What is Analog: Definition and 284 Discussions

ANALOG Computing (an acronym for Atari Newsletter And Lots Of Games) was an American computer magazine devoted to Atari 8-bit family of home computers. It was published from 1981 until 1989. In addition to reviews and tutorials, ANALOG printed multiple programs in each issue for users to type in. The magazine had a reputation for listings of machine language games–much smoother than those written in Atari BASIC—and which were uncommon in competing magazines. Such games were accompanied by the assembly language source code. ANALOG also sold commercial games, two books of type-in software, and access to a custom bulletin-board system.
Originally the title as printed on the cover was A.N.A.L.O.G. 400/800 Magazine, but by the eighth issue it changed to A.N.A.L.O.G. Computing. Though the dots remained in the logo, it was simply referred to as ANALOG or ANALOG Computing inside the magazine.
While the program listings were covered under the magazine's copyright protections, users were granted the right to type them into their computer for personal use, so long as they were not sold or copied.

View More On Wikipedia.org
Recent contents Top users
  1. dexterdev

    AD633 analog multiplier IC and AM generation.

    Hi PF, I used the circuit shown in datasheet of AD633 to generate AM waves. But the output I got was not correct. I want to why this error comes and explanations will be helpful. I will have to go for BF194 designs else. Here in our labs transistor circuits seldom works. Why I don't...
  2. A

    The Intricate World of Analog Signals and the Limitations of Digital Processing

    is it true that analog signals are the logarithmic version of the natural signals... and hence the name a-na -log.? what is the meaning of infinite information contained in analog or continuous valued signal? please elaborate
  3. Rob D

    Matter: Digital or Analog? Exploring the Perceptions and Models of the Universe

    I am vexed. In your expert opinion can matter and the particles and wave forms of which it is composed be described within a digital model or an analog. Is this a human perception limitation wherein the analytical left hemisphere types prefer a digital universe mostly because it can be...
  4. M

    Help designing analog filter designs for an audio activated 8x8x8 LED cube

    I am working on designing a music visualization system using LEDs. I would like to create an analog design that uses op amps to filter, amplify, and add DC bias to an audio signal so it can be read into the A/D of a 5V microprocessor. The input signal is a +/- 1.5V volt audio signal coming from...
  5. Z

    Condition +-.1v from 2 wires to 0-5 for Arduino analog

    I am toying around with connecting a 236PC 15GW pressure sensor to my arduino board. I am supplying nearly 10 volts to the Sensor and can get +- .1V readings from some simple tests. How do I condition these two lines that give +- .1V to range from 0-5 Volts for the Arduino analog pins.
  6. B

    Temperature analog of free energy

    The Gibbs energy is used to determine the spontaneity of a thermodynamic process under isobaric conditions. The Helmholtz energy is used to determine the spontaneity of a thermodynamic process under isovolumetric conditions. I was curious: is there an energy used to determine the spontaneity...
  7. R

    What is typical internal resistance of analog voltage meter?

    What is typical internal resistance of a voltage meter on a handheld analog multimeter, and also what is typical resistance on its ammeter?
  8. U

    Digital to Analog conversion

    Hello Everyone, In Digital to Analog conversion circuit we use the weighted resistors(i.e R,2R,3R,4R) and one feedback resistor(i.e Rf). Here my question is that how to calculate the those resistor values? If you know any formulas please provide me...
  9. W

    Looking for Analog to PWM signal -

    Hello All: This may be a repeat post - I looked at my history and did not see it. I am looking for a product ( finished/qualified) that takes a standard Analog signal ( 0-10V and/or 4-20mA) and converts to a PWM signal with fixed but settable; Frequency of ~ 100 to 5000hZ - possibly with a...
  10. Nabeshin

    Astrobites analog for physics?

    Astrobites provides an interesting, and in my opinion, important service of helping undergraduate astronomy students become better acquainted with current research literature. Beyond helping these students, it's also nice for the graduate students who produce the articles. Does anyone know...
  11. S

    Any useful analog to finite differences for matrix products?

    Various closed form formulas for summing the first n terms of a sequence \{a_i\} of numbers can be developed by considering the various order differences of the terms, such as {\triangle} a_i = a_{i+1} - a_i and \triangle^2 a_i = \triangle ( \triangle a_i) . Closed form formulas occur if...
  12. E

    Are there any EE textbooks comparable to the renowned Feynman Lectures?

    Hello, I'm wondering if there are a series of books, analogous to the Feynman Lectures, for Electrical Engineering. The Feynman Lectures (as many of you know) are clear and concise, and nutshell a great deal of typical undergraduate study. A student can read these lectures from cover to...
  13. T

    Scaled" & "Inverted" in Picoammeter Analog Voltage Output

    Meaning of "Scaled" and "Inverted" in context of picoammeter analog voltage output I'm trying connect a picoammeter to an oscilloscope, and I noticed that its analog voltage output was described as "scaled" and "inverted". I'm just curious as to what that means about the oscilloscope is going...
  14. R

    Comparing 8 analog signals and outputting the largest one

    I drew a circuit using paint for this function. I was wondering what kind of individual comparator should I use to save the most power. Also, what are some less noob ways of going about this? sorry if stupid question. I am an undergrad
  15. S

    [Paper choice] Numerical Mathematics or Analog Electronics and Circuit Analysis.

