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What is the function of zero order hold?
Zero order hold is used in Digital - Analogue converters (DACs). It literally holds the digital signal for the sample time, then moves to the next digital sample and holds that signal for the sample time as well, in order to reconstruct the analogue signal.
Why you use digital signal processing instead of analouge signal processing?
There some or more reason as follows 1 There only tow voltage (current) levels high or low in digital system but there are infinite level of voltage(current) in analogue system. 2 Digital systems are extremely immune to noise as compare to analogue system. 3 Digital systems are very compact as compare to analogue system These are according to my knowledge or further there may be more reasons!!
Which device is used to convert analog signals to digital signals?
In datacommunications this is a modulator/demodulator, commonly known as a modem. In electronics a digital to analog converter (DAC) chip is used to convert digital signals to analog and an analog to digital converter (ADC) chip to convert analog signals to digital. Some chips are available which include both ADC and DAC functionality. There are thousands of different types of DAC and ADC sytems and which one to use largely depends on how fast you want to do the conversion.
Analog signal vs digital signal?
A: Analogue is a signal DC with varying amplitudes. Digital is a state defined as true or false or machine language '1' '0' Digital must change states to supply information while analogue it has only to change amplitude
Why it is generly true that a digital signal required high bandwidth than analog signal?
A: Analogue signal Direct voltage that varies in the low spectrum of frequency on digital signal the information is deciphered in micro seconds therefore the frequency must be hi the higher the better.
How do you convert digital signal to analogue signal?
There are several devices called digital to analog converters for this purpose. 1s and 0s of the digital signal are used to represent the digital signal in analog form.
Which device converts a digital signal to text?
A: If the signal is analogue then an ADC analogue to converter is required. The output will be in a digital form and that can be decoded and displayed as readout using LEDS or any other visual media
What is the function of zero order hold?
Zero order hold is used in Digital - Analogue converters (DACs). It literally holds the digital signal for the sample time, then moves to the next digital sample and holds that signal for the sample time as well, in order to reconstruct the analogue signal.
Is there any difference between an analog signal and a wave signal?
A Digital Signal can have one of two values, 1 or 0. An Analogue signal can have any value between 1 and 0. Digital signals are better for sending information as if the signal is somewhat distorted, it is still easily recognisable. Vinyl Record use analogue. Cds use Digital
What is a modems purpose?
1. To MODULATE (convert) the digital signals from a computer into analogue signal to enable it to be carried through the telephone line. 2. To DEMODULATE (convert back) analogue signals from a telephone line into digital signal to be used in computer.
How do you connect a SPDIF audio output to a left and right analog audio impute?
SPDIF is a digital audio protocol developed by Sony and Philips. In order to connect the signal to an anologue input, a digital to analogue converter is required. If the source also has analogue outputs, it is much easier to use them - the digital to analogue converter is built into the source and saves the need for an external one. It might be argued that a good quality external converter can produce a better quality analogue signal than an integrated converter in a DVD player for example. A listening test will help to decide if that is the case.
What do you mean by digitizer?
The word 'digitizer' means device for converting analogue signals into digital signal
Where does the name modem come from?
It is a device that changes the digital signal from a computer into the analogue signal more suited to a phone line, and the analogue signal from phone line into the digital signal for the computer to use. These two processes are called modulation and demodulation. The word modem comes from these two words: MOdulation and DEModulaion = MO DEM.
How telkom uses fiber optics to transmit sound than the copper cables?
Hi The sound is converted from analogue signal into a digital format and then transmitted with other digitized voice signals across the fibre. Next the digital signal are separated and converted back to analogue signal. regards Philip
What are defrances between analog and digital?
The differences between analogue and digital is in the transmission of signals. Analogue technology will transmit a signal wave in its original format but in digital technology, the analogue wave is sampled and turned into numbers which are stored in digital devices.
Why has tv reception been changed to digital?
In digital there is a signal threshold below which dropout (pixelation) occurs. When an analogue signal degrades the picture just gets 'snowy'. However, digital reception which is running alongside analogue is at quite a low level to prevent interference with the analogue channels and appears more susceptible to weather interference. When the analogue signals are turned off the digital signal is boosted to give maximum coverage and will deliver a better service all round.
When viewing a digitally transmitted programme on a coventional cathode ray tube television is the picture digital or analog?
Eventually, all digital television signals become analogue. In the case of an LCD television, each crystal shutter operates in an analogue fashion to control the brightness of the pixel. In a CRT television, the conversion happens further back in the signal path. Most CRT televisions don't have digital inputs so it is normal for the signal to be converted back to analogue before it reaches the television, using composite video or analogue component signals for example. If the television has a digital input, the signal will be changed to analogue before being processed and amplified ready to arrive at the tube.
