# Questions tagged [analog-computer]

An analog computer does not use discrete representation of values, but rather continuous values for its inputs and outputs. This tag includes questions about circuits used to implement analog multiplication, analog division etc.

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### How to transform resistance between two linear ranges?

This question is motivated by an automotive problem from this question. In a quad vehicle, in a 12V system, there's a fuel sender with 0-100 ohm range, empty to full. The fuel sender was a part of a ...
1 vote
85 views

### Is there any electrical system simple enough to make yourself which has some kind of useful property like radio communication or basic computation? [closed]

I would like to make some kind of primitive system in the direction of a computer, from scratch. Someone showed me you can use ferromagnets to do some elementary computation; the “states” are the ...
65 views

### Inverting a (voltage-) transfer function using opamp

If we have a circuit that - given some input voltage $U$ - produces an output voltage $f(U)$ (where $f$ is continuous, monotonic descending), we can construct a new circuit that behaves like the ...
773 views

### Is it possible to make a ring modulator where we replace the transformers with op-amps?

I've tried making a ring modulator like the one in following picture but without using transformers (as the right ones are quite a bit harder to get and more expensive compared to op amps). I assume ...
195 views

### Are there well known simple operationnal amplifier circuits designs to make purely analog squaring amplifier (for experimental analog computing)?

In order to make analog calculation (for analog regulator simulation), what would be the means to make an squaring amplifier ? There is an obvious solution with a multiplier circuit as pointed here; ...
170 views

### Analog computing vs Numerical simulation [closed]

Does the electronic circuit equivalent of a mathematical model have any inherent advantage over numerical simulation of the same model ? For instance, if I numerically simulate the Navier-Stokes ...
414 views

### Analog Computer Wiring

I'm trying to implement the following schematic of a simple analog computer The inputs are x and y, according to the text where I found this diagram the circles represent voltage dividers or ...
286 views

### Adding large numbers in context of analog computing?

I have been reading about analog computing yet have not been able to find material about a certain issue; in reference to arithmetic, it is said that op-amps are used to perform these tasks, for ...
217 views

### How can I model a double pendulum in op-amps? [closed]

I'm interested in chaotic circuits; and while many circuits that model attractors like Chua's Circuit, Lorenz Attractor, and RC phase shift networks are available, I would really like to model the ...
867 views

### How is this circuit providing solution of the differential equation d^2 v/dt^2 = -9v?

Book pages at https://books.google.co.in/books?id=d-7owi6uNtMC What I see is that they have taken d^2 v/dt^2 as an input at point A, integrated it to get dv/dt, integrated it again to get v=2sin3t V,...
195 views

### Compute spatial integral using analog computing

Let me start by saying that I am not an electrical engineer but a mathematician, who just started to dive into the world of analog computing using for the moment Simulink to simulate an analog ...
88 views

### Analog Equivalent Circuit of an easing function

I am trying to wrap my head around wether and with which circuit it would be possible to emulate the behaviour of a digital easing function like ...
1 vote
979 views

### Is there any way to do matrix/vector algebra with analog electrical components?

Is there any way to do matrix/vector algebra with analog electrical components? Only addition, subtracting and multiplying. I'm going to build a Linear-Quadratic-Gaussian(LQG) Controller.
1 vote
165 views

### Analog computer [closed]

I have read a few articles, about possibility developing analog computers.Can anyone explain me what difference they will have this computers with modern digital computers compared.Because I don't ...
485 views

### Do analog circuits exist that are essentially mathematical functions in DC?

I am curious if a class of analog circuits exist that would take say a 0-5 V input signal and output a mathematical function like a sine function mapping 0-5 V to 0-2pi, or a log, exponent, polynomial?...
1 vote
524 views

### Multisim, Simulation Error

As the picture describes, the Vout is the division's result, but we have an error. Because my experience with MultiSim is not at a high level, why does this happen? Is this my fault ? ]1