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Hi,
this may sound funny , but why cant we use Op-amp as adder, subtracter , integrator...etc instead of Big complex circuits..performing these calculations.
we can use ADC and DAC to input and output digital data
Hi,
this may sound funny , but why cant we use Op-amp as adder, subtracter , integrator...etc instead of Big complex circuits..performing these calculations.
we can use ADC and DAC to input and output digital data
Hi,
this may sound funny , but why cant we use Op-amp as adder, subtracter , integrator...etc instead of Big complex circuits..performing these calculations.
Yep Nigel is it not funny how ideas flow old idea some one brings it back up and thinks its a new idea.
Operational amplifiers are important building blocks for a wide range of electronic circuits. They had their origins in analog computers where they were used in many linear, non-linear and frequency-dependent circuits. Their popularity in circuit design largely stems from the fact that characteristics of the final op-amp circuits with negative feedback (such as their gain) are set by external components with little dependence on temperature changes and manufacturing variations in the op-amp itself.
Dang Ian your old They made calculators I really like this one it test parts I think. So it's a Analog computer part tester and it said calculator I want one what ever it is LOL View attachment 60253
But some websites say they are fast in performing calculation for differential equations. while digitally decoding Input and output of theirs offers precision
But some websites say they are fast in performing calculation for differential equations. while digitally decoding Input and output of theirs offers precision
How can it be precise when the circuit isn't that precise? - 1% accuracy would be good for all the components in the circuit - which is crappy accuracy in computing terms.
The idea of analogue computers was that you built a model to simulate your problem, it was a question of circuit design and wiring, not programming at all - a totally hardware solution.
Yes i was also thinking Op-Amps are inherently imprecise ..doesnt matter how precise input is.
This site has small paragraph For Hybrid computers.
It says they are best for Real time simulation and at high frequency no single digital computer is capable of the task
**broken link removed**
In cargo vessels, the "Lodicator" was an analogic computer used to calculate, essentially the trim, bending and stability based on the weight distribution (fuel, diesel, water and cargo) in the designated spaces. The term was the brand that became a generic name for those computers.
The input was done using mostly two knobs (coarse & fine) for each quantity . For a vessel with seven cargo holds, and around 30 tanks you can estimate how many knobs you had in front of you on the panel.
Once, I had the chance to open it and could see the circuit and the power supply (a big one). And the number of chips all over.
They used lot of power (you could feel it) making the place a warm one.
Once finely adjusted it was always the concern of the Chief Officer that nobody will touch anything there. The premise was; do not touch it and keep it on during cargo operations.
First thing Ch. Officers did after signing on was to see how accurate it was and how close the results were to real life.
They fitted quite well the calculation since the trim is figured out based on the concept of moments which are always referred to the main section (or the aft perpendicular). That goes along well with having a bridge in balance.
Nowadays a PC is in charge. Classification societies require that PC to be used only for cargo calculation exclusively.
The actual use of my two first computers, Timex 1000 and the Timex 2068 was to implement those calculations.
That information is quite dated. It refers to super computers as being capable of executing hundreds of millions of instructions per second. Modern desktop processors are running in the tens of billions of instructions per second.
In the defense world, I rarely run into analog or true hybrid computers anymore. If I do, it tends to be on a very old system that hasn't been upgraded yet like an autopilot on an older ship or synchro based differential measurement systems. Digital systems have all but replaced these systems.
I have built and still have an analog computer that I built from an article from either Pop Elect or Radio Electronics in the mid 70's.
It had controls to vary parameters on a bouncing ball. It needs to be connected to a scope in X-Y mode.
You can vary things like Initial velocity, the elasticity of the ball, the medium etc. Quite cool to see a ball bounce and deform across the screen.
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