Computer or Computer
Is an electronic device capable of receiving a set of instructions performing load and run on the numerical data or by compiling and correlating other information.
The world of high technology would never have existed if not for the development of computer or computer. Every society uses these machines in different types and sizes, for storing and manipulating data. The computer equipment has opened a new era in manufacturing through the techniques of automation, and have improved the modern systems of communication. Are essential tools in almost all fields of applied research and technology.
There are currently two types of computers: analog and digital. However, the term computer or computer is often used to refer exclusively to digital.
Facilities that contain elements of analog and digital computers are called hybrid computers. In a digital computer can also enter data into analog form using an analog to digital converter, and vice versa (digital to analog converter).
Micropocesadores and buses
Is called to any microprocessor CPU in a single pill, even though some of them have the architecture and the power of small mainframe computer.
It was decided to try the CPU on a single chip for a good reason: its relationship with the rest of the system is well defined. A microprocessor chip typically have between 40 and 132 feet, through which establishes its relationship with the outside world. A few feet send signals from the CPU, others accept signals from outside and some perform both functions. If we understand the function of each of the legs, we learn as the CPU interacts with memory devices and I / S-level digital logic.
The legs of a microprocessor chip can be divided into three types: address, data and control. These legs are connected to similar pad memory and input / output through a set of parallel wires called bus.
The bus serves as a communication link shared between subsystems. The two main advantages of the bus body are the low cost and versatility. By defining a simple interconnection scheme, you can easily add new devices and peripherals can even be shared between computer systems using a common bus. The cost is low since a single set of cables is a multiple shared path. One reason, of which the design of the bus is so difficult is that the maximum bus speed is limited by physical factors: the length of the bus and the number of devices (and therefore the bus load).
MOS memories
Two major advantages of MOS devices as compared to bipolar devices, are enabling greater densities of bits in the integrated circuit chips, and primarily are easier to manufacture. However, the MOS transistors are high impedance devices, which leads to a lower power dissipation. Its main disadvantage is its relatively slow speed of operation.
As in the case of bipolar memories are many possible configurations of MOS cell. The simplest is the flip-flop circuit. The operation of the circuit is similar to its bipolar counterpart. Transistors performs the same function as the resistors of the previous point. Transistors corresponding to the two diodes. Act as switches that can be opened or closed under control of the line of words. When these two switches are closed, the contents of the cell is transferred to the bit lines. As in the case of bipolar memory when you select a particular cell, its contents can be rewritten by applying appropriate voltages on the bit lines.
Both the bipolar cell, as his MOS, require a continuous flow of current energy supply, through one of the two branches of the flip-flop. Are capable of storing information indefinitely, provided they are
maintain this flow. Therefore they are known as static memory. See also static RAMor SRAM.
The high impedance can be achieved in MOS technology can build a different type of memory known as dynamic memory (DRAM). The dynamic memory is based on simple cells, which allows higher density of bits and lower consumption of energy in relation to static configurations. See also dynamic RAM or DRAM.

Product Details Product Details

Filed under: General
Trackback Uri

Comments are closed.