analog design

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  1. J

    inverting a negative voltage with an amplifier

    Hello, I'm having trouble thinking of a way to convert a negative voltage to a positive one with an inverting OPA. I have an input voltage range of [-5 to -1]V and I need to convert it into a positive voltage to compare it with a reference voltage ( regulation for my charge pump) and I only...
  2. J

    converting positive to negative voltage

    Hello, I'm new to the analog design world and I have a probably dumb question. I have a normally-on transistor that I want to shut off with a negative voltage. The issue is that I only have a positive supply voltage and so I thought that I can generate the negative voltage from GND by using a...
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