RF/IF Circuits - An Introduction

Within a radio receiver circuit, the RF front end is a term used to identify the circuitry between an antenna and a first IF stage. It is comprised of the components within the receiver used to process a signal at the original incoming RF, before it is converted to IF. Within microwave or satellite receivers, the circuitry is often called Low Noise Block (LNB) or Low Noise Downconverter (LND), usually located at the antenna, so the signal can be more easily transferred to the rest of the receiver at IF.

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What are analog filters?

Over the years, analog filters have served an important role in electronics development. Analog filters are a critical component in technological advancements and a source of large profits in the telecommunications industry. Early analog filters were highly involved with transmission lines, which then led to filter theory used in transmission lines for telecommunications. In terms of signal processing often used for electronics, analog filters are needed for separating, combining, selecting, or rejecting certain signals.

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Introduction to Analog Electronic Circuits

Analog electronic circuits are suitable in today's electronics and computer industries for many functions, especially receiving and transmitting signals. Although digital technology has taken the forefront for much of the industry's computer technology, analog electronic circuits have their place.

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What is an audio amplifier?

An audio amplifier is a system used to increase the sound of an audio signal. Often, the word "amplifier" refers to components used for musical or stereo equipment, but there are various types of audio amplifiers found in dozens of other audio based products and equipment: televisions, computers, mobile phones, and most any device that uses a speaker or multiple speakers to produce and magnify sound.

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Differences between Analog and Digital Electronics

While both analog and digital signals are used for the transmission of information through electric signals, they are quite different. In analog electronics, the electric pulses vary in amplitude while in digital electronics, binaries are represented by two different amplitudes.

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What is analog signal processing?

In order to understand analog signal processing, it will help to break down the phrase. Analog refers to a continuous signal with limitless bandwidth that provides a spectrum of information. Analog usually pertains to a device or equipment that is represented mathematically, by continuous values. Often times, analog values are described as voltage, or electric charges or currents, from an electronic device. Analog signal processing refers to a signal or noise, produced and sent as a result of a physical measurement.

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How does an analog computer work?

To understand the interworking of an analog computer, it is helpful to know what it is and what it is used for. Analog computers are often used for production and science related research and design, and they vary in complexity. They were originally found in speedometers, watt-hour meters, auto transmissions, adding machines, mechanical clocks, gun-fire control, and many other devices and equipment that required mathematical calculations.

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