From the course: Electronics Foundations: Basic Circuits

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Impedance matching and bridging

Impedance matching and bridging

From the course: Electronics Foundations: Basic Circuits

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Impedance matching and bridging

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- [Tutor] When I string together multiple circuit elements, such as a microphone, going through a filter an amplifier, and then finally a speaker. Some of those elements, like the microphone, function as a source, which reduces a signal as output. Other circuit elements like the speaker, will act as a load, which takes a signal as input. And some of those circuit elements like the amplifier and filter, will act as both a source and a load, taking a signal as an input, doing something to it, and then providing the modified signal as output. When I connect these components, I need to pay attention to how each of the sections interfaced with each other, in terms of their input and output impedance. For components that act as a signal source, I'll need to pay attention to their output impedance, which is also called the source impedance. All electronic devices that produce signals will have some amount of internal impedance at…

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