Abstract: Generally, the current threshold value is set as a fixed value. Therefore, even in a case where an abnormality occurs in the load and the resistance value is small, when the power supply voltage applied to the load is low, the current value is also low, and falls below the threshold value, and there is a possibility that the overcurrent is not detected. In the present invention, by providing a second detection means that detects a load abnormality by calculating the resistance value of the load from information of the power supply voltage applied to the load, in addition to a first detection means that detects an overcurrent state that indicates the load abnormality using only current value information, it is possible to detect an overcurrent indicating an abnormality of the load even when the power supply voltage applied to the load is low.

Abstract: Generally, the current threshold value is set as a fixed value. Therefore, even in a case where an abnormality occurs in the load and the resistance value is small, when the power supply voltage applied to the load is low, the current value is also low, and falls below the threshold value, and there is a possibility that the overcurrent is not detected. In the present invention, by providing a second detection means that detects a load abnormality by calculating the resistance value of the load from information of the power supply voltage applied to the load, in addition to a first detection means that detects an overcurrent state that indicates the load abnormality using only current value information, it is possible to detect an overcurrent indicating an abnormality of the load even when the power supply voltage applied to the load is low.

Abstract: Provided is an electric control unit which is configured to switch the functions of an LCC, an HSD, and an LSD depending on a load to be connected. A power-supply-side switching element 102 is provided in a path L1 between a power supply 401 and a connector terminal 301. A ground-side switching element 106 is provided in a path L2 between a ground 402 and a connector terminal 302. A freewheeling diode 105 is provided in a path L3 connected to a connection point P1 between the power-supply-side switching element 102 and the connector terminal 301 and a connection point P2 between the ground-side switching element 106 and the connector terminal 302. A switching element 104 is provided in the path L3.

Abstract: Provided is an electric control unit which is configured to switch the functions of an LCC, an HSD, and an LSD depending on a load to be connected. A power-supply-side switching element 102 is provided in a path L1 between a power supply 401 and a connector terminal 301. A ground-side switching element 106 is provided in a path L2 between a ground 402 and a connector terminal 302. A freewheeling diode 105 is provided in a path L3 connected to a connection point P1 between the power-supply-side switching element 102 and the connector terminal 301 and a connection point P2 between the ground-side switching element 106 and the connector terminal 302. A switching element 104 is provided in the path L3.

Abstract: In a time-division multiplexing wireless communication system, an antenna module has plural antenna elements. Receiver high-frequency circuit synthesizes signals from the antenna elements according to an antenna directivity having a desired beam pattern. Demodulator selects one of the received signals from wireless terminals according to the synthesized received signals, and determines transmission beam direction information for use in directing the beam in the selected direction. Weighting circuit generates weight coefficients for setting of the beam patterns and transmission beam directions according to the transmission beam direction information, and produces transmission time slots according to a table listing the relations of the transmission beam directions and the time slots for use in the beam radiation in those directions.

Abstract: The present invention is directed to a TDMA communication system which is adapted to different communication environments or prepares different communication environments and allows each mobile station to be set for working in any one of the different communication environments. The communication system commonly uses a TDMA format that has a fixed frame-length and a constant number of bits for each of the slots composing the frame. The communication environments have prepared respective sets of communication conditions, each set including a transmission power, a modulating method, the number of multiplexed signals, error-correction, an antenna gain, a frequency hopping value and a diversity value. At each mobile station and each base station, one of plural sets of communication conditions for respective environments is selected to establish communication with each other under the selected environment.

Abstract: In a time-division multiplexing wireless communication system, an antenna module has plural antenna elements. Receiver high-frequency circuit synthesizes signals from the antenna elements according to an antenna directivity having a desired beam pattern. Demodulator selects one of the received signals from wireless terminals according to the synthesized received signals, and determines transmission beam direction information for use in directing the beam in the selected direction. Weighting circuit generates weight coefficients for setting of the beam patterns and transmission beam directions according to the transmission beam direction information, and produces transmission time slots according to a table listing the relations of the transmission beam directions and the time slots for use in the beam radiation in those directions.

Abstract: A magnetic recording/playback apparatus for recording information to a magnetic tape and playing back the information from the magnetic tape, includes first and second recording heads which are provided on a rotary cylinder and alternately record information to the magnetic tape. First and second playback heads are provided on the rotary cylinder at predetermined positions relative to the first and second recording heads, and alternately play back the information from the magnetic tape. A crosstalk canceling switch device cancels crosstalk at outputs of the first and second playback heads when the apparatus is run in a read-after-write mode, the crosstalk canceling switch device being set in a closed position during the read-and-write mode and interconnecting the output of the first playback head and the output of the second playback head.

Abstract: A ventilator includes a ventilator fan and a sensor which detects a human body without contact. When a user performs the specific action, a comparator compares the action with a pattern stored in a memory. If the action matches the pattern, a controller controls the operation of the ventilator fan.

Abstract: An optical tracking control apparatus comprises a differential amplifier for differentially amplifying signals respectively reproduced from two mutually adjacent track turns of a guide track on both sides of an intermediate part in which an information signal is recorded and reproduced on and from a disc, a zero crossing detector for detecting a zero crossing of an output signal of the differential amplifier and for producing a switching pulse signal, and a polarity inverting circuit responsive to the switching pulse signal for alternately inverting the polarity of a crosstalk component reproduced from the two mutually adjacent track turns of the guide track as crosstalk for every one-half period of the switching pulse signal. An output signal of the polarity inverting circuit is used as a tracking error signal for controlling the tracking of the light beam.

Abstract: In an automatic tracking system for a magnetic recording and reproducing apparatus wherein tracking is controlled so as to increase an amplitude of a reproduced signal which is delivered from a rotary head for reproducing a track recorded by a helical scan system, the amplitudes of the reproduced signal are detected at a plurality of points of time within one rotational cycle of the rotary head, and the tracking is controlled so as to increase a minimum value among the detected values at the plurality of points of time.