Abstract: In a closed loop control method of a linear vibration actuator which vibrates linearly and energized by a switching element driven in a PWM control method, a crest or peak point (Bc, Bp) of the back electromotive force occurring in the linear vibration actuator is detected (S14). The detected crest or peak point (Bc, Bp) is compared with a reference value (Bcr, Bpr) (S15), and adjusting the PWM duty (?) applied to the switching element and controlling the operating frequency of the linear vibration actuator to resonant frequency (S16 to S19), thereby keeping the crest or peak point (Bc, Bp) of the back electromotive force always constant.

Abstract: A gate driver for forcing a power transistor including a gate electrode insulated with oxide film into conduction or shut-off, the gate driver includes a first current source for outputting a first current value to raise an electric potential of the gate electrode for changing shut-off state of the power transistor to conductive state; and a second current source for outputting a second current value to lower the electric potential of the gate electrode for changing the conductive state of the power transistor to the shut-off state. The first current value and the second current value are assigned based on at least one kind of current-source control information. This structure allows preparing an appropriate speed of forcing the power transistor into conduction or shut-off with a small number of elements, and the gate driver can be used with ease for driving power transistors having different output sizes.

Abstract: Each connection point of three series circuits formed by connecting two MOSFETs in series between positive and negative terminals of a direct-current power source is connected to a driving coil of a motor. The MOSFET is composed of an FET main body, and a parasitic element group, and its current tolerance is a sum of maximum value of a first current flowing in the FET main body when the MOSFET is turned on, and maximum value of a second current flowing in the parasitic element group upon transition of the MOSFET from on to off state.

Abstract: An image data outputting apparatus and method form satisfactory images regardless of characteristics of an image forming apparatus by outputting copy forgery preventing image data for preventing copy-based forgery to the image forming apparatus. For example, a recording medium outputting system is constructed by connecting a LAN having a DB server managing transmission/reception of data to/from a database in the city office, and many LANs each having a terminal and a printer installed in a convenience store via a communication line and the Internet. Document data of a certificate is retrieved from the database in the city office by operating a terminal in a store, the retrieved document data is merged with copy forgery preventing image data corresponding to characteristics of a printer in the same store, and the merged data is outputted from the printer.

Abstract: A vibration linear actuating device includes a vibrating linear actuator and a driver (52) for driving actuator. Actuator includes mover having permanent magnet magnetized in a radial direction, stator having coil (2) and facing the permanent magnet, and elastic body for coupling stator to mover. The driver includes driving section having switching element (Q5) for powering coil (2), output controller (27) for controlling switching element (Q5), zero-cross detector (25) for detecting a zero-cross point of back electromotive force generated in coil (2) and having an output to be fed back to the output controller (27). In this structure, the driver powers coil (2) in one way to keep mover vibrating in corporation with elastic body.

Abstract: Each connection point of three series circuits formed by connecting two MOSFETs in series between positive and negative terminals of a direct-current power source is connected to a driving coil of a motor. The MOSFET is composed of an FET main body, and a parasitic element group, and its current tolerance is a sum of maximum value of a first current flowing in the FET main body when the MOSFET is turned on, and maximum value of a second current flowing in the parasitic element group upon transition of the MOSFET from on to off state.

Abstract: A motor controller includes a position sensing device having a position sensor that senses a magnetic pole of a motor, a driver for driving the motor, and a wiring section that feeds a power supply voltage from the driver to the position sensing device. The position sensing device is equipped with a superposed-wave transmitter coupled to a first end of the wiring section and a serial converter for converting a signal of the sensing device into a serial signal. The driver is equipped with a superposed-wave receiver coupled to a second end of the wiring section and a parallel converter for converting the serial signal into a parallel signal. The foregoing structure allows superposing the information about switching a phase-excitation for driving the motor onto the wiring section formed of a pair of cables, i.e. two cables, so that the information is transmitted.

Abstract: A vibration linear actuating device includes a vibrating linear actuator and a driver (52) for driving actuator. Actuator includes mover having permanent magnet magnetized in a radial direction, stator having coil (2) and facing the permanent magnet, and elastic body for coupling stator to mover. The driver includes driving section having switching element (Q5) for powering coil (2), output controller (27) for controlling switching element (Q5), zero-cross detector (25) for detecting a zero-cross point of back electromotive force generated in coil (2) and having an output to be fed back to the output controller (27). In this structure, the driver powers coil (2) in one way to keep mover vibrating in corporation with elastic body.

