Abstract: An air conditioner includes an outdoor device and an indoor device. The outdoor device includes an outdoor control unit that is operated at the voltage of a smoothing capacitor; a power-supply switching relay to which a signal line is connected; an inrush-current preventing-relay drive unit that is operated when single-phase AC power is supplied between a power-signal common line and the signal line via an outdoor activation relay in the indoor device and the power-supply switching relay; a first inrush-current preventing relay that is connected in parallel with a power supply relay and is controlled by the inrush-current preventing-relay drive unit; and a second inrush-current preventing relay that is connected in parallel with the first inrush-current preventing relay and is controlled by the outdoor control unit. The outdoor control unit closes the second inrush-current preventing relay when the external power supply is interrupted.

Abstract: An air conditioner includes an outdoor device and an indoor device. The outdoor device includes an outdoor control unit that is operated at the voltage of a smoothing capacitor; a power-supply switching relay to which a signal line is connected; an inrush-current preventing-relay drive unit that is operated when single-phase AC power is supplied between a power-signal common line and the signal line via an outdoor activation relay in the indoor device and the power-supply switching relay; a first inrush-current preventing relay that is connected in parallel with a power supply relay and is controlled by the inrush-current preventing-relay drive unit; and a second inrush-current preventing relay that is connected in parallel with the first inrush-current preventing relay and is controlled by the outdoor control unit. The outdoor control unit closes the second inrush-current preventing relay when the external power supply is interrupted.

Abstract: An optical transmitter includes: a data generating unit configured to generate a plurality of modulating signals; a driver configured to amplify the plurality of modulating signals generated by the data generating unit; a phase shifter configured to control a phase of at least one signal among the plurality of modulating signals to be input to the driver; a plurality of optical modulators connected in series to each other, and configured to modulate an optical signal on a basis of each of the modulating signals amplified by the driver; an optical coupler configured to branch the optical signal modulated by the optical modulator arranged at a last stage in the series; a photodiode configured to detect the optical signal branched by the optical coupler and convert the optical signal into an electric signal; and a phase control unit configured to control an amount of phase control of the phase shifter to maximize an intensity of the electric signal converted by the photodiode.

Abstract: An optical transmission apparatus in which, even if a change is made in the bit rate of modulation signals that are inputted to a plurality of optical modulating units, the modulation signals do not suffer from phase shifting, thereby enabling achieving synchronous modulation in the plurality of optical modulating units and enabling achieving a high optical signal quality. The optical transmission apparatus includes: a plurality of optical modulating units that modulate light on the basis of modulation signals; and a delay amount control unit that, based on bit rate information indicating a bit rate of the modulation signals, controls delay amounts of the modulation signals to be inputted to the plurality of optical modulating units, such that the light is modulated in a synchronous manner in the plurality of optical modulating units.

Abstract: A circuit board connection structure comprises: first and second circuit boards; a connector having first and second insertion openings receiving the first and second circuit boards, respectively, the first and second insertion openings being opposite each other. First and second connection pins are located on inner walls of the first and second insertion openings, respectively. The first and second connection pins are connected to each other in the connector. First and second patterned conductors connectable to the first and second connection pins are respectively located on the first and second circuit boards and connected to the first and second connection pins when inserted in the first and second insertion openings. The transmission path from the first connection pin to the second connection pin is a characteristic-impedance-matched coplanar line.

Abstract: A circuit board connection structure comprises: first and second circuit boards; a connector having first and second insertion openings receiving the first and second circuit boards, respectively, the first and second insertion openings being opposite each other. First and second connection pins are located on inner walls of the first and second insertion openings, respectively. The first and second connection pins are connected to each other in the connector. First and second patterned conductors connectable to the first and second connection pins are respectively located on the first and second circuit boards and connected to the first and second connection pins when inserted in the first and second insertion openings. The transmission path from the first connection pin to the second connection pin is a characteristic-impedance-matched coplanar line.

Abstract: The oscillation type inertial force sensor includes an oscillator arranged to detect an inertial force, an oscillation circuit unit arranged to drive the oscillator, and a signal processing circuit unit arranged to generate a signal according to the magnitude of the inertial force on the basis of a detection output of the oscillator, and further includes a holding arranged to hold a processed signal in the signal processing circuit unit at a predetermined potential during a period immediately after power-on until operation of the oscillation circuit unit becomes stable in response to power-on.

Abstract: An optical receiver includes a soft-decision deciding unit (7) for deciding an electric received signal according to a plurality of decision levels to output a multivalued decision signal, a demultiplexing unit (5) for serial-to-parallel converting the multivalued decision signal to output a multivalued parallel signal, a soft-decision error correction decoding unit (8) for correcting the multivalued parallel signal based on reliability information to output an error-corrected parallel received signal and decision results indicating the decision of the electric received signal according to the plurality of decision levels, a probability density distribution estimation unit (9) for estimating probability density distributions based on distributions of the decision results, and a decision level control unit (10) for controlling the plurality of decision levels based on the probability density distributions, thereby improving the transmission quality.

Abstract: The oscillation type inertial force sensor includes an oscillator arranged to detect an inertial force, an oscillation circuit unit arranged to drive the oscillator, and a signal processing circuit unit arranged to generate a signal according to the magnitude of the inertial force on the basis of a detection output of the oscillator, and further includes a holding arranged to hold a processed signal in the signal processing circuit unit at a predetermined potential during a period immediately after power-on until operation of the oscillation circuit unit becomes stable in response to power-on.

Abstract: To make it easier to visually check entries in documents such as multipage business forms, form data is gathered in a file containing a plurality of forms. The form data is read, and then a form on the first page is displayed in a window. Under control of an operator, an item such as an entry on the form to be checked on the first page is displayed with scrolling, and its display area is fixed and stored. When the operator initiates the display of a form on the second page, the window displays the same area as the display area of the form on the first page. It is also possible to display an item to be checked in a central portion of the window or to search a plurality of pages for an item to be checked.

Abstract: An optical receiver includes a soft-decision deciding means (7) for deciding an electric received signal according to a plurality of decision levels so as to output a multivalued decision signal, a demultiplexing means (5) for serial-to-parallel converting the multivalued decision signal so as to output a multivalued parallel signal, a soft-decision error correction decoding means (8) for making an error correction to the multivalued parallel signal based on reliability information so as to output an error-corrected parallel received signal and decision results indicating the decision of the electric received signal according to the plurality of decision levels, a probability density distribution estimation means (9) for estimating probability density distributions based on distributions of the decision results indicating the decision of the electric received signal according to the plurality of decision levels, and a decision level control means (10) for controlling the plurality of decision levels in the so