Oscillator circuit which compensates for external voltage supply, temperature and process
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United States of America Patent
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Apr 29, 2014
Grant Date -
Sep 13, 2012
app pub date -
Nov 5, 2010
filing date -
Nov 30, 2009
priority date (Note) -
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Abstract
Disclosed is an oscillator circuit which compensates for external voltage supply, temperature, and a process, includes: a reference voltage generation unit configured to generate reference voltage Vbp stabilized against a change in external voltage supply VDD and temperature; a temperature compensation unit configured to generate first reference voltage PVREF, second reference voltage IVREF, and third reference voltage RX_VREF; an internal voltage supply generation unit configured to generate internal voltage supply VPPI stabilized against the change in external voltage supply VDD and temperature by receiving the first reference voltage PVREF; a current supply unit configured to generate compensation current RX_IREF in proportion to or in inverse proportion to temperature by receiving the second reference voltage IVREF; a process compensation unit configured to perform process compensation by controlling an amount of the compensation current RX_IREF; and an oscillation signal generation unit configured to generate oscillation signals.
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