Kabushiki Kaisha Toshiba

Kyosuke Ogawa

Hiroaki Suzuki

Yasunori Tanaka

Naoki Takahashi

Kaoru Hama

Toshiaki Douzaka

Koichi Notoya

Masahiro Ishibashi

A charge pump circuit includes a capacitor, a first switch between the capacitor and a power supply terminal, a second switch between the capacitor and an output terminal, a third switch between the output terminal and the capacitor, a fourth switch between the capacitor and a ground terminal, and a control unit configured to generate control signals for the switches. The control signals include first signals generated during a first period that cause first and third switches to be in an ON state and second and fourth switches to be in an OFF state, second signals generated during a second period that cause first and third switches to be in an OFF state and second and fourth switches to be in an ON state, and third signals generated between the first and second periods, that cause the ON/OFF state of each of the switches to be switched at different times.

Charge pump circuit and step-down regulator circuit

A photo-mask that includes a first light shielding region which is narrow and elongated, and a second light shielding region which is wider and more elongated than the first light shielding region and is away from the first light shielding region. A phase shifter part and a non-phase shifter part are provided adjacently to both sides of the first light shielding region. Two phase shifter parts or two non-phase shifter parts are respectively provided adjacently to both sides of the second light shielding part.

Photo-mask having phase and non-phase shifter parts for patterning an insulated gate transistor

Growing community of inventors

Kawasaki Kanagawa, Japan

Kyosuke Ogawa