US Patent 7501852 Tolerant input circuit
Patent 7501852 was granted and assigned to Fujitsu on March, 2009 by the United States Patent and Trademark Office.
All edits
A tolerant input circuit that functions stably regardless of fabrication differences without having to adjust the threshold value of an input circuit. The tolerant input circuit includes a step-down device configured by an N-channel MOS transistor connected between an input pad and the input circuit. Voltage from a power supply is supplied to the gate of the N-channel MOS transistor in the step-down device to decrease the voltage of a high voltage signal provided to the input pad to the voltage of the power supply or lower. The signal with decreased voltage is provided to the input circuit. The tolerant input circuit includes a back gate voltage control circuit for increasing back gate voltage of the N-channel MOS transistor in the step-down device when the input pad is provided with a high voltage signal.
US Patent 07501852 Tolerant input circuit US Patent 7501852 Tolerant input circuit
US Patent 07501852 Tolerant input circuit
Find more entities like US Patent 7501852 Tolerant input circuit
