Patent ID: 8710939
Filing Date: 2014-04-29
Classification: H03K,H03L

Abstract:
1. An oscillator circuit which compensates for external voltage supply, temperature, and a process, comprising: 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 that are each compensated to increase or decrease according to the change in temperature by receiving the reference voltage Vbp; 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.