An LC oscillator is a circuit which we can use to transform a direct current (DC) supply voltage into an alternating current (AC) output waveform. This output can exhibit various types of waveform shapes and frequencies which might range from complex forms to simple pure sine waves depending on the specific application requirements. These oscillators […]
Calculations
Decibel Calculations: From Basics to Advanced Applications
We usually think of decibels as being used to measure loudness. But when designing amplifier and filter circuit layouts, we typically come across numerical values that have extremely wide ranges. For example, a total gain of 665 (19 multiplied by 35) is obtained through cascading two amplifier stages with power gains of 19 and 35 […]
Understanding Active Low Pass Filter Circuit with Calculations
As we learned in our previous tutorial, passive filter circuits depend exclusively on passive components such as resistors (R) and capacitors (C) to provide filtering characteristics. A simple example is a first-order low pass filter built with a series resistor and a shunt capacitor across a sinusoidal input. Active filters on the other hand use […]
Learning Passive Low Pass Filter Circuit Calculations
Basically passive RC filters are circuits that separate various frequencies within a signal. We can consider a signal as a collection of distinct-pitched noises. We can make an RC filter to only allow high-pitched sounds to pass through (such as a treble filter) or only the low-pitched sounds to pass through (similar to a bass […]
Understanding Superposition Theorem, with Calculations
One method for analyzing electrical circuits is the Superposition Theorem. It is applicable to circuits that have several independent sources of voltage or current. The theorem basically enables us to dissect the functioning of the circuit and examine the role played by each source separately. In order to accomplish this, we temporarily disable all other […]
Understanding Electrical Energy and Power, with Calculations
Just think about turning on a light switch and the entire room is filled with light. That is how electrical energy can work its magic. It is that which provides the impetus for many activities in our everyday existence. But what exactly is it? Electrical energy is not only the ability to light up a […]