Current generating circuit and semiconductor device having the same and memory system having the same

摘要

An embodiment of the present invention provides a current generation circuit, a semiconductor including the same and a memory system including the semiconductor device capable of generating a reference current having a constant level even when a voltage is unstable. A current generation circuit includes a mirroring circuit to charge an externally applied voltage, in which a level of the charged voltage varies corresponding to changes in a voltage level of a power source, a comparison circuit to compare the charged voltage with a feedback voltage and output a result of the comparison, and a current pass switching circuit to generate a current in response to a voltage outputted from the comparison circuit.