Internal voltage generator and contactless IC card including the same

摘要

A voltage generator of a contactless integrated circuit (IC) card includes a regulator configured to generate a first internal voltage based on an input voltage and a first reference voltage, the input voltage being received through an antenna of the contactless IC card. The voltage generator includes an internal voltage generator configured to generate a second internal voltage, the second internal voltage being used to operate an internal circuit of the contactless IC card. The voltage generator includes a reference voltage generator configured to generate a second reference voltage based on the first internal voltage, the second reference voltage being generated without regard to a fluctuation component of the first internal voltage. The voltage generator includes a switching unit configured to provide one of the first and second internal voltages as the first reference voltage in response to first and second switching control signals.

主权项

1. A voltage generator of a contactless integrated circuit (IC) card, the voltage generator comprising:
a regulator configured to generate a first internal voltage based on an input voltage and a first reference voltage, the input voltage being received through an antenna of the contactless IC card; an internal voltage generator configured to generate a second internal voltage based on first internal voltage, the second internal voltage being used to operate an internal circuit of the contactless IC card; a reference voltage generator configured to generate a second reference voltage based on the first internal voltage, the second reference voltage being generated without regard to a fluctuation component of the first internal voltage; and a switching unit, connected to the regulator, the internal voltage generator, and the reference voltage generator, configured to provide one of the first internal voltage and the second reference voltage as the first reference voltage in response to first and second switching control signals, the first and second switching control signals indicating an operation mode of the internal circuit.