Abstract: A separator assembly for a fuel cell and a fuel cell stack including the same, is uniformly capable of forming a surface pressure of a region where a reaction gas flows when a stack is stacked by adjusting a height and shape of a gasket line for each region in which the reaction gas flows.

Abstract: A smart card with improved power stability is provided.

Abstract: A smart card with improved power stability is provided.

Abstract: A voltage regulator includes a voltage converter is configured to generate an output power supply voltage based on an input power supply voltage and an input reference voltage and provide the output power supply voltage to an external functional circuit, the voltage converter including an output terminal configured to output the output power supply voltage; and a sinker connected to the output terminal, the sinker configured to generate a sink current in response to a sink enable signal while the external functional circuit is not driven and configured to block generation of the sink current in response to an operating enable signal while the external functional circuit is driven, wherein the sink current corresponds to a load current that is to be consumed while the external functional circuit is driven.

Abstract: A reception circuit of an NFC card, includes, an input circuit, a reference voltage generator, a comparison circuit and a reference voltage controller. The input circuit receives a wireless signal including pauses and generates an envelope voltage signal. The reference voltage generator generates a detection reference voltage and a selection reference voltage based on the envelope voltage signal and a voltage selection signal. The selection reference voltage varies depending on a minimum voltage level of the pauses. The comparison circuit generates a pause detection signal and a synchronization signal by comparing the envelope voltage signal with the detection reference voltage the selection reference voltage, respectively. The reference voltage controller adjusts a control value of the voltage selection signal based on the pause detection signal and the synchronization signal such that the selection reference voltage is changed depending on the control value of the voltage selection signal.

Abstract: A reception circuit of an NFC card, includes, an input circuit, a reference voltage generator, a comparison circuit and a reference voltage controller. The input circuit receives a wireless signal including pauses and generates an envelope voltage signal. The reference voltage generator generates a detection reference voltage and a selection reference voltage based on the envelope voltage signal and a voltage selection signal. The selection reference voltage varies depending on a minimum voltage level of the pauses. The comparison circuit generates a pause detection signal and a synchronization signal by comparing the envelope voltage signal with the detection reference voltage the selection reference voltage, respectively. The reference voltage controller adjusts a control value of the voltage selection signal based on the pause detection signal and the synchronization signal such that the selection reference voltage is changed depending on the control value of the voltage selection signal.

Abstract: A voltage regulator includes a voltage converter is configured to generate an output power supply voltage based on an input power supply voltage and an input reference voltage and provide the output power supply voltage to an external functional circuit, the voltage converter including an output terminal configured to output the output power supply voltage; and a sinker connected to the output terminal, the sinker configured to generate a sink current in response to a sink enable signal while the external functional circuit is not driven and configured to block generation of the sink current in response to an operating enable signal while the external functional circuit is driven, wherein the sink current corresponds to a load current that is to be consumed while the external functional circuit is driven.