In this video, electrical engineer Barron Stone converts gain values expressed as a ratio into logarithmic units of decibels (dB). Learn how to convert quantities of power and voltage into decibels. Explore common decibel values and corresponding ratios a
- [Instructor] To describe certain characteristics…of electronic circuits, we often use…the ratio of two values, such as the voltage gain…of a filter which is the ratio of the…filter's output amplitude over the…input signal amplitude.…When working with electronics, it's common…to encounter ratios for characteristics like gain…that are really really large, going up into the millions,…or that are really, really small.…To make working with these large or small ratios easier,…engineers frequently use a unit…called decibels, or dB for short.…
The decibel is a logarithmic unit that's used…to express the ratio of two values.…You'll usually see decibels used in electronics…when describing or comparing quantities…of power or amplitude, such as the…gain of filters and amplifier circuits.…We can convert quantities of electrical power…into decibels using the equation…10 times log base 10 of the ratio between two power values.…In this ratio, the power value on top…is typically a measured value from the circuit…and the power value on bottom is acting…
- Reading electrical schematics
- Building circuits on breadboards
- Reviewing types of static and variable resistors
- Reading resistor color codes
- Measuring resistance with a DMM
- Measuring resistive sensors with an Arduino microcontroller
- Making electrical signal measurements with an oscilloscope
- Measuring AC voltage with a DMM
- Understanding the time domain and frequency domain
- Designing passive low-pass and high-pass filters
- Reviewing reactive RC and RL circuits
- The relationship between capacitors and inductors
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1. Building Circuits
Read electrical schematics6m 25s
3. Resistive Circuits
4. Oscilloscope Measurements
6. Alternating Current
7. Electrical Signals
8. Reactive Circuits
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