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ulna

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    Stable DC power supply point for Ultra Low Noise Amplifier (ULNA)

    Hello good people, I need help. I'm posting a schematic of an ultra low noise amplifier. It is to be powered by batteries. For that reason, I need a stable DC solution in the place of R4 resistor. I was proposed to achieve that by using another JFET and an integrator circuit, but I am not...

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