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Topic: Analog signal


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In the News (Sat 21 Oct 17)

  
 Analogue electronics - Wikipedia, the free encyclopedia
Any information may be conveyed by an analogue signal, often such a signal is a measured response to changes in physical phenomena, such as sound, light, temperature, position, or pressure, and is achieved using a transducer.
Analog ciruits are several times faster than their digital counterparts.
Analog circuits will never cease to exist, but will continue to exist as an speciality field for high performance circuits, or as a high performance part of a digital chip, as integrated circuits with analog and digital circuits in the same substrate become more popular.
en.wikipedia.org /wiki/Analog_circuit   (1283 words)

  
 Analog Signal Transmission
In transmitting analog signals across a process plant or factory floor, one of the most critical requirements is the protection of data integrity.
Normal mode noise enters the signal path as a differential voltage and cannot be distinguished from the transducer signal.
By increasing the signal, nonlinear effects become dominant, as the signal amplitude is increased-it enhances the signal and the noise in the same proportion.
www.omega.com /literature/transactions/volume2/analogsignal2.html   (949 words)

  
 Analog signal - Wikipedia, the free encyclopedia
An analog or analogue signal is any variable signal continuous in both time and amplitude.
The primary disadvantage of analog signaling is that any system has noise--i.e., random variation.
Clocks with hands are called analog; those that display digits are called digital.
en.wikipedia.org /wiki/Analog_signal   (484 words)

  
 Analog Signal Transmission
To understand the ways in which an analog signal is transmitted over a circuit, it is first important to understand the relationships that make analog signal transmission possible.
V=IR While most single-channel analog signal transmissions use direct current (dc) variations in current or voltage to represent a data value, frequency variations of an alternating current (ac) also can be used to communicate information.
While digital signals are essentially on/off (the pump is on or off, the bottle is there or isn't), analog signals represent continuously variable entities such as temperatures, pressures, or flow rates.
www.omega.com /literature/transactions/volume2/analogsignal.html   (591 words)

  
 The Rebirth of Computer Music by Analog Signal Processing
An analog signal processing architecture is proposed consisting of a memoryless, multidimensional nonlinear function generator, a linear time-invariant system simulator, a non-volatile store, and interface, calibration, and control modules.
With analog systems, conversely the problems and systems cost associated with connecting computing nodes are minor compared to those associated with designing the basic computing elements to meet performance requirements in the areas of component parameter spread, signal/noise ratio, distortion and crosstalk.
Analog circuits offer another way to obtain the cost advantages associated with higher production volumes: products can be built with small (10-20) arrays of identical analog signal processing chips.
www.cnmat.berkeley.edu /~adrian/ICMC1994.html   (4034 words)

  
 The Fine Art of Analog Signal Sampling
These two considerations involve breaking down the analog signal’s magnitude into discrete levels or steps (quantization) and setting the data sampling rate based on the signal’s maximum change frequency component (aliasing and the Nyquist Frequency).
The number of discrete digital values available to represent the continuous analog signal is set by the number of bits contained in the digital converter.
If we sample the signal at too low of a rate, the finer detail of the signal may be missed as it is converted to a digital equivalent.
www.bb-elec.com /tech_articles/analog_signal_sampling.asp   (580 words)

  
 Definition: analog signal   (Site not responding. Last check: 2007-08-17)
A signal that has a continuous nature rather than a pulsed or discrete nature.
A nominally continuous electrical signal that varies in some direct correlation with another signal impressed on a transducer.
(188) Note: For example, an analog signal may vary in frequency, phase, or amplitude in response to changes in physical phenomena, such as sound, light, heat, position, or pressure.
www.its.bldrdoc.gov /fs-1037/dir-002/_0289.htm   (95 words)

  
 PCRecording.com - - your best source for information on the Digital Audio Workstation.
When the analog signal amplitude being sampled falls between a quantization interval (each bit), the system cannot resolve the analog amplitude of the input signal and simply truncates it.
If you were to overlay the digital representation of the analog waveform over the analog shape, you would see that the digital shape roughly approximates the analog shape.
One remedy is to increase the number of bits used to resolve the analog signal.
www.pcrecording.com /dither.htm   (1671 words)

