Oscillator circuit and memory system
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United States of America Patent
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Aug 30, 2011
Grant Date -
Aug 5, 2010
app pub date -
Dec 22, 2009
filing date -
Feb 4, 2009
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Abstract
An oscillator circuit generates a constant delay time by use of a current source and a load element to determine a frequency of a clock. The oscillator circuit includes an integrator which integrates the clock, a first comparator which compares an output voltage of the integrator with a reference voltage, and a variable current source which changes a current in accordance with the comparison result of the first comparator. The frequency is corrected in accordance with the current of the variable current source.
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