Temperature adaptive refresh clock generator for refresh operation
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United States of America Patent
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Oct 18, 2005
Grant Date -
Jun 10, 2004
app pub date -
Dec 1, 2003
filing date -
Dec 4, 2002
priority date (Note) -
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Abstract
The present invention provides a refresh clock generator which optimally controls a period of a refresh clock signal according to temperature variation and outputs the refresh clock signal. The refresh clock generator includes a bias voltage generating unit for generating first and second bias voltages in response to a temperature variation and a clock generator for generating a refresh clock signal having a frequency which is controlled or adjusted based on the first and second bias voltages, wherein the first bias voltage is varied in proportion to the temperature variation; the second bias voltage is varied in inverse proportion to the temperature variation; and the frequency of the refresh clock signal is varied in proportion to the temperature variation.
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