Reference frequency control circuit
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United States of America Patent
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Mar 22, 2011
Grant Date -
Aug 26, 2010
app pub date -
Feb 24, 2009
filing date -
Feb 24, 2009
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Abstract
A reference frequency control circuit comprising: a frequency voltage converting circuit configured to receive an oscillation signal from an oscillator circuit, and output an output voltage corresponding to a frequency of the oscillation signal, the oscillator circuit being a circuit configured to oscillate at a frequency corresponding to a level of an input signal; and a control circuit configured to control a level of the input signal so that the output voltage is at a predetermined level.
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