Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. What is Dynamic Random Access Memory?
RAM technology is divided into 2 technologies: Static and dynamic. A dynamic RAM (DRAM) is made with cells which store data as charge on capacitors. Absence or presence of charge on capacitor is interpreted as binary 1 or 0. Since capacitors have a natural tendency to discharge, dynamic RAM needs periodic charge refreshing to maintain data storage. Term dynamic corresponds to this tendency of stored charge to leak away even with power continuously applied.
Figure below is a typical DRAM structure for an individual cell which stores one bit. The address line is activated when bit value from this cell is to be read or written. Transistor acts as a switch which is closed (allowing current to flow) if a voltage is applied to address line and open (no current flows) if no voltage is present on address line.
For write operation a voltage signal is applied to bit line; a high voltage represents 1 and a low voltage represents 0. A signal is then applied to address line allowing a charge to be transferred to capacitor.
For read operation when address line is selected transistor turns on and charge stored on capacitor is fed out onto a bit line and to the sense amplifier. Sense amplifier compares capacitor voltage to a reference value and decides if cell contains logic 1 or logic 0. The read out from cell discharges the capacitor that should be restored to complete operation.
Even though the DRAM cell is used to store a single bit (0 or 1) it is necessary an analog device. Capacitor can store any charge value within a range. A threshold value determines whether charge is interpreted as 1 or 0.
Explain Macro definition and call. Macro: The assembly language programming frequently finds this necessary to repeat certain piece of code several times during the course of
How to Calculate the Logic Circuit Outputs? Once the Boolean expression for a circuit output has been acquired, the output logic level can be determined for any set of input le
Multi-Threaded Processors In unit 2, we have gone through the use of distributed shared memory in parallel computer architecture. Although the use of distributed shared memory
A combinational circuit has 3 inputs A, B, C and output F. F is true for following input combinations A is False, B is True A is False, C is True A, B, C are
Explain about the Object Identity of object oriented analysis Object identity is a feature of an object that differentiates the objects from all other objects in the applicati
Pipelining - computer architecture: The Pipeline Defined According to John Hayes "A pipeline processor consists of a sequence of processing circuits, called stages or
A dialog box, generally square, that records an on or off value.
State about AGP The latest addition to many computer systems is the inclusion of accelerated graphics port (AGP). AGP operates at the bus clock frequency of the microprocessor.
It happens when two or more processes are reading or writing some joint data and the final result depends on who runs exactly when.
what is computer
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd