Kabushiki Kaisha Toshiba

Toshiba Electronic Devices & Storage Corporation

Koichi Notoya

Hitoshi Imai

Yasunori Tanaka

Naoki Takahashi

Masahiro Ishibashi

Kyosuke Ogawa

A semiconductor circuit has a primary circuit that causes the light emitting element to emit light in accordance with a current flowing through a control target, and that causes the light emitting element to emit light brighter when an overcurrent flows through the control target; and a secondary circuit that is electrically insulated from the primary circuit, outputs a voltage according to a light emission amount of the light emitting element, and outputs an overcurrent detection signal indicating the brighter light emission in the light emitting element.

Semiconductor circuit and semiconductor system

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

Growing community of inventors

Yokohama Kanagawa, Japan

Koichi Notoya