Latest Software-Defined Radio Education

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BJT Quirks

Textbook

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

Maximum Power Transfer Theorem

Textbook

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

Phase-Locked Loops

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

Principles of Radio

Textbook

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

Design Project: Radio Transmitter

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Research the FCC (Federal Communication Commission) guidelines on…

Signal Modulation

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A modern method of electrical power control involves inserting a…

Other Diode Technologies

Textbook

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

Mixed-Frequency Signals

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

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…

Passive Filter Circuits

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

Radio Circuits

Textbook

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

What Is the Skin Effect?

Textbook

The Skin Depth of Copper in Electrical Engineering As previously…

Skin Depth Calculator

Tools

A tool designed to calculate skin depth based on the conductive material being used and the frequency of the signal.

Special Transformers and Applications

Textbook

Impedance Matching Because transformers can step voltage and current…

Other Diode Technologies

Textbook

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

Simple Parallel (Tank Circuit) Resonance

Textbook

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

Q Factor and Bandwidth of a Resonant Circuit

Textbook

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

Susceptance and Admittance

Textbook

What is Conductance? In the study of DC circuits, the student of…

Active Filters

Worksheets - Software-Defined Radio

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

Mixed-Frequency Signals

Worksheets - Software-Defined Radio

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

Review of R, X, and Z (Resistance, Reactance and Impedance)

Textbook

Before we begin to explore the effects of resistors, inductors, and…

Square Wave Signals

Textbook

It has been found that any repeating, non-sinusoidal waveform can be…

Basic Electromagnetism and Electromagnetic Induction

Worksheets - Software-Defined Radio

When lightning strikes, nearby magnetic compass needles may be seen to…

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.

Power Added Efficiency Calculator

Tools

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

LC Tank Circuit Resonance Calculator

Tools

This calculator computes the resonant frequency of a parallel inductor and capacitor "tank" circuit.

Three-phase Transformer Circuits

Textbook

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

Bridged-Tee Attenuator Calculator

Tools

This calculator helps you determine the values of the resistors R1 and R2 to be used for a bridged-tee attenuator.

Free Space Path Loss Calculator

Tools

This calculator calculates the free space loss, given the distance, frequency, and gain, between two antennas.

What is Network Analysis?

Textbook

The basic application of Ohm’s law to combinations of series and…

Balanced Attenuator Calculator

Tools

This balanced attenuator calculator helps you determine the resistor (R1) values for a balanced attenuator.

Finite-length Transmission Lines

Textbook

A transmission line of infinite length is an interesting abstraction,…

Successive Approximation ADC

Textbook

One method of addressing the digital ramp ADC’s shortcomings is…

Why digital?

Textbook

Although many textbooks provide good introductions to digital memory…

AC Instrumentation Transducers

Textbook

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

IGFET Amplifiers

Worksheets - Software-Defined Radio

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

JFET Amplifiers

Worksheets - Software-Defined Radio

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

Power in Electric Circuits

Textbook

In addition to voltage and current, there is another important…

Contact “Bounce”

Textbook

When a switch is actuated and contacts touch one another under the…

Fail-safe Design

Textbook

Logic circuits, whether comprised of electromechanical relays or…

Polarity of voltage drops

Textbook

When using conventional current flow, we can trace the direction of…

Time Constant Circuits

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

Light-Pulse Switch

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It is fairly important to use large value resistors (10 MΩ works…

Logarithms for Analog Circuits

Worksheets - Software-Defined Radio

The concept of a mathematical power is familiar to most students of…

Analog Lab - Precision Voltage Follower Using an Op Amp

Textbook

In this hands-on electronics experiment, you will build an op amp voltage follower and learn about negative feedback in operational amplifier circuits.

Microstrip Trace Width Calculator

Tools

This tool is designed to compute for the trace width of a microstrip

Decibels Equations

Textbook

  RELATED WORKSHEETS: Decibel Measurements Worksheet

Measurements of AC Magnitude

Textbook

So far we know that AC voltage alternates in polarity and AC current…

Asymmetric Stripline Impedance Calculator

Tools

This calculator helps you compute the characteristic impedance of an asymmetric stripline

Precise Diode Circuits

Worksheets - Software-Defined Radio

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

Beam Power Tubes

Textbook

In the beam power tube, the basic four-element structure of the…

The Unijunction Transistor (UJT)

Textbook

Unijunction transistor: Although a unijunction transistor is not a…