front-end amplifier

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• RF front end — is a generic term for everything in a receiver that sits between the antenna and the intermediate frequency (IF) stage.For most super heterodyne architectures, this part of the receive chain consists of:* A matching circuit to allow all the… …   Wikipedia

• Valve audio amplifier - technical — Circuitry and performance Characteristics of valves Valves are very high input impedance (near infinite in most circuits) and high output impedance devices. They are also high voltage / low current devices.While valves themselves are described… …   Wikipedia

• Isolation amplifier — Articleissues confusing=December 2007 unreferenced=December 2007 orphan=December 2007Isolation amplifiers provide electrical isolation and an electrical safety barrier. They protect data acquisition components from common mode voltages, which are …   Wikipedia

• Low-noise amplifier — The low noise amplifier (LNA) is a special type of electronic amplifier or amplifier used in communication systems to amplify very weak signals captured by an antenna. It is often located very close to the antenna, so that losses in the feedline… …   Wikipedia

• Guitar amplifier — Mesa Boogie Mark IV, a guitar combo amplifier A guitar amplifier (or guitar amp) is an electronic amplifier designed to make the signal of an electric or acoustic guitar louder so that it will produce sound through a loudspeaker. Most guitar… …   Wikipedia

• Superpulse — is the name for very strong radio signals, which are transmitted by the VLF transmitter GBZ and by an unidentified station on 17.8 kHz at certain times.The purpose of superpulses is unknown. Superpulses can overdrive the front end amplifier of a… …   Wikipedia

• Digital radio frequency memory — (DRFM) is an electronic method for digitally capturing and retransmitting RF signal. DRFMs are typically used in radar jamming, although applications in cellular communications are becoming more common. Overview A DRFM system is designed to… …   Wikipedia

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• Mesa Boogie Mark Series — The Mesa Boogie Mark Series is a series of guitar amplifier made by Mesa Engineering (more commonly known as Mesa/Boogie ). Originally just referred to as Boogies, the product line took on the moniker Mark Series as newer revisions were put into… …   Wikipedia

• Mesa Boogie — The Mesa Boogie logo Mesa/Boogie (also known as Mesa Engineering) is a company in Petaluma, California that makes amplifiers for guitars and basses. It has been in operation since 1969. Mesa was started by Randall Smith as a small repair shop… …   Wikipedia

• Delta-sigma modulation — Delta sigma (ΔΣ; or sigma delta, ΣΔ) modulation is a method for encoding high resolution or analog signals into lower resolution digital signals. The conversion is done using error feedback, where the difference between the two signals is… …   Wikipedia