One of the most desirable solutions is achieved by the use of a non-linear amplifier for Af.

Below this level, the amplifier gain Af is proportional and is of small value, in order to provide adequate noise filtering.

When the system is on automatic leveling, the gyro drift is canceled by the output of the leveling system ( amplifier Af ).

Another feature to make LS AAS element-specific is modulation of the primary radiation and the use of a selective amplifier that is tuned to the same modulation frequency, as already postulated by Alan Walsh.

An amplifier is a device for increasing the power of a signal by use of an external energy source.

In an electronic amplifier, the input " signal " is usually a voltage or a current.

The gain of an amplifier is the ratio of output to input power or amplitude, and is usually measured in decibels.

The bandwidth of an amplifier is the range of frequencies for which the amplifier gives " satisfactory performance ".

Based on this definition, the drain efficiency cannot exceed 25 % for a class A amplifier that is supplied drain bias current through resistors ( because RF signal has its zero level at about 50 % of the input DC ).

When the signal drive to the amplifier is increased, the output also increases until a point is reached where some part of the amplifier becomes saturated and cannot produce any more output ; this is called clipping, and results in distortion.

In most amplifiers a reduction in gain takes place before hard clipping occurs ; the result is a compression effect, which ( if the amplifier is an audio amplifier ) sounds much less unpleasant to the ear.

In 2006 Marshall designed new, prototype versions of " Murder One " which were then put into production, and the original amplifier was retired.

A Los Angeles radio manufacturer named Van Nest designed the first Electro String production-model amplifier.

The common-emitter amplifier is designed so that a small change in voltage ( V < sub > in </ sub >) changes the small current through the base of the transistor ; the transistor's current amplification combined with the properties of the circuit mean that small swings in V < sub > in </ sub > produce large changes in V < sub > out </ sub >.

In a well designed receive chain, only the noise factor of the first amplifier should be significant.

While originally designed to handle logic-level digital signals, a TTL inverter can be biased as an analog amplifier.

Another technique to exhaust victim resources is through the use of an attack amplifier — where the attacker takes advantage of poorly designed protocols on 3rd party machines, such as FTP or DNS, in order to instruct these hosts to launch the flood.

Poorly designed horns, or improperly crossed-over horns, have predictable problems in the accuracy of their output, and the load that they present to the amplifier.

Normally the crossover and speaker system, including the woofer, are expected to convert the electrical signal supplied by the amplifier to an acoustic signal of identical waveform without other interaction between the amplifier and speakers, although sometimes the amplifier and speakers are designed together with the speakers supplying distortion-correcting negative feedback to the amplifier.

They added a motion sensor to the woofer, and used the signal corresponding to its actual motion to feedback as a control input to a specially designed amplifier.

Woofers designed for public address system ( PA ) and instrument amplifier applications are similar in makeup to home audio woofers, except that they are usually designed more ruggedly.

This includes its massive horn loudspeakers designed to fill a large theater with sound from a relatively low-powered tube amplifier.

The guitars, bass guitars, and amplifiers he designed from the 1940s on are still relevant: the Fender Telecaster ( 1950 ) was the first mass-produced electric guitar ; the Fender Stratocaster ( 1954 ) is among the world's most iconic electric guitars ; the Fender Precision Bass ( 1951 ) set the standard for electric bass guitars ; and the Fender Bassman amplifier, popular enough in its own right, became the basis for later amplifiers ( notably by Marshall and Mesa Boogie ) that dominated rock and roll music.

In 1945, they began selling the guitar, in a kit with an amplifier designed by Fender.

The original video amplifier circuit path on the motherboard was poorly designed and created faint black lines in the game image.

This type of amplifier is available in a range of formats, ranging from smaller combo amplifiers for rehearsal and warm-up purposes to heavy " heads " which are designed to be used with separate speaker cabinets, which is colloquially referred to as a " stack.

The exception to this rule is keyboard amplifiers designed for the Hammond organ, such as the vintage Leslie speaker cabinet and modern recreations, which have a tube amplifier which is often turned up to add a warm, " growling " overdrive to the organ sound.

They are similar in many ways to keyboard amplifiers, in that they have a relatively flat frequency response, and they are usually designed so that neither the power amplifier nor the speakers will introduce additional coloration.

Feedback-free instrumentation amplifier is the high input impedance differential amplifier designed without the external feedback network.

A guitar amplifier ( or guitar amp ) is an electronic amplifier designed to amplify the electrical signal of an electric or acoustic guitar so that it will produce sound through a loudspeaker.

It was an acoustic archtop fitted with a guitar pickup, which sensed the vibrations in the metal strings so that they could be amplified by a guitar amplifier.

The magnitude of A < sub > OL </ sub > is not well controlled by the manufacturing process, and so it is impractical to use an operational amplifier as a stand-alone differential amplifier.

A once-popular form of this instrument used a vacuum tube in the amplifier circuit and so was called the vacuum tube voltmeter, or VTVM.

The amplifier amplifies small currents so that they are more easily measured.

While the compression used in audio recording and the like depends on a variable-gain amplifier, and so is a locally linear process ( linear for short regions, but not globally ), companding is non-linear and takes place in the same way at all points in time.

For a Pockels cell, it is usually hundreds or even thousands of volts, so that a high-voltage amplifier is required.

The amplification bandwidth of Raman amplifiers is defined by the pump wavelengths utilised and so amplification can be provided over wider, and different, regions than may be possible with other amplifier types which rely on dopants and device design to define the amplification ' window '.

During operation, it is common for a vehicle's charging system to fluctuate, so a regulated amplifier will maintain its power output regardless of voltage fluctuation.

A bandpass amplifier would amplify the signal, so it could be detected.

The " amplifier " is actually an electrometer, sometimes referred to as a " unity gain amplifier "; its main job is to change the nature of small signals ( in the mV range ) produced by cells so that they can be accurately recorded by low-impedance electronics.

* Power amplifier, a system used to amplify speech or music so that they may be heard by large crowds of people, especially outdoors

A negative feedback amplifier ( or more commonly simply a feedback amplifier ) is an amplifier which combines a fraction of the output with the input so that a negative feedback opposes the original signal.

Amplifiers use current or voltage as input and output, so four types of amplifier are possible.

Woofer power ratings become important when the speaker is pushed to extremes: applications requiring high output, amplifier overload conditions, unusual signals ( i. e., non-musical ones ), very low frequencies at which the enclosure provides little or no acoustic loading ( and so there will be maximum cone excursion ), or amplifier failure.

The L / C ratio, in turn, determines their Q and so their selectivity, because the rest of the circuit-the aerial or amplifier feeding the tuned circuit for example-will contain present resistance.

An ideal operational amplifier also has infinite input impedance, so unlike a real short circuit, no current flows between the terminals of the virtual short.

Boon's guitar style is very distinctive ; he rarely used distortion and frequently set the equalization on his amplifier so that only the treble frequencies were heard-the bass and midrange frequencies would be turned off completely.

There being no standards, imaginative approaches came to be so common that the US Federal Trade Commission intervened in the market and required all amplifier manufacturers to use an engineering based measure ( root-mean square ) in addition to any other value they might cite.