Abstract: A digital waveform generating circuit having a DC voltage as an input and generating a sinusoidal digital signal, an active filter extracting low-frequency components from the sinusoidal digital signal generated in the digital waveform generating circuit, and a high-voltage control circuit generating a high-voltage drive signal using the sinusoidal digital signal after passing through the active filter are provided. A smooth waveform without steep voltage changes is generated.

Abstract: A motor driving circuit comprising: a synchronous rectification driving circuit to carry out synchronous rectification, to energize a driving coil connected between a first connection point at which a first source and first sink side transistors are connected in series and a second connection point at which a second source and second sink side transistors are connected in series; a backflow detecting resistor connected to electrodes of the first and second sink side transistors, the electrodes being on an opposite side of the first and second sink side transistors to the first and second connection points; a backflow detecting comparator to output a comparison signal indicating a result of comparison of voltage between a first and second terminals of the backflow detecting resistor, and a backflow prevention circuit to prohibit the synchronous rectification when the comparison signal indicates that the second terminal is higher in voltage than the first terminal.

Abstract: A portable information processor (10) includes a storage unit (11) that stores information; a connecting unit (12) that connects to one of the device (1 (or 2)); an information acquiring unit (13) that acquires information from the connected device (1 (or 2)); an operation information generating unit (14) supplied with a driving power from a power source of the connected device (1 (or 2)) and generating operation information relating to the predetermined operation executable by the connected device (1 (or 2)) based on device identification information and the acquired information acquired by the information acquiring unit (13), and the information stored in the storage unit (11); and a control unit (15) that controls the connected device (1 (or 2)) based on the operation information generated by the operation information generating unit (14).

Abstract: A portable information processor (10) includes a storage unit (11) that stores information; a connecting unit (12) that connects to one of the device (1 (or 2)); an information acquiring unit (13) that acquires information from the connected device (1 (or 2)); an operation information generating unit (14) supplied with a driving power from a power source of the connected device (1 (or 2)) and generating operation information relating to the predetermined operation executable by the connected device (1 (or 2)) based on device identification information and the acquired information acquired by the information acquiring unit (13), and the information stored in the storage unit (11); and a control unit (15) that controls the connected device (1 (or 2)) based on the operation information generated by the operation information generating unit (14).

Abstract: A portable information processor includes a storage unit that stores information; a connecting unit that connects to one of the device; an information acquiring unit that acquires information from the connected device; an operation information generating unit supplied with a driving power from a power source of the connected device and generating operation information relating to the predetermined operation executable by the connected device based on device identification information and the acquired information acquired by the information acquiring unit, and the information stored in the storage unit; and a control unit that controls the connected device based on the operation information generated by the operation information generating unit.

Abstract: At the start of traveling of a mobile object, a central processing unit calculates a route to a target place and an estimated time of arrival at the target place. After the start of traveling, when the mobile object has come to within a predetermined distance of the target place, a distance calculating unit in the central processing unit detects the distance, and a calling unit in the central processing unit automatically makes a call to a destination set in association with the target place through an external communication network. In this manner, a person who waits at the target place can be notified of the estimated time of arrival at an appropriate time.

Abstract: A storing unit stores a plurality of music data and music data relating information that relates a keyword to each of the music data, a reproducing unit reproduces the music data stored in the storing unit, a searching unit searches the storing unit for music data based on the music data relating information when a user inputs a keyword, an extracting unit extracts characteristics of the music data while the music data are reproduced by the reproducing unit, and a preparing unit prepares a keyword using the characteristics of the music data extracted by the extracting unit, relates the prepared keywords to the music data, and causes the storing unit to store the related data.

Abstract: An information reproducing apparatus reproduces music information with an information reproducing portion. And it refers to an output voice, an output video, a voice level and so on during reproduction of the music information, and specifies a starting time and an ending time of the arbitrary phrase such as a refrain on a touch panel with a reproducing section specifying portion. And it generates a phrase information file indicating the phrase (reproducing section) consisting of the starting time and the ending time of the phrase with a reproducing section information generating portion. In the case where the phrase information file and the music information thereof are extracted to reproduce only a phrase portion or the entire music information, it is also possible to reproduce it by having only a sound quality of the phrase portion changed by a sound quality changing portion.

Abstract: A disk player which is capable of attaining a higher speed in its start-up for sound reproduction, in which at the time of the reproduction of a disk, the pickup moves to the starting position of the reproduced side for the disk to be reproduced after the specified side of the disk is determined when the disk number, the disk size, and the music piece number are specified. Even in case the side B of a disk has been specified, the present invention makes it possible for a disk player promptly to perform the start-up operation of each disk. Even in case any of CDs and LDs different in type is stored, the present invention enables a disk player promptly to perform the start-up operation for such a disk.

Abstract: In a stereo sound digital recording system in which a plurality of tunes or programs are sequentially and digitally recorded on a magnetic tape, the left and right analog input signals are combined and converted to a digital signal. The analog input signals are also applied to a detector which detects the head of the program or tune and which causes to be generated a start identification sub-code signal which is automatically added to the digital signal, before the modulation thereof, and which is recorded on the tape for about nine seconds in the non-sound portion preceding the tune or program. A second sub-code signal, in the form of a program number signal, may also be added to the digital signal, simultaneously with the program start identification sub-code signal, to provide recorded numbers respectively identifying programs which are sequentially recorded on the tape.

Abstract: In a signal reproducing device such as an R-DAT video tape recorder, a digital signal recorded on the recording medium is reproduced by the magnetic head, stored in a memory, processed by a processing circuit, and converted into an analog signal by a D/A converter, and a detector detects whether or not the reproduction signal outputted by the head is present so that, according to the output of the detector, a muting circuit mutes the digital-to-analog converted signal and a driver suspends the operation of a level meter adapted to display the level of the digital signal, whereby the production of noise signals and the abnormal display of signal levels are prevented.

Abstract: A signal recording/reproducing apparatus having both bar-type and numeric signal-level displaying units which can be easily read. The apparatus includes a sample-and-hold circuit for sampling and holding an input signal at a first predetermined rate, a first display unit for displaying in bar form the sample values sampled by the sample-and-hold circuit, a data holding circuit for sampling and holding the sample values periodically at a second predetermined rate, and a second display unit for numerically displaying the sample values selected by the data holding circuit. The bar code display can change at a rapid rate to dynamically follow the input signal, while the numeric display changes at a slower rate so as to allow the user sufficient time to comprehend the numerically displayed value.

Abstract: A digital audio player in which the pieces of music are played according to a program. The program is selected so that the total playing time does not exceed a set period of time. The selection is performed by reading playing times from a disk on which are recorded both the pieces of music and their separate playing times.