Can I connect unused CFB amplifer as attached jpg file without Rf?
As I konw, CFB input stage +/- are different from VFB. So this configuration can make oscillation and heat.
Looking for expertise's feedback.
You are correct that it would likely oscillate without a feedback resistor in the feedback path. You can verify this with the transimpedance and phase vs. frequency curve. With an Rf of 0, you would likely have little to no phase margin left to keep the amplifier stable. It would be best to use the recommended feedback resistor in the datasheet. What part are you using?
Appreciate on your prompt reply.
Unfortunately, I couldn't get the exact part name yet. Let me share with you as I have it soon.
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