Patent Number: 6,337,827

Title: Voltage-dropping power unit for semiconductor memory device

Abstract: A voltage dropping power unit is provided which is capable of reducingpower consumption in the voltage dropping power unit while a semiconductormemory device is placed in a quiescent state. The voltage dropping powerunit is provided with a voltage control circuit to supply a droppedvoltage controlled depending on a control voltage to the semiconductormemory device, a reference circuit to generate a reference voltage used toproduce a control voltage and a differential circuit to make the droppedvoltage equal to the reference voltage irrespective of a level of avoltage output from the voltage control circuit. The reference circuit hasa voltage dividing resistor used to produce a reference voltage and aswitching device used to form a short-circuit across the voltage dividingresistor.

Inventors: Nakatake; Yoshihiro (Miyazaki, JP), Mitoma; Tetsuya (Miyazaki, JP)


International Classification: G11C 5/14 (20060101); G11C 007/00 ()

Expiration Date: 01/08/2014