Self-refresh device and semiconductor device including the self-refresh device

A self-refresh device is disclosed, which relates to a technology for generating a self-refresh period by reflecting refresh characteristics of an actual cell in a semiconductor device. The self-refresh device includes: a period generation unit configured to output a period control signal by compari...

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1. Verfasser: Lee Hyeng Ouk
Format: Patent
Sprache:eng
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Zusammenfassung:A self-refresh device is disclosed, which relates to a technology for generating a self-refresh period by reflecting refresh characteristics of an actual cell in a semiconductor device. The self-refresh device includes: a period generation unit configured to output a period control signal by comparing an output voltage of a dummy cell with a reference signal; a phase detection unit configured to detect a phase of the period control signal in response to an oscillation signal having a fixed period; and a refresh signal output unit configured to output a self-refresh period signal in response to the oscillation signal and an output signal of the phase detection unit.