Coupling (electronics)

Coupling in electronics is like playing with blocks. When you play with blocks, you can stack them on top of each other, but they don't always stay in place. This is kind of like how electronic signals can change when they go through different circuits.

There are different types of coupling, but two of the most common ones are called "DC coupling" and "AC coupling". DC coupling is when you connect two circuits together with a wire, like stacking blocks right on top of each other. When you do this, any changes in one circuit can affect the other circuit directly.

But AC coupling is more like putting a piece of paper in between two blocks. When you do this, the blocks are still close together, but they're not touching directly. This is like how AC coupling adds a capacitor in between the two circuits. The capacitor blocks the steady "DC" voltage, but allows changes in the signal to pass through.

So, in electronics, coupling is all about how different circuits interact with each other, and how changes in one circuit can affect another circuit. There are different ways to connect circuits, like DC and AC coupling, and each one has its pros and cons depending on what you want to do.