Latest Software-Defined Radio Education

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Principles of Radio

Textbook

One of the more fascinating applications of electricity is in the…

Other Diode Technologies

Textbook

Varicap or varactor diodes A variable capacitance diode is known as a…

Signal Modulation

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A modern method of electrical power control involves inserting a…

Maximum Power Transfer Theorem

Textbook

The Maximum Power Transfer Theorem is not so much a means of analysis…

Mixed-Frequency Signals

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What is a harmonic frequency? If an oscillator circuit outputs a…

Design Project: Radio Transmitter

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Research the FCC (Federal Communication Commission) guidelines on…

BJT Quirks

Textbook

An ideal transistor would show 0% distortion in amplifying a signal.…

Phase-Locked Loops

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This is a schematic for a simple VCO: The oscillator is of the RC…

Passive Filter Circuits

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In very simple, qualitative terms, rate the impedance of capacitors…

Special Transformers and Applications

Textbook

Impedance Matching Because transformers can step voltage and current…

Fundamentals of Radio Communication

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What does the acronym RF stand form, in reference to radio-related…

What Is the Skin Effect?

Textbook

The Skin Depth of Copper in Electrical Engineering As previously…

Radio Circuits

Textbook

(a) Crystal radio. (b) Modulated RF at antenna. (c) Rectified RF at…

AC Waveforms

Textbook

When an alternator produces AC voltage, the voltage switches polarity…

Introduction to Digital Communication

Textbook

In the design of large and complex digital systems, it is often…

Electrical Noise and Interference

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Define what noise means, in the electrical sense of the word. How does…

AC Instrumentation Transducers

Textbook

Just as devices have been made to measure certain physical quantities…

Three-phase Transformer Circuits

Textbook

Since three-phase is used so often for power distribution systems, it…

Analog and Digital Signals

Textbook

Instrumentation is a field of study and work centering on measurement…

Microstrip Patch Antenna Calculator

Tools

This tool calculates the dimensions of the microstrip patch antenna given the desired operating frequency.

Simple Parallel (Tank Circuit) Resonance

Textbook

Resonance in a Tank Circuit A condition of resonance will be…

Snell’s Law Calculator

Tools

Given three of the four input parameters (refractive indices, angles of incidence, and refraction) this tool calculates the missing variable based on Snell's law.

Electromagnetic Induction

Textbook

While Oersted’s surprising discovery of electromagnetism paved…

Band-pass Filters

Textbook

How to Create Band-pass Filter There are applications where a…

Power Added Efficiency Calculator

Tools

A calculator designed to compute the power-added efficiency (PAE) of an amplifier

Maximum Power Transfer Theorem

Textbook

The Maximum Power Transfer Theorem is not so much a means of analysis…

Microstrip Inductance Calculator

Tools

This calculator computes the inductance of a microstrip etched on a PCB.

Magnetic Units of Measurement

Textbook

If the burden of two systems of measurement for common quantities…

Mutual Inductance

Worksheets - Software-Defined Radio

When an electric current is passed through a coil of wire, what…

Finite State Machines

Textbook

Up to now, every circuit that was presented was a combinatorial…

Q Factor and Bandwidth of a Resonant Circuit

Textbook

The Q, or quality, factor of a resonant circuit is a measure of the…

Rectifier Circuits

Textbook

What is Rectification? Now we come to the most popular application of…

Noise Figure Calculator

Tools

A tool designed to calculate the noise figure of cascaded amplifiers

Solid-state Relays

Textbook

Limitations of Electromechanical Relays As versatile as…

Rectifier Circuits

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Don’t just sit there! Build something!! Learning to mathematically…

Series Circuits and the Application of Ohm’s Law

Textbook

In this introduction to series resistance circuits, we will explain…

Karnaugh Maps, Truth Tables, and Boolean Expressions

Textbook

Who Developed the Karnaugh Map? Maurice Karnaugh, a…

Table (portrait view)

Textbook

  Periodic table of chemical elements.

Calculus for Electric Circuits

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∫f(x) dx Calculus alert! Calculus is a branch of mathematics that…

IGBTs

Textbook

Because of their insulated gates, IGFETs of all types have extremely…

DeMorgan’s Theorems

Textbook

A mathematician named DeMorgan developed a pair of important rules…

Resistors

Textbook

Because the relationship between voltage, current, and resistance in…

Digital Display Circuits

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What is the purpose of a seven-segment decoder circuit? What is a…

Design Project: Radio Transmitter

Worksheets - Software-Defined Radio

Research the FCC (Federal Communication Commission) guidelines on…

Conversion From Decimal Numeration

Textbook

Because octal and hexadecimal numeration systems have bases that are…

Pi Attenuator Calculator

Tools

This calculator helps you determine the values of the resistors R1 and R2 to be used for a Pi Attenuator.

N-Way Power Divider Calculator

Tools

This calculator determines the total path loss provided by an RF n-way power splitter.

Strain Gauges

Textbook

If a strip of conductive metal is stretched, it will become skinnier…

Conductors and Insulators

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Given two lengths of metal wire, which one will have the least…

Bit Grouping

Textbook

The singular reason for learning and using the binary numeration…

Amplifiers

Textbook

Practical Benefit of Active Devices The practical benefit of active…

Voltage/Current Converter OpAmp Circuits

Worksheets - Software-Defined Radio

Don’t just sit there! Build something!! Learning to mathematically…

History of SPICE

Textbook

SPICE is a computer program designed to simulate analog electronic…