Pumping voltage regulation circuit
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United States of America Patent
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-
Feb 11, 2003
Grant Date -
Jul 4, 2002
app pub date -
Dec 13, 2001
filing date -
Dec 18, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A pumping voltage regulation circuit adjusts a pumping voltage to maintain a preset voltage level regardless of the variation of a supply voltage. The pumping voltage regulation circuit includes a clock adjusting unit for producing a second clock signal according to a combination of a first clock signal and a first control signal or that of the first clock signal and a second control signal, a pumping voltage generating unit for producing a pumping voltage in response to the second clock signal outputted from the clock adjusting unit, a diode chain for dividing the pumping voltage and a sense amplifier for outputting the second control signal by comparing an output voltage of the diode chain with a reference voltage.
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