Other

Mitsubishi Denki Kabushiki Kaisha

Mitsue Takahashi

Tadaaki Yamauchi

Hiroaki Tanizaki

Mitsuya Kinoshita

A read amplifier circuit includes an equalize start circuit. Based on a preamp enable signal PAE and an equalize signal IOEQ, the equalize start circuit generates an equalize start signal EQ for starting equalization at the timing when the preamp enable signal PAE is activated. Simultaneously with activation of a preamplifier by the preamp enable signal PAE, a pair of read lines GIOR and /GIOR is cut off from the preamplifier, and a P channel MOS transistor starts equalization of the pair of read lines GIOR and /GIOR. In this way, it is possible to start equalization of the paired read lines at the same time that the output signal is supplied to the preamplifier.

Read amplifier circuit for high-speed reading and semiconductor memory device employing the read amplifier circuit

A voltage generation circuit includes a voltage comparing circuit to compare a reference voltage signal Vi and an internal power supply voltage Vcc and a current supply transistor to supply current based on the output voltage of the voltage comparing circuit and maintain Vcc. The voltage generation circuit also includes a reference voltage signal generation circuit which responds to a control signal ACT activated for a prescribed time period prior to the operation timing of a load and sets Vi=Vref when control signal ACT is inactive and Vi=Vref+.DELTA.V when control signal ACT is active.

Growing community of inventors

Hyogo, Japan

Mitsue Takahashi