    I am a physics major and have to make a choice between either of these two papers. The numerical mathematics is at the equivalent to US senior level and the electronics paper is equivalent to US junior level. I'm quite interested in biophysics and/or medical physics for grad school but I'm not...
  16. H

    What Are Some Recommended Analog Design Books?

    Hello, I was googling for analog design electronic book, which describe the issues in application manner, so i found this book https://www.amazon.com/dp/B0072EJ8H8/?tag=pfamazon01-20 Please share your opinion concerning this book and others if you have. Regards, Hisham
  17. R

    Difference between analog and digital interface

    I am working with two distance sensors 2d120(analog output), 2y0a21(digital output). In those two datasheets, they had written that 2d120(analog) requires analog interface and 2y0a21(digital) requires digital interface. Currently, i am using only 2y0a21(digital output) sensor in my project work...
  18. A

    Is there going to be more or less demand for analog designers in the future?

    On the one hand, there the argument that things are going digital, and most IC design firms now try to have as few analog components as they can. On the other hand, as long as you're interfacing with the real world, you can never really design a completely digital system. Also, I hear that...
  19. Newtons Apple

    Digital Signals on Analog lines?

    Hello everyone I have a question that I've been pondering.. And it probably has a simple answer. I'm studying physics of Telecommunications at college, and we were talking about how you can't send digital square pulses over phone lines. This would require an unlimited need for bandwidth, and...
  20. A

    Tensor analog of Poincare Lemma

    Hi everyone, I know that there is a result that corresponding to a closed p-form α, I can find a p-1 form β, such that dβ = α. I wanted to ask, what the tensorial analog of this would be. I mean would it be right to say that on a manifold with a lorentzian metric, If I have a vector...
  21. A

    How can I integrate analog components for a small keyboard device?

    Hello everybody, I'm trying to do some kind of keyboard device which has like 12-15 digital inputs and outputs to a serial USB port. Because other similar circuits I've seen I know I need a microcontroller and some capacitors. The problem is, my device has to be very small and I can't put...
  22. B

    Question about coaxial digital to analog converters

    Is there a coaxial digital to analog converter that only decodes the digital signal into multiple signals for the channels and then converts the digital signals into analog signals but does not serve as a digital tuner? Because most coaxial digital to analog converters do not decode the...
  23. O

    Which is best way to go among digital, analog, microwave/RF or DSP

    Hi all, I have been thinking about doing Master's degree in Electrical Engineering but I'm really not sure which way to go. In fact I'm more into digital and DSP but I though it would be great idea to hear from experts in the field regarding the future job market and salaries especially in...
  24. B

    Analog vs. Digital Circuits: Which is Right for Me?

    I need to decide whether to take analog circuits of digital circuits. I can always take the other one later. But for now, it's a tough call. I am very into computing and its applications, and I love logic; it seems like digital is the way to go for that stuff. However, I am also very...
  25. D

    Matrix analog of del operator?

    The del operator is often informally written as (d/dx, d/dy, d/dz) or \hat{x}\frac{d}{dx}+\hat{y}\frac{d}{dy}+\hat{z}\frac{d}{dz}, a pseudo-vector consisting of differentiation operators. Could there be a pseudo-matrix operator like it? What would one be differentiating with respect to- that is...
  26. T

    Level of johnson-Nyquist noise in analog voltmeter

    Hello, I was wondering if anybody could answer a quick question: What is the typical level of Johnson-Nyquist noise in an analog voltmeter in equilibrium (short circuited)? Is it millivolts? What is the level for an AC current of order mA at 50Hz?
  27. F

    Is the brain analog, digital, both or

    is it way to simplistic to think of it in this context?
  28. P

    Frequency Response of an analog system?

    An input of 2.δ(t) is applied to a system and produces the response y(t)=6.e^-2t - 4.e^-3t Find an expression for the systems frequency response. The method used would be great too. I know there's some Fourier transforms involved.
  29. N

    How to recognize patterns in an analog waveform?

    Hi All As the title of this thread suggest, I am looking for ways to recognize patterns in an analog waveform. Well the obvious answer to this question is use Artifical Neural Network (ANN) as ( from the text on google) its been used for pattern recognition and all sorts of stuff. I've been...
  30. N

    GR Analog to F=ma: Exploring the Geodesic Equation

    I am interested to know what Newton's second law (F=ma) looks like in general relativity. Looking at the geodesic equation, it appears to have some similarity. Multiply the mass of a particle by both sides and it looks like this...
  31. P

    Find 4th Edition of B P Lathi's Digital, Analog Communication Systems

    hi everybody..i do need the 4TH EDITION of b p lathi"digital,analog communication systems"..can anyone help me?
  32. F

    Digital vs Analog - Noise Distortion

    In my textbook it says this: "Digital communication, which can withstand channel noise and distortion much better than analog as long as the noise and the distortion are within limits, is more rugged than analog communication. With analog messages, on the other hand, any distortion or noise, no...
  33. B

    How much of analog circuits before digital circuits?

