Semiconductor memory device`s e.g. flash memory device, oscillator, has reference voltage generator generating reference voltage which is compared with voltage, and generating reference clock based on comparison result

摘要

The oscillator has a reference voltage generator (13) generating reference voltage which flexibly shifts based on a shift in power supply voltage, where the generator is enabled based on an enable bar signal. A voltage generator (12) generates voltage based on a RC delay value. The oscillator compares reference voltage with the voltage, and generates a reference clock based on the comparison result. An independent claim is also included for a semiconductor memory device comprising an oscillator.