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A signal has passed through three cascaded amplifiers each with a 4dB gainWhat is the total gain how much is the signal amplified?
Wiki User
∙ 13y ago
A: The gains add up to 12 db
Wiki User
∙ 13y ago
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What is the purpose of tube amplifiers?
An audio amplifier boosts sound levels. Audio amplifiers typically contain transistors, though the transistors are often packaged inside ICs (Integrated Circuits). A transistor is an electrical device that allows a small amount of voltage or current to trigger a larger level of voltage and/or current. So an amplifier reproduces the sound at a higher amplitude or strength. Of course, there are some tube-type amplifiers that are still in existence. Those are rare and it is hard to find the tubes. Vacuum tubes were what was in use before transistors. There are different types of audio amplifiers. Radios and televisions contain audio amplifiers to be able to drive the speakers. Once the audio signal is extracted from the radio waves and passes out of the detector stage, it is too weak to drive a speaker. Sound boards in computers are capable of driving headphones directly, though not always at a comfortable volume. If you want the volume to be louder, or you want to listen through speakers, you would do best to get a set of amplified speakers. They contain an amplifier inside, and that is why they require batteries or a power cord.
Why is gain affected when the bypass capacitor is open?
Applied input signal at the base of the amplifier appears across the emitter resistor (RE) due to inter electrode capacitance so it should be bypassed the emitter resistor (RE) through the bypass capacitor (CB). unbypassed signal will be amplified (common emitter amplifier) and reverse back from the emitter to the collector through the base, amplified signal from the emitter to the collector (common emitter amplifier) is 1800 out of phase to the amplified signal from the base to the collector (common base amplifier), so reduced the gain.
What is Low Level AM Transmitter?
There are two types of AM transmitters, High-level and low-level. Low-level transmitters don't have to go through quite as many amplifiers as high-level AM transmitters, as well as consuming less power than the high-level counterparts, but aren't as efficient.
What is A or C biasing?
The three standard forms of analog amplifier biasing are:class A - the amplifier is biased in the center of its linear operating range, this is the most linear but least efficient type of amplifier (because the transistors or tubes are always conducting, even when there is no signal to ampliify).class B - the amplifier is biased at the cutoff point, this is an efficient amplifier but is only linear if operated as a push-pull amplifier (because the transistors or tubes are in cutoff and not conducting when there is no signal and through one half of every cycle, a class B push-pull amplifier has two sections that operate on alternate halves of the cycle).class C - the amplifier is biased in hard cutoff so that only the peaks of the input signal are amplified, this is the most efficient amplifier (because the transistors or tubes may be in cutoff and not conducting for more the 85% of the time) but it is not capable of linear amplification. An amplifier biased as class C is only suitable for use in RF transmitter power stages, where a resonant LC tank circuit will be excited into oscillation by the output of the amplifier and complete the missing parts of the cycle.There are other forms of biasing (e.g. class AB) analog amplifiers that get some of the advantages of two of the standard forms. There are also forms of amplifiers having other nonstandard classes (e.g. class D) that are not analog amplifiers, but instead operate by amplifying pulses.
What is equivalent to a valve in an electric circuit?
Depends what you mean by valve.If you talking about something that can limit or adjust the amount of current through a circuit then a rheostat or potentiometer. This has the same function as a valve in a plumbing system.The term valve, can also refer to old "valve-tubes" which were used in early electrical circuits, these had various functions, but were mostly used as amplifiers or transistors/ switches.
What is the configuration of cascade amplifier?
In a cascade amplifier, two identical or non identical amplifiers are cascaded ,i.e., connected in series through a capacitor. They are mostly common emitter amplifiers that are cascaded together.The final gain of the cascaded amplifier is the product of the first amplifier's gain and the second amplifier's gain. However, the bandwidth of the cascaded version becomes lesser than the individual gains.
Which interrupt is cascaded to provide interrupts 9 through 15?
2
What is an electric guitar?
An electric guitar is a non-hollow guitar with its sound amplified through speakers(amplifiers). It can give you much better effects than the Acoustic. They can range from a measly 25 USD to about 10000 USD depending on the range you would like to purchase.
What is electric guitar?
An Electric Guitar is a non-hollow guitar with its sound amplified through speakers(amplifiers). It can give you much better effects than the Acoustic. They can range from a measly 25 USD to about 10000 USD depending on the range you would like to purchase.
What are charactersitics of two stage common emitter amplifiers?
less current flowing through them
Where are some of the places that one can purchase Sunn amplifiers?
Sunn amplifiers can be purchased from a variety of places. They can be purchased directly through the companies website. The amps can also be found on eBay and Craigslist.
Why does a person at a rock concert not feel gusts of wind coming through the amplifiers?
They do if close enough
How does a stereo power amplifier work?
Quite well. But what kind of amp? In general, the amp takes a "line level" signal (left and right channel) and puts it through a series of amplifiers to make the signal bigger (amplify it). This is an increase in what is called the "gain" of a given stage or of a series of stages. Small signals drive the "control" circuit of the semiconductor devices, which are the amplifiers themselves, and this causes large swings in the output voltage of the stage (giving the amp gain). After a few of these, the signal is sufficiently amplified and can be used to drive a pair of speakers.
How is sound generated from electrophones?
The sound is picked up either by a microphone or electric coil, amplified and output through speakers. Alternatively, in the case of electronic keyboards/organs, the sound is produced by an oscillator, shaped by 'envelope' circuits, amplified and output through speakers.
How does sound move through a medium?
Vibrations are carried through the atoms in a structure. When these vibrations travel through air, they are amplified by the ear drum and sensed by nerves as sound.
Where can one purchase an amplified home phone?
Amplified home phones can be purchased in several ways. They can be purchased through the local phone company that is in use in your home. Walgreens, Sears, Staples and Walmart also offer these phones.
How did amplifiers help singing?
you sing through a microphone and it makes the voice louder. the sound of the louder voice comes from the amplifier.
