A circuit includes a detection node and a feedback node adapted to communicate with a reference circuit. A clamping transistor includes current conducting terminals and a gate coupled to the detection node. An amplifier transistor includes current conducting terminals in series with the current conducting terminals of the clamping transistor and a gate coupled to the detection node. The amplifier transistor is configured to cause a second voltage to be provided to the feedback node in response to the clamping transistor receiving a first voltage from the detection node.