US 11,755,045 B1
Internal voltage generation circuit
Jin Hoon Hyun, Icheon-si (KR); and Chang Hyun Lee, Icheon-si (KR)
Assigned to SK hynix Inc., Icheon-si (KR)
Filed by SK hynix Inc., Icheon-si (KR)
Filed on Aug. 5, 2022, as Appl. No. 17/882,256.
Claims priority of application No. 10-2022-0045953 (KR), filed on Apr. 13, 2022.
Int. Cl. G05F 1/46 (2006.01); G05F 1/595 (2006.01)
CPC G05F 1/465 (2013.01) [G05F 1/595 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An internal voltage generation circuit comprising:
a shifting source voltage generation circuit configured to generate a shifting source voltage having a voltage level that falls as a voltage level of a power supply voltage rises during a period when the power supply voltage is lower than a preset voltage level; and
an internal voltage regulator configured to generate a driving signal through a level shifting operation that is performed according to the shifting source voltage received when driving an internal voltage and configured to drive the internal voltage based on the driving signal,
wherein the shifting source voltage generation circuit comprises:
a detection reference voltage generation circuit configured to generate a detection reference voltage based on the power supply voltage, a first reference voltage, and a second reference voltage; and
a shifting source voltage regulator configured to generate the shifting source voltage based on the detection reference voltage and the shifting source voltage.