Hi folks,
I am trying to make an amplifier to amplify a sine wave from the waveform generator chip AD9837.
I am looking to generate a +5V sine wave (AC coupled, 10Vpp) that will go through an inductor coil (1.5 ohms) with 500mA of current. If needed for circuit design purposes, I can add a resistor to the inductor coil. BTW the inductor coil is represented by the resistor Rload in the diagram below.
I have npn transistors, MOSFETs, and opamps in my toolbox so I thought it should be fairly easy to make this amplifier with what I have. I am not sure any of my opamps can output 500mA so I decided on using the npn transistor. I found a great tutorial using an npn transistor here:
http://www.atakansarioglu.com/transistorpracticalcommonemitteracamplifierdesignnpnsimple/
I am using the exact circuit in the tutorial, except that I went through and did the math to design this circuit for my purposes. I got through parts of the math but certainly not all of it and came up with the attached circuit called "my common emitter". The double ?? means that I did not solve for that component and it is a random value. Even the components I did solve for there could be mistakes. If anyone uses LTSpice I attached my partially solved circuit.
I am having a HELL of a time figuring this out. I have probably 10+ specific questions but I guess my first question is, is this the easiest way to amplify my sine wave?
I wanted to try a common source MOSFET amplifier but I want to simulate it in LTSpice before assembling the circuit and none of the MOSFETs in my collection have models in LTSpice. The reason I picked the common emitter circuit is because I have a BC33740 Transistor and I was able to find the LTSpice model for it. If y'all think that this common emitter IS a decent way to accomplish what I am going for then I will continue with the specific questions, but I thought it would be smart to broadly ask if this is a good method first. Thank you.
I am trying to make an amplifier to amplify a sine wave from the waveform generator chip AD9837.
I am looking to generate a +5V sine wave (AC coupled, 10Vpp) that will go through an inductor coil (1.5 ohms) with 500mA of current. If needed for circuit design purposes, I can add a resistor to the inductor coil. BTW the inductor coil is represented by the resistor Rload in the diagram below.
I have npn transistors, MOSFETs, and opamps in my toolbox so I thought it should be fairly easy to make this amplifier with what I have. I am not sure any of my opamps can output 500mA so I decided on using the npn transistor. I found a great tutorial using an npn transistor here:
http://www.atakansarioglu.com/transistorpracticalcommonemitteracamplifierdesignnpnsimple/
I am using the exact circuit in the tutorial, except that I went through and did the math to design this circuit for my purposes. I got through parts of the math but certainly not all of it and came up with the attached circuit called "my common emitter". The double ?? means that I did not solve for that component and it is a random value. Even the components I did solve for there could be mistakes. If anyone uses LTSpice I attached my partially solved circuit.
I am having a HELL of a time figuring this out. I have probably 10+ specific questions but I guess my first question is, is this the easiest way to amplify my sine wave?
I wanted to try a common source MOSFET amplifier but I want to simulate it in LTSpice before assembling the circuit and none of the MOSFETs in my collection have models in LTSpice. The reason I picked the common emitter circuit is because I have a BC33740 Transistor and I was able to find the LTSpice model for it. If y'all think that this common emitter IS a decent way to accomplish what I am going for then I will continue with the specific questions, but I thought it would be smart to broadly ask if this is a good method first. Thank you.
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