Help designing a circuit

[nachobalasch]

Hello,

I'm trying to design a circuit for a class project that does the following:

//Textual explanation
Two Inputs: a and b. One Output: c
a is a continuous signal that I'm trying to measure (in c) but only if b has been turned on as well. If a stops, then you again need b in order to get c.

//Graphic explanation
I've attached a file.

If you know any way that I can design a circuit to work like this passively, I would love to hear it. Thank you very much for taking the time to read this.

 

[AnalogKid]

1. What do you mean by "variable signal"?

2. Which signals are digital and which signals are analog?

3. the leftmost image has an unlabeled input.

4. Is the output signal analog, digital, exactly equal to the "variable signal", or something else?

ak

 

[nachobalasch]

1. What do you mean by "variable signal"?

2. Which signals are digital and which signals are analog?

3. the leftmost image has an unlabeled input.

4. Is the output signal analog, digital, exactly equal to the "variable signal", or something else?

ak

Hello, thank you for your reply! I’ll try to clarify my question as best as I can.
1. Variable signal: a voltage produced by a thermoelectric generator -> probably a ~continuous current.
2. The second input would be a digital input. The output would be analogue. It needs to work without a power source.
3. The second input is a digital input that, alongside the initial input, makes the machine produce an output or in other words, let’s the input pass through.
4. It doesn’t really matter what the output is as long as it is measurable.

 

[AnalogKid]

It sounds like what you want is an analog switch or transmission gate. These are electronic components that require a power source to operate.

Another option is low-power relay.

ak

 

[Harald Kapp]

a circuit for a class project

Moved to the homework section.

 

[Harald Kapp]

Look up relays.

 

[nachobalasch]

Ty all for your replies!