Hello everyone, I created this pattern based on other patterns found elsewhere. Unfortunately, it doesn't work as I would like, and I explain why. The initial idea was to create a multi-stage circuit where each stage guaranteed a fixed gain, but this does not happen since when I join the next stage I lose gain in the previous stage. Another problem is the loss of phase linearity. For example, between the input point IN and the output of the first stage A1, I have a drift of -33 ° at 10Mhz. This I would like to avoid even at the cost of changing components as it is an old JFet that can be good for guitars but probably not for this purpose. I have tried other Fet, but the drift problem occurs in an accentuated way in all of them. Maybe I haven't found the right component, or it doesn't exist. The number of stages is theoretically unlimited, this is to say that I would not worry about having 10-15 stages with low gain and high phase linearity if the conditions I will write below are present. So the request for help (if possible) concerns:
1) Gain stabilization (even less than 10 if necessary to limit phase drift) on each stage so that each stage offers and maintains a stable gain at the next stage.
2) limit as much as possible the phase drift described above.
Thank you in advance.
1) Gain stabilization (even less than 10 if necessary to limit phase drift) on each stage so that each stage offers and maintains a stable gain at the next stage.
2) limit as much as possible the phase drift described above.
Thank you in advance.
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