Abstract: A motor controller includes a motor-position detector, a motor driver and a power cable having a pair of electric lines (two lines) which feeds power from the driver to the detector. The detector superimposes serial information about the motor-position to the power cable via windings of a transformer or a coupling capacitor. The serial information is obtained by converting parallel information about the motor-position. The serial information superimposed travels to the driver via the power cable. The driver receives the serial information via windings of the transformer or a coupling capacitor, and converts it to parallel information. The driver drives the motor according to this parallel information. The information necessary for driving the motor is superimposed to the power cable and transmitted through the power cable, so that a number of electric lines between the detector and the driver can be minimized.

Abstract: A motor controller includes a position sensing device having a position sensor that senses a magnetic pole of a motor, a driver for driving the motor, and a wiring section that feeds a power supply voltage from the driver to the position sensing device. The position sensing device is equipped with a superposed-wave transmitter coupled to a first end of the wiring section and a serial converter for converting a signal of the sensing device into a serial signal. The driver is equipped with a superposed-wave receiver coupled to a second end of the wiring section and a parallel converter for converting the serial signal into a parallel signal. The foregoing structure allows superposing the information about switching a phase-excitation for driving the motor onto the wiring section formed of a pair of cables, i.e. two cables, so that the information is transmitted.

Abstract: A gate driver for forcing a power transistor including a gate electrode insulated with oxide film into conduction or shut-off, the gate driver includes a first current source for outputting a first current value to raise an electric potential of the gate electrode for changing shut-off state of the power transistor to conductive state; and a second current source for outputting a second current value to lower the electric potential of the gate electrode for changing the conductive state of the power transistor to the shut-off state. The first current value and the second current value are assigned based on at least one kind of current-source control information. This structure allows preparing an appropriate speed of forcing the power transistor into conduction or shut-off with a small number of elements, and the gate driver can be used with ease for driving power transistors having different output sizes.

Abstract: A motor controller includes a motor-position detector, a motor driver and a power cable having a pair of electric lines (two lines) which feeds power from the driver to the detector. The detector superimposes serial information about the motor-position to the power cable via windings of a transformer or a coupling capacitor. The serial information is obtained by converting parallel information about the motor-position. The serial information superimposed travels to the driver via the power cable. The driver receives the serial information via windings of the transformer or a coupling capacitor, and converts it to parallel information. The driver drives the motor according to this parallel information. The information necessary for driving the motor is superimposed to the power cable and transmitted through the power cable, so that a number of electric lines between the detector and the driver can be minimized.

Abstract: A method of outputting a recording medium on which forgery-inhibited data of a certificate of residence, securities, or the like which is obtained through a communication network such as a computer network and is inhibited to be forged by copying is printed directly from a printer without using a copy forgery preventing sheet. A recording medium outputting system of the invention is constructed by connecting a LAN having a DB server managing transmission/reception of data to/from a database disposed in a city office or the like, and a number of LANs each having a terminal and a printer installed in stores such as convenience stores via a communication line and the internet.

Abstract: An image data outputting apparatus and method form satisfactory images regardless of characteristics of an image forming apparatus by outputting copy forgery preventing image data for preventing copy-based forgery to the image forming apparatus. For example, a recording medium outputting system is constructed by connecting a LAN having a DB server managing transmission/reception of data to/from a database in the city office, and many LANs each having a terminal and a printer installed in a convenience store via a communication line and the Internet. Document data of a certificate is retrieved from the database in the city office by operating a terminal in a store, the retrieved document data is merged with copy forgery preventing image data corresponding to characteristics of a printer in the same store, and the merged data is outputted from the printer.

Abstract: Disclosed is a method of outputting a recording medium on which forgery-inhibited data of a certificate of residence, securities, or the like which is obtained through a communication network such as a computer network and is inhibited to be forged by copying is printed directly from a printer without using a copy forgery preventing sheet. A recording medium outputting system of the invention is constructed by connecting a LAN having a DB server managing transmission/reception of data to/from a database disposed in a city office or the like, and a number of LANs each having a terminal and a printer installed in stores such as convenience stores via a communication line and the Internet.