I have a 2.5V DC output signal ( its range is 0.5V to 4.5V), it needs to be scaled from 25% of supply to 75% of supply voltage. The supply voltage is a variable.Due to constraints i cannot use microprocessors or other fancy signal processing parts, need to stick with basic parts like opamps , resistors bridges ect. 0.5V output needs to be scaled to 25% of supply voltage and 4.5V output output needs to be scaled to 75% of supply voltage. Essentially the output needs to be ratiometric to supply voltage. Is there a way to do it with basic circuit like opamp etc?. If easier to explain please draw it if needed.Thank you.
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