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abs_vicky
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Can anyone please give me the design of a high power opamp based amplifier, Vcc(100-200V, single power supply), Output current(tens of amperes)
Antiphon said:The OPA541 may be about as close as you're going to get. It has the drive current but not the voltage you want.
http://focus.ti.com/lit/ds/symlink/opa541.pdf
It's not quite correct to say that the output stage of a Fender or Marshall tube amp is an op-amp. It is not. An op-amp is a DC coupled amplifier with immense gain. The output stage of the typical push-pull tube guitar amplifier is never DC coupled and has a voltage gain between input and output of perhaps 10 or 20. It has a very high power gain begin able to take a 2 volt signal at it's input and turn it into a 20 volt signal into an 8 ohm load.
An Opamp based power amplifier is a type of electronic amplifier that uses operational amplifiers (Opamps) to amplify and power a signal. It is commonly used in audio and communication systems to increase the amplitude of a signal without significantly affecting its quality.
An Opamp based power amplifier works by taking an input signal and amplifying it through the use of operational amplifiers. The Opamps have a high gain, which allows them to amplify the signal without introducing distortion. The output of the Opamp is then further amplified by transistors to provide the desired level of power.
Some advantages of using an Opamp based power amplifier include its high gain, low distortion, and low output impedance. It also has a wide bandwidth and can be easily configured to suit different applications. Additionally, it requires fewer components compared to other types of power amplifiers, making it cost-effective.
The key components of an Opamp based power amplifier include an operational amplifier, transistors, resistors, and capacitors. The Opamp is the main amplifying element, while the transistors are used to provide the necessary power. The resistors and capacitors are used to set the gain and frequency response of the amplifier.
An Opamp based power amplifier differs from other types of power amplifiers in its use of operational amplifiers. The Opamp provides a high gain and low distortion, making it suitable for high-quality audio and communication applications. It also has a simple design and requires fewer components compared to other types of power amplifiers.