  
 Wiley::Analog Signal Processing
But, as the authors of this groundbreaking guide demonstrate, finding solutions to most analog signal processing problems does not have to be that difficult.
Analog Signal Processing presents an original, five-step, design-oriented approach to solving analog signal processing problems using standard ICs as building blocks.
The five steps of their approach move from signal classification, definition of desired functions, and description of analog domain conversions to error classification and error analysis.
www.wiley.com /cda/product/0,,0471125288,00.html   (305 words)

  
 Analog Devices: Analog Dialogue: Digital Signal Processing 101­ An introductory course in DSP system design: Part 1
Having heard a lot about digital signal processing (DSP) technology, you may have wanted to find out what can be done with DSP, investigate why DSP is preferred to analog circuitry for many types of operations, and discover how to learn enough to design your own DSP system.
In order for an ADC to provide enough samples to accurately describe the real-world signal, the sampling rate must be at least twice the highest-frequency component of the analog signal.
Analog Input: The analog signal is appropriately band-limited by the anti-aliasing filter and applied to the input of the ADC.
www.analog.com /library/analogDialogue/archives/31-1/DSP.html   (2849 words)

  
 Analog Signal Processing / Signal Conditioning System - Daytronic SPS6000
SPS6000 provides programmable signal pathing and hardware assignments via its Configuration Software, so that a single test stand can be used for multiple tests, with minimum changeover time.
User-selected analog function modules for real-time capture and evaluation of specific instantaneous signal characteristics prior to A/D conversion.
It generates two analog outputs: (1) a "Sum Output," which continuously represents the algebraic summation of all active inputs, and (2) a "Minus Sum Output," which is simply the present value of the "Sum Output" with opposite polarity.
www.daytronic.com /products/6K/6kspec.htm   (1205 words)

  
 The Basics - Sensors
An analog sensor, such as a CdS cell (Cadmium Sulfide cells measure light intensity), might be wired into a circuit in a way that it will have an output that ranges from 0 volts to 5 volts.
An important part of using an Analog Signal is being able to convert it to a Discrete Signal such as a 8-bit digital value.
An Analog to Digital converter allows the output of an analog device to be used by a Microcontroller.
www.seattlerobotics.org /encoder/jul97/basics.html   (1981 words)

  
 Tutorial: Analog video signal requirements: Similarities and differences
Analog video has been around for decades and is still in use today.
The Luma signal 720p and 1080i flavors have a bandwidth limited to 30MHz, while the color difference signals are limited to 15MHz.
Since the signal is AC-coupled and the DC-bias point varies with the average signal level, it is best to utilize the AC-Bias mode with signals that have sync information with 5V supply to ensure no clipping will exist.
www.eetasia.com /ARTICLES/2006MAY/C/2006MAY_TRL.HTM   (6403 words)

  
 What is analog? - a definition from Whatis.com
- 1) In telecommunications, an analog signal is one in which a base carrier's alternating current frequency is modified in some way, such as by amplifying the strength of the signal or varying the frequency, in order to add information to the signal.
An analog signal can be represented as a series of sine waves.
The term originated because the modulation of the carrier wave is analogous to the fluctuations of the human voice or other sound that is being transmitted.
searchsmb.techtarget.com /sDefinition/0,,sid44_gci211561,00.html   (182 words)

  
 Analog Signal Generator suits troubleshooting applications., Dwyer Instruments, Inc
Unit includes LED bar graph that indicates analog signal level, and auto shut-off timer ranging from 2—20 min with 2 min increments and 6 min default setting.
Dwyer Instruments, Inc., the preferred source for practical and affordable on/off valve solutions, is proud to announce the release of the Model ASG Analog Signal Generator.
The unit generates a 0 to 10 VDC signal in increments of 1 volt or a 4 to 20 mA signal in increments of 2 mA.
news.thomasnet.com /fullstory/462189/rss/772   (754 words)

  
 Analog Devices: Analog Signal Processing Design - Signal Chains, APP_NOTES, Technical Articles
Analog signal processors have long been used to provide simple signal manipulation that could be very complicated to handle any other way.
Analog filters provide anti-aliasing in sampled data systems as inputs to ADCs and outputs from DACs, and are used as pre-filters in audio and communications systems.
Analog multipliers and dividers are used to provide simple gain control, ratiometric functions, or continuous power measurement, with accuracy on the order of 1%.
www.analog.com /en/genFunc/0,3175,977,00.html   (988 words)

