An active device is any type of circuit component with the ability to electrically control electron flow (electricity controlling electricity). In order for a circuit to be properly called electronic, it must contain at least one active device. Components incapable of controlling current by means of another electrical signal are called passive devices. Resistors, capacitors, inductors, transforme
The practical benefit of active devices is their amplifying ability. Whether the device in question be voltage-controlled or current-controlled, the amount of power required of the controlling signal is typically far less than the amount of power available in the controlled current. In other words, an active device doesn't just allow electricity to control electricity; it allows a small amount of
Because amplifiers have the ability to increase the magnitude of an input signal, it is useful to be able to rate an amplifier's amplifying ability in terms of an output/input ratio. The technical term for an amplifier's output/input magnitude ratio is gain. As a ratio of equal units (power out / power in, voltage out / voltage in, or current out / current in), gain is naturally a unitless measur
In its simplest form, an amplifier's gain is a ratio of output over input. Like all ratios, this form of gain is unitless. However, there is an actual unit intended to represent gain, and it is called the bel. As a unit, the bel was actually devised as a convenient way to represent power loss in telephone system wiring rather than gain in amplifiers. The unit's name is derived from Alexander
It is also possible to use the decibel as a unit of absolute power, in addition to using it as an expression of power gain or loss. A common example of this is the use of decibels as a measurement of sound pressure intensity. In cases like these, the measurement is made in reference to some standardized power level defined as 0 dB. For measurements of sound pressure, 0 dB is loosely defined as th
Attenuators are passive devices. It is convenient to discuss them along with decibels. Attenuators weaken or attenuate the high level output of a signal generator, for example, to provide a lower level signal for something like the antenna input of a sensitive radio receiver. (Figure below) The attenuator could be built into the signal generator, or be a stand-alone device. It could provide a fix
Description: Here are two simple Junk Box but extremely useful circuits. They are designed to amplify those flimsy 2.4 GHz Pinhole cameras with such annoyingly low power and short range.The two transistor version [A] is merely a cascaded version of [B] for greater output. The one transistor version in [B] will easily penetrate two walls of an average household, while the cascaded version [
To date back history, the very first amplifiers make use of vacuum tubes which is a component utilized to increase and modify electric signal through the process of calculating the progression of electrons and they often comes in tubular shape. These vacuum tubes were packed with low-pressure gas. It was in the year 1874 when Ernst W. Siemens introduced his very first invention which is a "dynamic
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24-07-2008:
The Blurb: Masotti is the result of expert engineers and guitarists working closely together toward one goal: realize the best tone possible for the electric guitar.
What was discovered is now easily available to all serious guitarists who are tired of accepting compromises in their sound. find out more
Brett Garsed: Masotti Guitar Devices
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A number of companies now have tried going down the compact-design route when it comes to amplifier construction. Companies such as Alpine, Pioneer, and even Kicker have their versions of compact amplification design.As technology progresses, things get smaller. It’s the nature of the beast, and there’s nothing stopping the industry from continuing on this development. JVC’s 2008 Arsenal amp
LAS VEGAS (Business Wire) Pioneer Electronics Inc. launched 2 mono Class-D car amplifiers to join its family of GM-series car audio amplifiers. Two New Amplifiers Incorporate Digital Technology Making Them More Efficient. These new car amplifiers are designed to combine high power output and high efficiency while simultaneously producing the high-fidelity audio Pioneer is known for.The Pioneer GM-D7400M and Pioneer GM-D8400M digital mono amplifiers, intended for powering large subwoofers, use digital technology that make them 80-95 percent more efficient than conventional class A/B amplifiers. Due to the increased efficiency, the physical size of the new amplifiers was also reduced by 45%, making them more compact and easier to install.“Adding an amplifier to an in-car entertainment syst
Guitar amplifiers IconsPC & OSX - ICO/PNG/JPG/ICNS - 4 MbJust a few amps too look nice with the guitars i've posted before. Icons for PC (also Vista) and OSX.Download from:Easy-Share ORDepositfilesDownload from:Easy-Share ORDepositfileswww.GraphicArea.blogspot.com
Here is your complete resource for state-of-the-art and cutting-edge techniques used for designing and fabricating broadband amplifiers. The book covers the complete design cycle, detailing each stage in a practical, hands-on manner to enable one to quickly gain specialist knowledge and insight into the intricacies of broadband amplifier design. Beginning with a discussion of amplifier theory
