Abstract: A converter device is provided which has a power factor improving circuit that removes effects of noise superimposed on an AC power supply and reduces higher harmonics and improves the power factor. A power factor improving circuit (103) generally includes a voltage error amplifier (8), a current error amplifier (10), a comparator (11), a triangular wave oscillator (12), an output buffer (13), and a DC power supply (PS). A power factor improving unit (102) has a photocoupler (14) for detecting an output of an AC power supply (1) and a microcomputer (15), where the output (Vp) of the photocoupler (14) is given to the MCU of the microcomputer (15). A D/A converter (17) in the microcomputer (15) gives a converter output (DAO) to the power factor improving circuit (103) and the power factor improving circuit (103) gives a reference voltage (VREF) to the D/A converter (17).

Abstract: A power supply system for a control unit of an internal combustion engine is provided which is capable of holding an engine controllable state after starting of the engine until the engine is stopped at a driver's will. A relay 8 with a self holding function is inserted in a power supply line 21a exclusively used for supplying electric power from a battery 6 to the internal combustion engine control unit and its related devices.

Abstract: Row decoders RD are provided corresponding to memory blocks, respectively. Row decoders RD each operate receiving an operating power supply voltage from a hierarchical power supply system constituted of a main power supply line and a sub power supply line. With the use of a bank activation signal ACT, the main power supply line and the sub power supply line for all the hierarchical power supply system short circuit and a voltage of the sub power supply line is recovered. Thereafter, the main power supply line and the sub power supply line are cut off for a row decoder RD of a non-selected memory block based on a block selection signal BS supplied through a decoding operation.

Abstract: A suction air measuring device comprises vortex detection means for detecting a Karman vortex signal of vortex in a suction conduit of an engine as a digital signal and storing it in a storage means at a predetermined time period and digitizing means for digitizing an output of the vortex detection means to obtain a Karman vortex pulse signal, setting or resetting the Karman vortex pulse signal when an output of the vortex detection means increases from a lower extreme thereof resetting or setting the Karman vortex signal when the output of the vortex detection means decreases from an upper extreme thereof by a predetermined value.

Abstract: An infrared ray detector includes, an infrared ray detection element farbicated in a water which is produced by growing a semiconductor responsive to infrared ray on a high resistance substrate, a metal submount provided with two lead terminals insulated from each other, to which submount the infrared ray detection element is mechanically fixed, an adiabatic vacuum vessel for containing and cooling the infrared ray detection element, to which vessel the metal submount is mechanically fixed, the infrared ray detection element and the metal submount. The metal submount and the adiabatic vacuum vessel are respectively adhered to each other by solder.