  
 Howstuffworks "Can you explain the basic difference between analog and digital technology?" (via CobWeb/3.1 ...   (Site not responding. Last check: 2007-08-17)
In analog technology, a wave is recorded or used in its original form.
So, for example, in an analog tape recorder, a signal is taken straight from the microphone and laid onto tape.
The wave from the microphone is an analog wave, and therefore the wave on the tape is analog as well.
www.howstuffworks.com.cob-web.org:8888 /question7.htm   (226 words)

  
 Analog signal processor
The various filter and gain functions, which are necessary to derive the tweeter, midrange, and woofer drive signals, are implemented with operational amplifiers, capacitors and resistors forming an analog signal processor with one input and three outputs.
The location of each function block in the signal path is critical for obtaining the desired amplitude and phase response and to control signal levels at each stage for minimum distortion and noise.
The function of the ASP could be duplicated with a digital signal processor, DSP, by realizing the poles and zeros of the different transfer functions, and following the same signal flow and gain distribution.
www.linkwitzlab.com /orion_asp.htm   (303 words)

  
 Definition: quasi-analog signal   (Site not responding. Last check: 2007-08-17)
quasi-analog signal: A digital signal that has been converted to a form suitable for transmission over a specified analog channel.
Note: The specification of the analog channel should include frequency range, bandwidth, signal-to-noise ratio, and envelope delay distortion.
When quasi-analog form of signaling is used to convey message traffic over dial-up telephone systems, it is often referred to as voice-data.
www.atis.org /tg2k/_quasi-analog_signal.html   (106 words)

  
 Analog Devices : Embedded Processing & DSP Home
Analog Devices : Embedded Processing & DSP Home
ADSP-21xx Processors, are code- and pin-compatible families of Digital Signal Processors with performance up to 160MHz and power as low as 184 micro-amps.
Analog Devices and its partners have a broad range of offerings from device drivers to complete reference designs.
www.analog.com /processors   (178 words)

  
 Analog Signal Conditioning/Filtering Systems
You can rely on a single source for analog signal conditioning and switching—a complete range of instrumentation—products optimized to work together to provide high performance at reasonable cost.
The new Precision 28000 Signal Conditioning System provides up to 256 channels of fully programmable transducer conditioning.
All 28000 conditioners may be equipped with 4, 6 or 8-pole programmable anti-aliasing filters with over ten filter characteristics to choose from.
www.pfinc.com /products/conditioning_systems/signal_cond.htm   (230 words)

  
 Analog signal reception
The analog signal for the regular cable stations is really bad.
I also have the Sammy 4663 and the analog reception was awful.
It is not HD quality but it is as good as any analog that I have ever had.
forum.ecoustics.com /bbs/messages/2/130451.html   (481 words)

  
 Amazon.com: Analog MOS Integrated Circuits for Signal Processing: Books: Roubik Gregorian,Gabor C. Temes   (Site not responding. Last check: 2007-08-17)
Describes the operating principles of analog MOS integrated circuits and how to design and use such circuits.
The initial section explores general properties of analog MOS integrated circuits and the math and physics background required.
Analog MOS Integrated Circuits for Signal Processing is a must have for anyone doing IC MOS design or analysis.
www.amazon.com /Analog-Integrated-Circuits-Signal-Processing/dp/0471097977   (1100 words)

  
 Howstuffworks "How Analog and Digital Recording Works"
When CDs were first introduced in the early 1980s, their single purpose in life was to hold music in a digital format.
In order to understand how a CD works, you need to first understand how digital recording and playback works and the difference between analog and digital technologies.
In this article, we will examine analog and digital recording so that you have a complete understanding of the difference between the two techniques.
electronics.howstuffworks.com /analog-digital.htm   (98 words)

  
 Digital TV: A Cringley Crash Course -- Digital Vs. Analog
A digital image isn't inherently better than an analog image, and in some cases it can be worse.
An HDTV picture doesn't have to be digital either; Japanese HDTV is broadcast over an analog signal.
A digital signal doesn't produce the same problems with the picture we see on a distant analog television, either.
www.pbs.org /opb/crashcourse/digital_v_analog   (208 words)

  
 Topic - Analog/Mixed-Signal
Complex signals must be digitized upon reception and converted to analog form for transmission.
In the process of creating various products that deal with analog signals, one frequently requested function is automatic gain control.
This feature is needed to control the amplitude of a given input signal so that it always remains within some...
www.wsdmag.com /Topics/TopicID/729/729.html   (952 words)

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