Semiconductor device

Abstract

Abstract PURPOSE:To reduce the transient current at the charge/discharge of a load by using a current mirror circuit controlled by an input pluse and driving the load by constant current corresponding to a predetermined constant current source in the circuit. CONSTITUTION:When an input pulse phi is applied to an AND in case of the output voltage V0 of a driving circuit DRV lower than the internal power supply VCL and the output of a comparator at a high voltage, a transistor(TR) Q2 in TRs Q1, Q2 constituting an inverter is turned on and the TR Q1 is turned off. Thus, a current mirror circuit is formed between a TR Q3, a constant current source (i/n) and an output drive TR QD and a constant current (i) flows to a common line Cl of a sense amplifier to charge the data line. In this case, when the current flowing to the common line Cl is increased and the voltage V0 exceeds the VCL, the output of the comparator goes to a low voltage, the output of the AND goes to a low voltage, the TR Q1 is turned on, the TRs Q2, QD are turned off, the data lines D0, D0' are charged without increasing the transient current.

Inventors

• 👤 Ryoichi Hori
• 👤 Kiyoo Ito
• 👤 Goro Kitsukawa
• 👤 Yoshiki Kawajiri
• 👤 Takao Watabe
• 👤 Takayuki Kawahara

Bibliographic Details