of VHDL?

VHDL stands for VHSIC Hardware Description Language where VHSIC stands for Very High Speed Integrated Circuit.

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Computer Hardware
Electronics Engineering
Very Large Scale Integration (VLSI)

What is 'CMOS'?

Complementary Metal Oxide Semiconductor.

In computing the term CMOS is often used to mean the non-volatile memory that stores motherboard BIOS information. This was called the CMOS RAM or just the CMOS because it usually used a low-power CMOS memory chip, powered by a small battery. The term remains common as nearly all modern computer components except the "CMOS memory" are constructed in CMOS technology. For the "CMOS", in modern computers, flash memory is usually used.

CMOS, short for Complementary Metal Oxide Semiconductor Is an MOS technology in which both P-channel and N-channel devices are fabricated on the same die CMOS is a widely used type of semiconductor. CMOS semiconductors use both NMOS (negative polarity) and PMOS (positive polarity) circuits. Since only one of the circuit types is on at any given time, CMOS chips require less power than chips using just one type of transistor. This makes them particularly attractive for use in battery-powered devices, such portable computers. Personal computers also contain a small amount of battery-powered CMOS memory to hold the date, time, and system setup parameters.

CMOS topology is very attractive also because circuitry logic synthesis is made automatically. So, you derive logical equation of digital circuit and don't bother about optimization and topology (not too much, maybe you have to edit place&route results).

It is also a good idea to adopt CMOS topology because there will never be an high impedance node (each node will be connected to Vdd or GND), so you gain robustness and noise margin (distance between voltage of logical signals, here Vdd-0=Vdd) is always maximum.

COMS ARE attractive in some application because of the hi rejection signal to noise levels that is because they can operate at higher voltages then TTL however there are drawbacks the hi impedance of these devices if not accounted for can and will cause malfunctions.

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