摘要:
An active down converting supplying a large current consumed when a memory array is active, and a Vpp pump for generating a boosted voltage are configured into active units as cells. A required number of active units are provided depending on the array structure and the operation conditions. A power supply circuit can be redesigned and/or rearranged within a short period for adaptation to change in internal structure for the memory array.
摘要:
An equalizing circuit includes a plurality of N-channel MOS transistors for respectively setting a data line to a predetermined precharge voltage. The H-level voltage Vddb of a control signal for turning on these N-channel MOS transistors is set to a range higher than the sum of the precharge voltage and a transistor threshold voltage. A Vddb generation circuit steps up an external power-supply voltage and sets a voltage Vddb in a range lower than a step-up voltage for activating a word line.
摘要:
An internal power supply voltage generation circuit includes a main amplifier that supplies a current from an external power supply node to an internal power supply line in accordance with the difference between a reference voltage from a reference voltage generation circuit and an internal power supply voltage on the internal power supply line. The current supply amount by the main amplifier is adjusted by a level adjust circuit, according to the difference between the external power supply voltage and the reference voltage. The internal power supply voltage generation circuit can suppress reduction in the internal power supply voltage in the vicinity of the lower limit area of the differential power supply voltage.