 #1
tadeh89
 8
 8
 TL;DR Summary

Hi everyone,
I have a good understanding of how an oscillator circuit is supposed to work, meaning zero phase shift and gain bigger than unity; however, I have not been able to make one work in practice. I am trying to utilize an LM741 opamp. I have tried a colpitts circuit, but I will use any topology at this point just to see it work at this high of a frequency, 1050MHz.
Questions:
1. Is LM741 capable of oscillating at 10MHz? If not, could you suggest me an affordable opamp for this operation?
2. How likely am I, as a beginner to be able to design a zero phase shift feedback filter to use with a noninverting opamp circuit to create an oscillator?
3. If an inverting opamp circuit is the way to go, how should I go about the feedback circuit? I have been trying to make a feedback circuit with low loss in the passband (6dBish), and 180 degrees phase shift, but I can't get both of them at the same time. At best, I was able to get 13dB loss and 180 degrees phase shift, but I am unsure if my opamp gain can compensate for 13dB plus a little.
Please take a look at my simulation for the filter/feedback portion in ADS. (images forum1 and forum2 belong to the same simulation, forum 3 is independant)
Any help/input will be appreciated.
Thanks all!
1. Is LM741 capable of oscillating at 10MHz? If not, could you suggest me an affordable opamp for this operation?
2. How likely am I, as a beginner to be able to design a zero phase shift feedback filter to use with a noninverting opamp circuit to create an oscillator?
3. If an inverting opamp circuit is the way to go, how should I go about the feedback circuit? I have been trying to make a feedback circuit with low loss in the passband (6dBish), and 180 degrees phase shift, but I can't get both of them at the same time. At best, I was able to get 13dB loss and 180 degrees phase shift, but I am unsure if my opamp gain can compensate for 13dB plus a little.
Please take a look at my simulation for the filter/feedback portion in ADS. (images forum1 and forum2 belong to the same simulation, forum 3 is independant)
Any help/input will be appreciated.
Thanks all!