Signal Amplifier
Sunday, February 28th, 2010 |
Tracetone? Tone Generator and Amplifier Probe List Price: Sale Price: $36.94 You save: $28.04 (43%)  |
DescriptionIDEAL TONE GENERATOR & |
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Birds of Maryland, Delaware and New Jersey DVD List Price: Sale Price: $33.99 |
Description############################################################################################################################################################################################################################################################### |
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New Better Birdwatching Alaska And Yukon Field Guide DVD Over 90 Minutes Of Video And Audio List Price: Sale Price: $33.99 |
DescriptionBeginning and advanced birdwatchers will enjoy viewing unique and entertaining behaviors, preferred habitats for each species, and diagnostic field marks and sounds for species identification. |
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AMP SOHO WIRELESS 50DB DUAL 800/1900MHZ List Price: Sale Price: $284.75 |
DescriptionThe Dual-Band SOHO Amplifier improves signals by 50 decibels in the Cellular (824-894 MHz) band and the PCS (1850-1990 MHz) band and works with Verizon, US Cellular, Cellular One, Alltel, Bell Canada, Telus, Cingular, Sprint, T-Mobile and all other Cellular and PCS carriers. |
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Antennacraft 10G201 High Input Amplifier - Amplify Digital and Analog VHF/UHF Signals (1 Each)
Sale Price: $38.76 |
DescriptionAntennacraft 10G201 High Input Amplifier - Amplify Digital and Analog VHF/UHF Signals (1 Each) |
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Motorola Signal Booster 484095-001-00 Bi-Directional RF Amplifier List Price: Sale Price: $37.96 You save: $62.03 (62%) |
DescriptionWhen using your TV or computer, there's nothing more frustrating than encountering poor reception. Now there's a fast and effortless way to make your signal strength up to 32 times more powerful! The Motorola Signal Booster enhances analog and digital picture quality, improves cable modem communication, and reduces lost data... |
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"F Type 75 Ohm Terminator, Pkg/10" List Price: Sale Price: $0.89 |
Description"Also known as Dummy Loads, terminators are an essential component in the proper termination of unused outputs of line splitters and amplifiers which utilize a Type F interface. Available in packages of 10 pieces... |
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Motorola Signal Booster 4-Port BDA-S4 Cable Modem TV HDTV Amplifier
Sale Price: $44.90 |
DescriptionThere is nothing worse than having a great TV to watch your favorite programs, while having a grainy or pixilated (digital cable) picture. Motorola BDA amplifiers give your TV signal a boost while maintaining full compatibility with all of your cable services... |
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30dB Powerful Amplified External GPS Antenna Receiver for Tomtom ONE, ONE XL, GO 510, 520, 530, 630, 710, 720, 730, 910, 920, 920 Traffic and GO 930 with Magnetic Base Mount
Sale Price: $8.99 |
DescriptionCompatible WithTomtom GO 510Tomtom GO 520Tomtom GO 530Tomtom GO 630Tomtom GO 710Tomtom GO 720Tomtom GO 730Tomtom GO 910Tomtom GO 920Tomtom GO 920 TrafficTomtom GO 930Tomtom ONE XLTomtom ONETomtom ONE XL*S |
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CMOS: Mixed-Signal Circuit Design, Second Edition List Price: Sale Price: $102.25 You save: $20.25 (17%) |
DescriptionAnalog signal processing circuit blocks implemented in mixed-signal systems utilize more digital signal processing where the quality of the analog components can be reduced at the cost of digital system complexity... |
How Do Guitar Amplifiers Work?
Guitar amplifiers amplify the sound fed into it from the guitar and drive the guitar loudspeaker. The sound waves generated by the guitar strings are converted into minute electrical signal with the help of the guitar pick up and then fed into the guitar amplifier (or simply guitar amp). Depending on whether or not the input of the guitar amp can work with the minute signal coming from the guitar, the guitarist may need to feed the guitar signal first into a pre-amplifier and then take the output from the pre-amplifier to feed the guitar amp.
The working of a guitar amp typically has four stages – input, signal modulation, signal amplification and then finally the output stage.
Input Stage
The input stage of the guitar amp accepts the input signal either from the guitar pre-amp or directly from the guitar itself. Normally, there are input female jacks installed onto the amplifier where you attach the input signal cable. If the guitar signal is too weak to be fed into the guitar amp, the signal should first pass through a guitar pre-amp. It is very important that there is proper impedance matching between the available input signal impedance and specified guitar amplifier’s input signal impedance. More often than not, signal impedance mismatch is the cause of deterioration of the final guitar sound on the loudspeaker.
Nowadays, there are many guitar amps, which have a pre-amplification stage incorporated into them. For such amps, you do not need to pass the guitar signal into a separate pre-amp. You can directly feed the signal into the amp itself.
Signal Modulation Stage
Plain in and plain out is not exactly the way normal electric guitarist likes it. He wants the guitar sound to be jazzed up, twangy, funky, heavily distorted etc. etc. For such sounds, the input signal has to under go modulation before they can be amplified. Say suppose the guitarist wants a heavy distortion akin to heavy metal rock sound. To get this type of sound, the input signal is fed into the signal modulation stage where the signal undergoes the required (but controlled) distortion. The same applies to other sound effects like wah-wah sound, reverb etc. Many guitar amps have equalizers and other tone control knobs, which also come under the signal modulation stage.
Signal Amplification Stage
The signal amplification stage is the ‘business’ stage of any guitar amp. It is here where the guitar sound is actually amplified. Good guitar amps will faithfully magnify the signal coming from the Signal Modulation Stage, i.e. the incoming signal will be the exact replica of this stage’s outgoing signal, only that it will be of much greater amplitude. It is the ‘business’ of any amplifier (be it voice or guitar amp) to faithfully amplify the incoming signal.
Output Stage
This is the final stage of all guitar amps. Some guitar amps have the output driver stage as a part of the output stage, while some of them do not. In some cheap guitar amps, the outgoing signal from the signal amplification stage is directly fed into the loudspeaker. However, good guitar amps have proper signal conditioning output stage where it is ensured that output signal is properly matched to the input specifications of the loudspeaker.
Every good guitarist should have good knowledge about guitar amps. Getting a good guitar amp is very important if you wish to have a reliable and predictable output musical sound whilst playing your guitar.
About the Author
For more information and reviews on guitars, guitar amplifiers and equipment visit GuitarHeadz.com, the complete guide for anything you want to know about guitars and related gear.
How can I use an operational amplifier to amplify an audio signal?
It's simple. I want to take an input audio signal voltage, put it through some kind of op-amp circuit, and have it come out with a higher amplitude. What's the simplest way to do this? Can you show me a circuit with this purpose, and possibly explain it?
Since we can't easily draw a diagram here, please look at the circuits on the following page. It has several opamp circuits that you could choose from.
http://www.circuitstoday.com/category/audio-circuits
Some have elaborate frequency trimming controls but most use variations of the same circuit.
As always with opamps, there is a compromise between gain and bandwidth. Circuits that use a high gain may not have enough high frequency response. You can substitute better opamps if noise performance is important.
The gain of these opamp circuits is controlled by the ratio of the feedback resistor (from output to inverting input) to the input resistor (from signal source to non inverting input). Look for these two resistors and make the feedback resistor bigger if you want more gain.
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Boost your HDTV Signal to any location at any length directly from one HDTV Amplifier