    Hi pf, first time poster, long time lurker. The question that I have is: how much of analog electronic circuits must you know about before digital electronic circuits (I'm talking about the introductory level for both of these subjects). At my school, they offer a 2-part course in analog...
  34. M

    Physical explanation of bandwidth (analog)

    Hello friends, I am finding it a bit difficult to comprehend what the author of a famous textbook has written about TV signal band width. Here is the excerpt from his book. Could any of you please explain what exactly he means? I don’t get why the required bandwidth is around 5.5 MHz...
  35. H

    (Nonlinear Dynamics)Find a Mechanical Analog dx/dt=sin(x).

    Homework Statement What is a mechanical analog for xDOT=sin(x) .?Explain how using this analog, it becomes obvious that x*=0 is an unstable fixed point and that x*=pi is a stable fixed point. Homework Equations dx/dt=sin(x) The analytical solution to this problem is...
  36. M

    Can I Build a Homebrew Analog Computer Using Op Amps?

    Hi All, This is a great forum for both newbies and advanced techies alike. I am a senior level tech and I have rediscovered analog computers. I would like to build a homebrew analog computer with op amps, obviously. I have done extensive research and found that detailed schematics are in rather...
  37. A

    What is the difference between an analog signal and alternating current?

    what is the difference between an analog signal and alternating current??
  38. A

    Sketching the Periodic Extension of x(t) for y(t) with Ramp and Step Functions

    I sketched the signal for y(t) and my answer is shown pic1.jpg but apparently it's wrong and the right answer from the tutorial answers is shown in pic2.jpg. So could someone tell me what I have done wrong. Thanks Homework Statement Consider the signal x(t) = r(t) u(2-t) where r(t) is the...
  39. P

    Disadvantages of Non-Inverting Summing Op Amp

    Hi, I was wondering what the disadvantage of using a non-inverting summer was rather than using an inverting summer. I was told that inverting summers are better, but not why they are. I ask because I'm making a circuit that performs a center of mass calculation: (V1 + V2) - (V3 + V4) =...
  40. M

    Analog Computer Lab: Building a Feedback System

    Hello everyone, I hesitated to post in this section because I couldn't determine if it was more appropriate to post it in the electrical engineering section or in the homework one. Since this is a relatively simple project and counts as homework, I posted it here. However if I am posting in...
  41. S

    How does analog video acquisition work?

    Would someone who has been around longer than me know of any books or resources to explain how analog video works. Most stuff I have found seems to be more software based or are geared towards photography rather than laboratory work. I have been looking in the literature for my work and some...
  42. L

    Analog sensor data over the ethernet

    Hi, I need to get data from some sensors over a ethernet connection. I found that application idea on microchip site: http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=2505&param=en535727#P26_1312 How do I build that circuit?
  43. C

    Calculating the cutoff frequency on analog filter

    for Butterworth filter -> Ha(s).Ha(-s) where s=jΩ I got (Ω^4)/1+Ω^6 hence this not Butterworth filter, and I managed to find all the poles, where all the poles lie on the left hand side so this filter is stable.. My problem is, I'm not quite sure how to calculate the cutoff frequency, for...
  44. T

    Difference between analog and digital frequencies

    Homework Statement in the 1st lecture of DSP in the college the prof. tells us that in sinusoidal signals such as sin (wt) the (w) is the analog freq. in time domain but if it was a discrete signal (not continuous) such as sin (wTn).. wT will be the digital freq. I'm really confused and...
  45. D

    Analog Front End or ADC with FPGA

    Let me preface this by saying I am very new to FPGA's. I am trying to find a way to sample 3 channels simultaneously at a resolution of 16 bits per channel and at a rate of at least 600KSPS per channel and then 2 channels at a resolution of 16 bits at a rate of at least 200KSPS. I've decided...
  46. S

    Analog and Digital; Continuous and Discrete

    Is it possible to have the following signal: 1) Discrete and analog 2) Discrete and digital (I believe this one is true and very common in man made product) 3) Continuous and analog (I believe this one is also true and very common in nature) 4) Continuous and digital If a picture...
  47. C

    Using a 555 timer as an analog frequency divider?

    Hey guys, I'm trying to build a circuit where I can put in an analog signal (my voice) and have it output the same signal with a much lower pitch (speech synthesizer). Is there any way I could do this with primarily a 555 timer? I'm able to pulse width modulate the analog signal, but I...
  48. K

    Analog Electronics: Emitter Follower Working Principle

    What is an emitter follower? I want to know its working principle with proper circuit diagram..
  49. D

    Analog to digital conversion for a project

    Hey guys, I am trying to do analog to digital conversion for a project. I don't want to use the digital chip, but want to do it in analog. I need 8-bit resolution. I found one approach: string resistor ladder. It uses 2^n-1 resistors. For 8-bit conversion I will have to use 255 resistors...
  50. B

    Analog signal output from computer

    Hello all, I'm an electrical engineering tech student working on a little side project and I can't find anything to help me with a crucial part. I have a gauge cluster out of an automobile that I want to interface with a computer to used while playing a racing game. I have a computer...
Back
Top