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The worst case time between:

  1. application of valid new stable values on the adder's inputs
  2. the development of the valid new stable carry on the adder's carry output
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How can Propagation delay be avoided in a parallel adder?

The parallel adder which we use in the digital circuits ,the carry output of each full adder stage is connected to the carry input of the next higher order stage.therefore,the sum and carry outputs of any stage cannot be produced until the input carry occurs; This leads to a time delay in the addition process.This delay is known as carry propagation delay. to the second question the propagation delay can be avoided in the binary parallel adder with the help of look ahead carry generator .............................................................................................................................


What is the difference between Serial and Parallel Adder?

Some key differences between a Serial and Parallel Adder are that a Serial Adder is slower, a Parallel adder is a combinational circuit and the time required for addition depends on the number of bits in a Serial, but not a Parallel. A Serial Adder is a sequential circuit while a Parallel is a combinational circuit.


How does a half adder work?

A full adder has three inputs - A, B, and CarryIn from the prior stage. It generates a Result and a Carryout with the truth table... ABC-RC 000-00 001-10 010-10 011-01 100-10 101-01 110-01 111-11 The adder can be a ripple adder, in which the propogation delay depends on the carry "rippling" through the logic, or it can be a look-ahead-carry type, which has constant propagation delay time, at the expense of more logic.


What are the disadvantages of ripple carry adder?

time delay


Advantages of fast adder over parallel binary adder?

serial adder: 1) Slower 2) It uses shift registers 3) IT requires one full adder circuit. 4) It is sequential circuit. 5) Time required for addition depends on number of bits. Parallel adder: 1) Faster 2) It uses registers with parallel load capacity 3) No. of full adder circuit is equal to no. of bits in binary adder. 4)It is a combinational circuit 5)Time required does not depend on the number of bits


How does the look ahead adder improve the efficiency of arithmetic operations in digital circuits?

The look ahead adder improves efficiency by reducing the time needed to perform addition in digital circuits. It does this by generating carry signals in advance, allowing for faster computation of sums without waiting for carry signals to propagate through the circuit.


Difference between adder and parallel adder?

1.serial adder add bits serially but parallel adder add bits at the same time . 2.serial adder depends on previous outputs but parallel adder does not depends on previous outputs . 3.parallel adder takes less time to execute compared to serial adder.


What is propagation Time?

A: A transistor when is switched on there are delay caused by junction capacitance turning it off these same capacitance must be discharges causing delays in total response it is constant situation however as frequency increases it becomes troublesome


What best defines propagation delay?

Propagation delay is the time it takes for electronic devices to switch from one logic state to another.


What is the function of an adder in a color television?

To compile to amount of time you spend watching the vile beast.


When propagation speed is mulitplied by proagation time you get the?

distance traveled by the wave.


What is a K555 time circuit?

A 555 time circuit is a circuit chip that can be used for a variety of applications. some include: clocks, time delays, countdown timers, and other time-circuits.