I have a sensor that produces 0 - 5 vdc. I would like to create a circuit to change this output so that anything below 2 volts translates to 0vdc, and so that the the sensor's range from 2 to 5vdc translates to 0 to 5 vdc. Seems like I need to start with something that subtract 2 vdc from the sensor's output (down to but not less than 0vdc), and then multiples that result times 5/3. Any thoughts on how to do that with op amps and such...?