Abstract: The power management unit supplies first power that is continuous power to the second sensor when the power switch is on, supplies second power that is intermittent power having a voltage lower than the first power to the second sensor when the power switch is off, and outputs rotation number information representing a rotation number of the motor rotation shaft based on the second sensor signal. The power management unit includes a comparator that operates using the second power as the power source when the power switch is off and compare the second sensor signal and the reference voltage, and a counter that detects the rotation number of the motor rotation shaft by counting the output of the comparators.

Abstract: The power control unit sets a drive interval for driving the sensor by providing power intermittently to the sensor to a first time interval when no change is detected in the sine-wave signal and the cosine-wave signal, sets to the second time interval that is shorter than the first time interval when a change in only one of the sine-wave signal and the cosine-wave signal is detected, and sets to the third time interval that is shorter than the second time interval when a change in one of the sine-wave signal and the cosine-wave signal is detected and then a change in the other is detected.

Abstract: The power control unit sets a drive interval for driving the sensor by providing power intermittently to the sensor to a first time interval when no change is detected in the sine-wave signal and the cosine-wave signal, sets to the second time interval that is shorter than the first time interval when a change in only one of the sine-wave signal and the cosine-wave signal is detected, and sets to the third time interval that is shorter than the second time interval when a change in one of the sine-wave signal and the cosine-wave signal is detected and then a change in the other is detected.

Abstract: A rotation angle detection device including: an angular position calculation unit configured to calculate angular position information representing an angular position of the motor rotation shaft based on a first sensor signal of the first sensor; an rotation number detection unit configured to detect a rotation number of the motor rotation shaft based on a second sensor signal of a second sensor and outputs rotation number information representing the rotation number; a rotation angle calculation unit configured to calculate rotation angle information indicating a rotation angle of the motor rotation shaft based on the angular position information and the rotation number information; and a power supply unit configured to stop supplying power to the first sensor, the angular position calculation unit and the rotation angle calculation unit and to supply power to the second sensor and the rotation number detection unit when the power switch is off.

Abstract: The power control unit sets a drive interval for driving the sensor by providing power intermittently to the sensor to a first time interval when no change is detected in the sine-wave signal and the cosine-wave signal, sets to the second time interval that is shorter than the first time interval when a change in only one of the sine-wave signal and the cosine-wave signal is detected, and sets to the third time interval that is shorter than the second time interval when a change in one of the sine-wave signal and the cosine-wave signal is detected and then a change in the other is detected.

Abstract: The power management unit supplies first power that is continuous power to the second sensor when the power switch is on, supplies second power that is intermittent power having a voltage lower than the first power to the second sensor when the power switch is off, and outputs rotation number information representing a rotation number of the motor rotation shaft based on the second sensor signal. The power management unit includes a comparator that operates using the second power as the power source when the power switch is off and compare the second sensor signal and the reference voltage, and a counter that detects the rotation number of the motor rotation shaft by counting the output of the comparators.

Abstract: An imaging apparatus includes: a camera head that is provided with an image pickup device that outputs an image signal; a camera control unit that is connected to the camera head with a camera cable and outputs a video signal based on the image signal; a CDS circuit that performs co-related double sampling on the image signal; a pulse generator that outputs sample pulses to the CDS circuit; a phase adjusting unit that performs phase adjustment on a clock signal and outputs the adjusted clock signal to the pulse generator; a peak search unit that searches for a peak range in the image signal being performed with the co-related double sampling by the CDS circuit; and a phase control unit that controls the phase adjustment by the phase adjusting unit based on a result of the search by the peak search unit.

Abstract: According to one embodiment, a remote head camera includes a camera control unit, and a camera head configured to be connected to the camera control unit and including an imaging device, a drive signal generator, and a format identifying unit. The drive signal generator generates a drive signal for driving the imaging device. The format identifying unit identifies a format of the imaging device based on a clock count in a synchronization period from a first synchronization pulse to a second synchronization pulse output after the first synchronization pulse. The first synchronization pulse and the second synchronization pulse constitutes a synchronization signal.

Abstract: An imaging apparatus includes: a camera head that is provided with an image pickup device that outputs an image signal; a camera control unit that is connected to the camera head with a camera cable and outputs a video signal based on the image signal; a CDS circuit that performs co-related double sampling on the image signal; a pulse generator that outputs sample pulses to the CDS circuit; a phase adjusting unit that performs phase adjustment on a clock signal and outputs the adjusted clock signal to the pulse generator; a peak search unit that searches for a peak range in the image signal being performed with the co-related double sampling by the CDS circuit; and a phase control unit that controls the phase adjustment by the phase adjusting unit based on a result of the search by the peak search unit.

Abstract: According to one embodiment, a remote head camera includes a camera control unit, and a camera head configured to be connected to the camera control unit and including an imaging device, a drive signal generator, and a format identifying unit. The drive signal generator generates a drive signal for driving the imaging device. The format identifying unit identifies a format of the imaging device based on a clock count in a synchronization period from a first synchronization pulse to a second synchronization pulse output after the first synchronization pulse. The first synchronization pulse and the second synchronization pulse constitutes a synchronization signal.

Abstract: According to one embodiment, a camera control unit constituting a head detachable camera includes plural drive signal generators generating a drive signal different by each format of an image pickup device, plural video signal generators generating a video signal different by each format of the image pickup device, and plural converters converting the video signal into an output format different by each format of the image pickup device. Besides, the camera control unit switches the drive signal generator, video signal generator, and converter to be activated in accordance with the format of the image pickup device from among the plural drive signal generators, video signal generators, and converters.

Abstract: According to one embodiment, there are provided a clipping unit configured to clip out predetermined numbers of pixels respectively in the horizontal direction and the vertical direction from first and second solid-state image sensors which are installed so as be shifted by half a pixel pitch respectively in the horizontal direction and the vertical direction, and a processing unit configured to apply pixel shift processings in the horizontal direction and the vertical direction which correspond to pixel shifts of the first and second solid-state image sensors, with respect to an output of pixels clipped out by the clipping unit.