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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.

703 Questions

What is the CMOS in computers?

CMOS stands for complementary metal-oxide-semiconductor. It is a kind of technology used in some microchips.

As applied to personal computers, CMOS typically refers to the component used to store BIOS (basic input-output system) code because those chips used to be made exclusively with CMOS technology. A CMOS error is the same as a BIOS error.

What is the recent trend in vlsi technology?

the recent trend in vlsi technology is the 22nm technology before three months its 60nm tech. that is the device fabrication in the IC is carriedout in 22nm's.

What are disadvantages of VHDL?

VHDL is basically a hardware description language. To describe hardware as a program that can be dumped into a PLD, we use VHDL. It is essential to represent hardware as program so that it can be tested before realizing it physically. If there are any errors, they can be corrected here itself.

What is the VHDL code to implement NOR gate?

Below code can implement NOT gate in VHDL. The code is written in data flow model.

Library ieee;

use ieee.std_logic_1164.all;

Entity gates is

port (a : in std_logic; c : out std_logic);

end gates ;

architecture and1 of gates is

begin

c<=not a;

end and1;

What is the vhdl program for 4-to-2 encoder?

LIBRARY ieee;

USE ieee.std_logic_1164.all;

USE ieee.std_logic_arith.all;

ENTITY pri_enc IS

port(a,b,c,d:in std_logic;m:out std_logic_vector(1 downto 0));

END ENTITY pri_enc;

architecture pr_en of pri_enc is

begin

process(a,b,c)

begin

if a='1' then

s<="00";

elsif b='1' then

s<="01";

elsif c='1' then

s<="10";

else s<="11";

end if;

end process;

end pr_en;

When was the CMOS made for the computer?

If you mean the CMOS setup, then it was likely made around 1984. That was the year that IBM released the AT computer. That was the first to make use of CMOS settings. If you mean CMOS-based logic chips, they have been around since at least the the mid 1970's.

How old is heidy ttl?

I'm sorry, but I don't have any information on an individual named Heidy TTL. If you could provide more context or details about who she is, I might be able to help you better!

What are the available CMOS sub families?

CMOS (Complementary Metal-Oxide-Semiconductor) technology encompasses several subfamilies, primarily categorized into standard, low-power, and high-speed CMOS. Standard CMOS is widely used for general applications, while low-power CMOS is designed for energy-efficient devices, making it suitable for battery-operated applications. High-speed CMOS, on the other hand, is optimized for fast switching and high-frequency performance, often used in high-speed digital circuits. Additionally, there are specialized variants like RF-CMOS for radio frequency applications and mixed-signal CMOS for combining analog and digital functions.

Why is VLSI design flow called a cycle?

Design of any complex mechanism (electronic, software, mechanical, etc.) requires a cyclic process of design, prototyping, test, identifying problems, and repeat until the mechanism comes reasonably close to meeting its requirements.

What device decreases the TTL value whenever a packet traverses it?

The device that decreases the Time to Live (TTL) value whenever a packet traverses it is a router. Each time a packet passes through a router, the TTL value is decremented by one to prevent packets from circulating indefinitely in the network. If the TTL value reaches zero, the packet is discarded, which helps maintain network efficiency and prevents congestion.

What is vhdl program for counter in behavioral model?

library IEEE;

use ieee.std_logic_1164.all;

use ieee.std_logic_unsigned.all;

entity counter is

port(Clock, CLR : in std_logic;

Q : out std_logic_vector(3 downto 0));

end counter;

architecture archi of counter is

signal tmp: std_logic_vector(3 downto 0);

begin

process (Clock, CLR)

begin

if (CLR='1') then

tmp <= "0000";

elsif (Clock'event and Clock='1') then

tmp <= tmp + 1;

end if;

end process;

Q <= tmp;

end archi;

What is MTCMOS?

MTCMOS stands for multi threshold CMOS. CMOS stands for complementary Metal Oxide Semiconductor.

Why 1164 used in encoder vhdl programming?

VHDL program follows IEEE library. This means that all the data types, commands, keywords etc. used in a VHDL program are stored in a library called IEEE library. This library will be available in the EDA tool which is executing the VHDL program. 1164 is a package where all the logic gates are defined. This is a sub part of IEEE library. As encoder program requires logic gates, we need to use 1164 package in the code.

What is the meaning of test setup?

There may be faults in a design. Verification is required to any design before utilizing it for any application. The verification is done with a test vector or a test pattern. Applying these vectors is called test setup.

Why ttl voltage level converting to rs232 level?

Whwn an IC is connected to a PC, then the voltage levels of these two should be synchronized. For this purpose, the TTL voltage level is converted to RS 232 level. RS 232 is the interface between a PC and an IC.

How does an CMOS image sensor work?

The CMOS sensor in a camera is a light sensor that takes in the light of an image and turns it into electrons, the electrons are then turned into pixels so that they can be viewed. CMOS stands for Complimentary Metal-Oxide Semiconductor.

What are the advantages and disadvantage of CMOS inverter?

CMOS inverters offer several advantages, including low power consumption, high noise immunity, and a wide range of operating voltages, making them suitable for battery-powered devices. They also have a high packing density, allowing for compact circuit designs. However, disadvantages include slower switching speeds compared to bipolar transistor inverters and susceptibility to latch-up in certain conditions. Additionally, they can be more complex to manufacture due to the need for both n-type and p-type transistors.

What is a test bench?

A gargantuan penis that multiple humans (not always female) 'test out' in the result of an emergancy

How do you simulate NGC in Xilinx?

Open ISE window select Simulation below u can see a tab showing behavioural in that select post translate and simulate.

How old are ttl models?

TTL (Transformer-Text-to-Text Language) models, like T5, were introduced by Google Research in 2019. The underlying architecture of transformers, which these models utilize, was initially introduced in the seminal paper "Attention is All You Need" in 2017. Therefore, TTL models are around 4 years old as of 2023, while the foundational transformer architecture is about 6 years old.

What would be the function of logic gates?

To keep people out that are not supposed to be inside of the logics. If people get inside of the Logic gates, they could cause havoc to the people inside of these gates.

When is that the 'NAND' logic gate can function as a 'NOT' logic gate?

When the two input terminals of a NAND gate are short circuited, it acts as a NOT gate.