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.
Fred, Barney and Ralph belong to the La Trobe Mountain Club. Every member of the Club is either a skier or a hiker. Anyone that doesn't like snow does not like skiing. No hikers li
Interconnection Network Introduction This unit discusses the types and properties of interconnection networks. In multiprocessor systems, there are multiple I/O modules
Data Routing Functions The data routing functions are the functions which when implemented the path among the source and the objective. In dynamic interconnection networks the
State about Dynamic modelling and its inputs Dynamic modelling is elaborated further by adding concept of time: new attributes are computed, as a function of the attribute chan
Define Modem. A modem changes digital signals into audio tones to be transmitted over telephone lines and also changes audio tones from the lines in digitals signals for machin
Intranets are mainly "small" Internets. They use same network facilities that Internet does, though access is restricted to a limited sphere. For example, a company can set up an i
The idea of clustering is defined as use of multiple computers naturally multiple storage devices, PCs or UNIX workstations and their interconnections to make what emerges to users
Post interrupts - computer architecture: Post interrupts Exact interrupts examine interrupt bit on entering WB Longer latency Handle immediately
What are the primary impacts of information systems on an organization (employer, club, school, religious, etc..) for which you are familiar? What are the primary ways in which
The ?rst task in the project is to develop a sane system to store change logs and versions of ?les. The simplest approach is to create a "dot" directory in the location of the ?le
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