Patent ID: 8944334
Filing Date: 2015-02-03
Classification: G05F,G06K

Abstract:
1. An internal voltage generating circuit configured to generate and output a first internal voltage in a contactless mode and to generate and output a second internal voltage in a contact mode, the internal voltage generating circuit comprising: a first voltage application unit configured to apply a first voltage that is higher in the contactless mode than in the contact mode; a second voltage application unit configured to apply a second voltage that is higher in the contact mode than in the contactless mode; a controller configured to generate a bulk voltage, a first control signal, and a second control signal based on the first and second voltages; a first regulator configured to be enabled or disabled according to the first control signal, wherein the first regulator is configured to generate and output the first internal voltage based on the bulk voltage, the first voltage, and a first reference voltage; and a second regulator configured to be enabled or disabled according to the second control signal, wherein the second regulator is configured to generate and output the second internal voltage based on the bulk voltage, the second voltage, and a second reference voltage, wherein the first regulator comprises; wherein the first switch unit further comprises a forth switch configured to control the bulk voltage to be applied or not to be applied to the gates of the first and second PMOS transistors according to the first control signal.