Why tri-state buffer is used to form a bus system?
Tri-state Buffer Control. The Tri-state Buffer is used in many electronic and microprocessor circuits as they allow multiple logic devices to be connected to the same wire or bus without damage or loss of data.
What are tristate devices and why are they essential in a bus oriented system?
A device which has 1 input ,1 enable output line is called tristate device,if two different devices wants a common bus then tri-state device are essential to assign bus to any one of them in bus orientation system. In multiplexed bus system many devices are connected to a common bus.
When it is important to use a three state buffer?
The primary purpose of a three-state buffer is usually: A. 28….Exercise :: Shift Registers – General Questions.
| A. | when two or more outputs are connected to the same input |
|---|---|
| B. | when all outputs are normally HIGH |
| C. | when all outputs are normally LOW |
| D. | when two or more outputs are connected to two or more inputs |
What is meant by tristate buffer?
Definition: A three state bus buffer is an integrated circuit that connects multiple data sources to a single bus. The open drivers can be selected to be either a logical high, a logical low, or high impedance which allows other buffers to drive the bus.
Why is NAND better than and?
NAND VS AND for two reasons : 1)NAND gates use fewer transistors than AND gates and circuit implementation using NAND gates will result in a smaller area in the IC.
Is NAND or NOR faster?
Although in NAND gate pmos are in parallel and in NOR they are in series, so NAND gate is faster than NOR.
Where are NAND gates used?
NAND gates can also be used to produce any other type of logic gate function, and in practice the NAND gate forms the basis of most practical logic circuits. By connecting them together in various combinations the three basic gate types of AND, OR and NOT function can be formed using only NAND gates, for example.
Why is NAND easier than And?
Graham Cox, Has a degree in Electronics Design and Technology. NAND gates do two things, AND gates only one. A NAND gate is an AND gate followed by a NOT gate. That ‘extra’ inversion (actually it comes for free in most circuit implementations) makes it far more versatile than a plain AND.
Why is NAND logic preferred over NOR?
NAND uses transistors of similar sizes. Which reduces manufacturing cost of NAND gate. When considering gates with more inputs, NOR gates requires transistors of 2 different sizes whose size difference is more when comparing with NAND gates. If either input is low, a single Pmos resistance drives the output high.
Why are the NAND and NOR gates more popular?
NAND and NOR gates are more popular as these are less expensive and easier to design. Also other functions NOT AND OR can easily be implemented using NAND/NOR gates. Thus NAND NOR gates are also referred to as Universal Gates.