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analog to digital converter analog-to-digital converter,the input signal is processed with an electronic low-pass filter to remove all frequencies above the Nyquist frequency (one-half the sampling rate). This is done to prevent aliasing during sampling, and is correspondingly called an antialias filter. On the other end, the digitized signal is passed through a digital-to-analog converter and another low-pass filter set to the Nyquist frequency. This output filter is called a reconstruction filter, and may include the previously described frequency boost. Unfortunately, there is a serious problem with this simple model: the limitations of electronic filters can be as bad as the problems they are trying to prevent.If your main interest is in software, you are probably thinking that you don't need to read this section. Wrong! Even if you have vowed never to touch an oscilloscope, an understanding of the properties of analog filters is important for successful DSP. First, the characteristics of every digitized signal you encounter will depend on what type of antialias filter was used when it was acquired. If you don't understand the nature of the antialias... How to measure phase angle using an oscilloscope? How to measure phase angle using an oscilloscope? some thing about analog combuter? Analog computer
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A page from the Bombardier's Information File (BIF) that describes the components and controls of the Norden bombsight. The Norden bombsight was a highly sophisticated optical/mechanical analog computer used by the United States Army Air Force during World War II, the Korean War, and the Vietnam War to aid the pilot of a bomber aircraft in dropping bombs accurately.An analog computer is a form of computer that uses electrical or mechanical phenomena to model the problem being solved, or more generally by using one kind of physical quantity to represent another. Modeling a real physical system in a computer is called simulation.
Contents[hide]
1 History
2 Background
3 Mechanisms
4 Components
5 Limitations
6 Current research
7 Practical examples
8 Real computers
9 See also
9.1 Other computers
10 Reference
11 External links
[edit] History
The Antikythera mechanism is the earliest known mechanical analog computer. It was designed to calculate astronomical positions. It was discovered in 1901 in the Antikythera wreck off the Greek island of Antikythera, between Kythera and... Do you know what an oscilloscope does? Do you know what an oscilloscope does?An oscilloscope is easily the most useful instrument available for testing circuits because it allows you to see the signals at different points in the circuit. The best way of investigating an electronic system is to monitor signals at the input and output of each system block, checking that each block is operating as expected and is correctly linked to the next. With a little practice, you will be able to find and correct faults quickly and accurately. 1 2 3 Next You might also consider these Oscilloscope options: oscilloscope basics how analog oscilloscope channel oscilloscope digitizing oscilloscope oscilloscope probe oscilloscope non working infiniium oscilloscope oscilloscope clip probes oscilloscope scope probe oscilloscope digital digital oscilloscope dual beam oscilloscope philips oscilloscope analog scope oscilloscope oscilloscope madell mhz analog oscilloscope mhz oscilloscope oscilloscope vintage oscilloscope nice gwo oscilloscope type analyzer oscilloscope oscilloscope accessor oscilloscope pico adc oscilloscope user manual hung chang oscilloscope oscilloscope storage ch digital oscilloscope lecroy oscilloscope probe mixed signal oscilloscope oscilloscope amplifier oscilloscope calibrator oscilloscope extras real time oscilloscope dual oscilloscope scope portable oscilloscope automotive oscilloscope benchtop oscilloscope cathode ray oscilloscope ch oscilloscope chan oscilloscope explorer iii oscilloscope oscillograph oscilloscope oscilloscope bk oscilloscope calibrated oscilloscope pods precision oscilloscope
