0
What is the class of amplifier operation is used in almost all high-quality audio power amplifiers?
Jhareus1
A: class a
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
What is the basic difference between transistor as an amplifier and a step up transformer?
The output power of an amplifier is greater than its input power, whereas the output power of a transformer is almost the same as its input power. In other words, an amplifier increases acts to increase power, whereas a transformer only increases voltage.
What is the differences between fixed biased configuration and voltage divider configuration of a common BJT circuit?
In the fixed.bias biasing several key parameters of the amplifier depend on the Beta of the transistor. This parameter has a wide variation (often 5 to 1 or more) for a particular transistor type. Thus, if you need to make a production run of a number of identical amplifiers, this variation in the Beta is unacceptable. In the voltage-divider stabilized method the performance of the amplifier is independent of Beta (or almost). Thus, this design is suitable to be used in the production of a large number of identical devices. In terms of biasing, a voltage divider circuit helps offset the effect of changes in the beta value of the transistor. So it's said to be more 'stable' because heating of the transistor, or swapping transistors entirely (both of which affect beta) will not greatly affect the output of the circuit. As far as the actual output is concerned, I believe both circuits have similar input/output impedance ranges and similar voltage gains. But the fixed biased circuit typically has more current gain.
What is Analog multiplier using emitter coupled transistor pair?
The standard analog multiplier circuit (i.e. multiplying two analog signals to generate a product analog signal) sums the logs of the inputs then takes the antilog to form the output. The log and antilog functions are approximated using the base-emitter curve of transistors. The rest of the circuit is opamps, which have emitter coupled differential transistor amplifiers at their core. This however is limited to positive values only, and is called a one quadrant multiplier. Perhaps you are asking instead about a type of analog multiplier using two cross-connected emitter coupled differential transistor amplifiers and several constant current sources for bias. The main advantages of these is they can correctly handle negative numbers, and are thus called four quadrant multipliers, and they are almost trivial to integrate compared to the opamp version.
What is the expected amplification of a BJT transistor amplifier if the dc supply is set to zero volts?
It is almost equal to zero volts because no device in this universe can amplify the power --output will be in confine to millivolt or less due to applied magnitude of input signal and ambient noise according to principle Energy can't be created nor destroyed it can only be transferred from one form to another form.
Wnich amplifier to use for fusion 15subwoofer model no.FJL1511?
Not sure which amp is the BEST to use but I am running two fjl-1511's on one nv-am25001 Fusion amp. I have literally shocked almost anyone who hears it, even had a couple people jump out of the car because the pressure scared them. There is almost nothing that doesn't flex (1998 Z28 Camaro). Box is (two) 2.5cuft chambers. I built it myself and have been building custom audio boxes for more than 10 yrs. This is by far the loudest setup I have heard to date. Hope this helps. Matt (skraelos1@yahoo.com)
What are Biological amplifiers in medical electronics?
Biological signal amplifiers are amplifiers designed to convert the weak voltage signal generated by various biological processes (nerve activity in EEGs, heart muscle activity in EKGs, etc.) into a strong signal. Almost every biological signal amplifier is built from an integrated circuit instrumentation amplifier.
Why the name push pull is given to class B power amplifier?
Because two amplifiers are used to accomplish class B power amplifier. One is used to push the current and the other one is used to pull the current. These two amplifiers are almost same but one is connector supplied and the other one is emitter supplied.
How have amplifiers changed the society over the past decades?
The changes on society affected by amplifiers are almost as numerous as the number of devices that use them. Consider all the modern electronic equipment and all the electronic "toys" we have. Almost all of them have an amplifier of one kind or another in them. The amplifiers have allowed us to communicate better and more effectively. We can see and hear things at a distance that we never used to be able to. Business is electronically propped up in more ways than can be counted. Our work, our play and almost every aspect of or lives is touched directly or indirectly by electronic amplifiers.
Where can someone purchase an Ampeg bass guitar amp?
One may purchase an Ampeg bass guitar amplifier from "Gear 4 Music". They have very competitive prices and a wide range of amplifiers to suit almost any budget.
Class C amplifiers are almost always?
Olmost always older amps...
How do you connect a BBE Sonic Maximizer to an integrated amplifier that does not have pre out and main in jacks?
Good AV amplifiers should always feature a pre-amp out and main in connection. The cost of the connection is minimal for the manufacturer and there is little excuse for failing to have them. There are a number of options that can be considered. First, amplifiers often have a "tape out" connection and a "tape return" or "tape in" connection. These are almost the same as a pre out and main in but a "tape monitor" switch will need to be set on the front panel. See the amplifier manual to see if it has the facility and for detailed information Next, if only one input is used, the audio processor can be inserted between the source and the input to the amplifier. This works well if only a single input needs to be processed but won't handle multiple input sources. The last option (and the most difficult) is to extract the pre-amplifier signal from the amplifier. This needs good knowledge of the electronics in the amplifier and sufficient skill to undertake some small modifications to the circuitry. Although the process is not difficult, it should be left to a properly qualified engineer to ensure proper operation and safety. The end result should be 2 pairs of RCA or phono connectors on the rear panel of the amplifier. For more information on this solution, contact an audio visual systems company or repair center.
What kind of shop sells amplifier?
you can shop almost at any store for an amplifier but most likely best buy
What is a sentence with the word amplifier?
We set the amplifier's volume all the way and I almost became deaf because of the blaring sound!
What is transformer coupling in power amplifiers?
in certain power amplifiers(cls A,cls C etc.) the output sometimes not directly taken. rather it's coupled with transformer and then transferred power is applied to the load..this is transformer coupling..... there are two main reasons to do so 1. in order to increase the efficiency.(exmpl: efficiency of class A power amplifier increase by almost 25%) 2.in order to get smooth i.e; distortion less output.. by Jishnu Mukherjee (Kolkata,India)
How you differentiate amplifier and transformer?
A big difference. A transformer converts power into more useful means of transportation or matching to the end results.Pincoming = IPVP = Poutgoing = ISVS.giving the ideal transformer equationVs/VP= Ns/NP=IP/Isthen as the outgoing voltage of the transformer increase, the outgoing current will decrease. An amplifier adds power. For example, voltage amplifier add voltage (amplify) independent the amplifier current.
Was a military action in Afghanistan fought almost immediately after 9112001?
Operation Enduring Freedom
What is the basic difference between transistor as an amplifier and a step up transformer?
The output power of an amplifier is greater than its input power, whereas the output power of a transformer is almost the same as its input power. In other words, an amplifier increases acts to increase power, whereas a transformer only increases voltage.
