Tag: computer in accounting

An example of digital rather than analog communication is DDS.

DDS:-

Direct digital synthesis (DDS) is a powerful technique used in the generation of radio frequency signals for use in a variety of applications from radio receivers to signals generators and many more. The technique has become far more widespread in recent years with the advances being made in integrated circuit technology that allow much faster speeds to be handled which in turn enable higher frequency DDS chips to be made.

Digital communication:-

Digital communication is a mode of communication. It occurs when the information or the thought is encoded digitally as discreet signals and then is electronically transferred to the recipients. Digital means of communication like messaging apps are surging in popularity all over the world.

Analog communication:-

Analog communication is a data transmitting technique in a format that utilizes continuous signals to transmit data including voice, image, video, electrons etc. An analog signal is a variable signal continuous in both time and amplitude which is generally carried by use of modulation.

6 bits are required to encode all 26 letters, 10 symbols and numerals.

If we want to represent one character from the 26-letter Roman alphabet (A-Z), then we need log2(26) = 4.7 bits. We will need 5 bits.

Resolution of 10 bit ADC is 1ms.

The only way to increase resolution without reducing the range is to use an ADC with more bits. A 10-bit ADC has 2^{^10}, or 1,024 possible output codes. There is no switching of IP channels and there is at least 1ms between enabling the ADC and starting the conversion.

The ADC reports a ratio metric value. This means that the ADC assumes 5V is 1023 and anything less than 5V will be a ratio between 5V and 1023. Analog to digital conversions are dependent on the system voltage.

An analog to digital converter (ADC) is an electronic device which converts varying analog signals into digital signals so that they can easily be read by the digital devices.

Keeping library in digital form is called digital library.

A digital library is an online database of digital objects that can include text, still images, audio, video, or other digital media formats. The digital content may be stored locally, or accessed remotely via computer networks.

A digital library is a collection of documents in organized electronic form, available on the Internet or on CD-ROM (compact-disk read-only memory) disks. Depending on the specific library, a user may be able to access magazine articles, books, papers, images, sound files, and videos.

IEEE S02.3 uses straight binary encoding with 0 volts for 0 bit and 5 volts for 1 bit.

It leads to ambiguities, for avoiding ambiguities. We used Manchester encoding and differential Manchester encoding.

Manchester encoding:-

Manchester encoding is a synchronous clock encoding technique used by the physical layer to encode the clock and data of a synchronous bit stream. In this technique, the actual binary data to be transmitted over the cable are not sent as a sequence of logic 1's and 0's.

Differential Manchester encoding:-

Differential Manchester encoding scheme is a line code in which data and clock signals are combined to form a single 2-level self-synchronizing data stream. It is a differential encoding, using the presence or absence of transitions to indicate logical value.

Baseband system:-

A baseband bandwidth is equal to the highest frequency of a signal or system, or an upper bound on such frequencies.

Quantum Computer is the smallest and fastest computer imitating brain working.

Quantum computing is computing using quantum-mechanical phenomena, such as superposition and entanglement. A quantum computer is a device that performs quantum computing. Such a computer is different from binary digital electronic computers based on transistors. Whereas common digital computing requires that the data be encoded into binary digits (bits), each of which is always in one of two definite states (0 or 1), quantum computation uses quantum bits or qubits, which can be in superpositions of states. A quantum Turing machine is a theoretical model of such a computer, and is also known as the universal quantum computer. The field of quantum computing was initiated by the work of Paul Benioff and Yuri Manin in 1980, Richard Feynman in 1982, and David Deutsch in 1985.

When UPC is used, the price of the item is located on the shelf and in computer storage.

Universal product code (UPC), a unique 12-digit number assigned to retail merchandise that identifies both the product and the vendor that sells the product. The UPC on a product typically appears adjacent to its bar code, the machine-readable representation of the UPC.

A barcode is an optical, machine-readable, representation of data; the data usually describes something about the object that carries the barcode.