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bukks bunny
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Hello friends.I was just wondering if a step up transformer can be used to amplify voltage signals like a transistor,as it step up input voltage at its output.?
nsaspook said:A normal transformer can't provide power gain but it's possible to control the "energy coupling" from input to output with a low power signal using a 'Mag-Amp".
http://en.wikipedia.org/wiki/Magnetic_amplifier
sophiecentaur said:You should make it clear that the signal in this case, also, uses / controls an external source of power,
unclebob said:hi guys: So is it a signal or out put power that's in question? A signal being used as a control?
Nuclear_chita said:Nope, and yes may be. it depends upon your source. if it is capable to supply larger currents then yes. If you want to increase voltage and amount of current does not matter for you then obviously transformer can amplify the voltage(but current will be reduced to make the power constant p=vi).
bukks bunny said:Hello friends.I was just wondering if a step up transformer can be used to amplify voltage signals like a transistor,as it step up input voltage at its output.?
skeptic2 said:OP specifically asked about amplifying voltage and it most of the responses discuss amplification in terms of power.
The quick answer is yes, a step-up transformer can amplify voltage. Let me give you an example. I was working for a company that used ferrite antennas resonant to 200 kHz. The coil around ferrite rod had a low impedance tap to connect to the coax cable. In order to improve the range I discovered by supplying DC through the cable, I could operate a single stage FET amplifier with the gate connected across the full coil instead of just the low impedance tap. Sure the FET added gain but not as much as the difference between using the voltage across the full length of the coil and the tap.
I think you are defining the word to fit your argument. Since the OP only indicted a concern with voltage and since the following definition does not specifically refer to power, I take it to mean making larger, greater or stronger the voltage. Speaking of semantics...sophiecentaur said:This can be dismissed as a matter of semantics but I feel it's more important than that.
The word 'amplification' is used, loosely (sloppily, even) in both cases but it strictly means 'making a signal bigger' i.e. more powerful.
A transformer can step up the voltage, but in EE this is not referred to as amplification. It is termed magnification. The word "amplification" is restricted to applications involving an active device, viz., an amplifier. The distinction may seem slight, but in practice it really isn't.bukks bunny said:Hello friends.I was just wondering if a step up transformer can be used to amplify voltage signals like a transistor,as it step up input voltage at its output.?
Please support your statement with a reference.NascentOxygen said:Hi bukks, http://img96.imageshack.us/img96/5725/red5e5etimes5e5e45e5e25.gif
A transformer can step up the voltage, but in EE this is not referred to as amplification. It is termed magnification. The word "amplification" is restricted to applications involving an active device, viz., an amplifier. The distinction may seem slight, but in practice it really isn't.
Et tu.skeptic2 said:Please support your statement with a reference.
Which implies that the use "voltage amplifier" is an improper usage of the term.An electronic amplifier or amplifier is an electronic device used for increasing the power of a signal.
skeptic2 said:Please support your statement with a reference.
bukks bunny said:Hello friends.I was just wondering if a step up transformer can be used to amplify voltage signals like a transistor,as it step up input voltage at its output.?
Now that's a new perspective. (Even though you don't follow through with it.)skeptic2 said:Again, back to the OP's question, interpreted as the OP intended.
Welcome back. There should be a warning given to newcomers that involvement with PF can be a health hazard.bukks bunny said:heloo friends.First of all,sorry for my long leave as i had fallen sick.
After the signal has been stepped-up by the transformer, what are you going to do with that signal? Most times you're going to feed it into an amplifier or some other electronic circuit. So why not incorporate the "magnifying" function into your electronic circuit and skip the transformer⁈And thanks for all your response.What i was trying to figure out was that if a transformer can increase the amplitude of a voltage signal while preserving its exact shape why not it be used in place of bjt or fet votage amplifiers (as both do the same job).?
bukks bunny said:heloo friends.First of all,sorry for my long leave as i had fallen sick.And thanks for all your response.What i was trying to figure out was that if a transformer can increase the amplitude of a voltage signal while preserving its exact shape why not it be used in place of bjt or fet votage amplifiers (as both do the same job).?
As the prime concern was increasing the voltage amplitude(voltage gain) i guess i could use a step up tranformer in circuits where size doesnot matter.sophiecentaur said:When all you need is increased amplitude of a voltage signal and when the pass-band is narrow then a transformer can be used.
bukks bunny said:As the prime concern was increasing the voltage amplitude(voltage gain) i guess i could use a step up tranformer in circuits where size doesnot matter.
A step up transformer amplifies signals by increasing the voltage while decreasing the current. This is achieved by having more turns on the secondary coil compared to the primary coil, resulting in a higher voltage output.
Yes, a step up transformer can amplify all types of signals, including audio, video, and electrical signals. However, the amplification may vary depending on the frequency and impedance of the signal.
No, a step up transformer is not the same as a voltage amplifier. While both can increase the voltage of a signal, a voltage amplifier uses active components such as transistors or op-amps, while a step up transformer uses only passive components.
No, a step up transformer will always have some loss due to factors such as resistance, inductance, and capacitance. However, the loss can be minimized by using high-quality materials and proper design techniques.
Yes, there are limitations to the amplification capabilities of a step up transformer. The maximum voltage output is limited by the insulation and breakdown voltage of the transformer, and the maximum current output is limited by the wire gauge and core size of the transformer.