Canon Kabushiki Kaisha

Satoru Mikajiri

Shinji Nakamura

Koji Kawamura

A photoelectric convertor is provided. The convertor includes first and second pixels each including an avalanche photodiode and a counter, and a processor. The first and second pixels repeat a detection operation including exposure intervals in which the counter counts a number of times that an avalanche breakdown occurred in the photodiode and holding intervals in which a count value counted in the exposure interval is held in the counter. After a predetermined time has elapsed from the start of a first exposure interval of the first pixel, a second exposure interval of the second pixel is started. The processor outputs a difference value between a first count value counted in the first exposure interval and held in the counter in a first holding interval that continues from the first exposure interval and a second count value counted in the second exposure interval.

Photoelectric conversion apparatus, device, and moving body

A motor control apparatus that controls a first motor and a second motor that are synchronized includes a first motor control unit configured to control a driving voltage of the first motor based on the torque current instruction value, which is output based on a torque current of the first motor for the first motor, and a second motor control unit configured to control a driving voltage of the second motor based on the torque current instruction value, which is output based on a torque current of the second motor for the second motor, wherein the first torque correction unit or the second torque correction unit corrects the torque current instruction value for the first motor or the toque current instruction value for the second motor based on the torque current of the first motor and the torque current of the second motor.

Motor control apparatus and control method for motor control apparatus

A motor control apparatus includes a motor, a motor driver to drive the motor, a motor current detection unit, a motor state estimation unit, a motor control unit, and first and second abnormality detection units. The motor current detection unit detects a current value of the motor. The motor state estimation unit estimates a state of the motor based on a voltage applied to the motor and the detected current value. The motor control unit applies a driving voltage of first driving corresponding to the estimated state of the motor or apply a driving voltage of second driving, which does not use the estimated motor state, to the motor driver. The first abnormality detection unit detects a rotation abnormality of the motor based on the estimated motor state. The second abnormality detection unit detects the rotation abnormality of the motor based on the detected current value of the motor.

Motor control apparatus and control method of the same

A P-channel type MOSFET and an N-channel type MOSFET formed by a CMOS process are connected in series. A high-voltage signal and a low-voltage signal are applied to the drain of one of transistors. Prescribed bias voltage is applied to both gates in order that only a low-voltage signal can pass through both conduction paths.

Growing community of inventors

Kanagawa, Japan

Satoru Mikajiri