Oscillator circuit
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United States of America Patent
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Oct 4, 2016
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N/A
app pub date -
Sep 25, 2015
filing date -
Sep 30, 2014
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Abstract
Provided is a CR oscillator circuit that achieves a small occupied area and good oscillation frequency accuracy while having small current consumption. The CR oscillator circuit includes: a reference voltage circuit configured to switch and output a reference voltage; a first constant current source configured to charge a capacitor; a second constant current source configured to discharge the capacitor; a voltage comparator configured to compare voltages of the reference voltage circuit and the capacitor; and a logic circuit. The logic circuit is configured to switch between the reference voltage circuit and the constant current source simultaneously in response to an output signal of the voltage comparator.
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