I am trying to design a electronic circuit which will only pass voltage between a threshold, like a dual clipper. The input is a varying DC input and the system (would) allow output only above 3.3V. Initially I tried to design a negative clipper with bias voltage but then the bias voltage powers up the output when the input voltage goes below the bias voltage, which would be detrimental as I would need to recharge the source.
Please suggest alternate approaches.
Edit 1: The source is a low impedance input ranging in 10 - 30 ohm. The load is a boost circuit which boosts the voltage to steady 5V. The voltage tolerance is not an issue because the load can withstand voltage from 2.5 V - 5.5 V. I would like the bias voltage to not be forwarded to the output, thus when the input falls below threshold, the output falls to zero.