Abstract: A transmitting apparatus includes a first signal outputter configured to output a first signal to a receiving apparatus via a first line; and a communicator connected to a second line that connects a receiving-side ground node and the first signal outputter with an AC connection, the receiving-side ground node being supplied with a ground potential of the receiving apparatus, and the communicator being configured to transmit a second signal from the transmitting apparatus to the receiving apparatus by causing a direct current, a magnitude of which changes based on a logic level of the second signal, to flow in the second line, or to receive the second signal from the receiving apparatus by detecting a magnitude of a direct current flowing in the second line.

Abstract: A receiving apparatus includes: a capacitance element connected to a receiving side of a transmission line through which a transmission signal is transmitted, and where a direct current flowing through the transmission line changes in accordance with a logic level of a data signal; a transistor configured to amplify a current flowing between a receiving-side node and a power supply node to which a power supply potential is supplied, where the receiving-side node is positioned between the transmission line and the capacitance element; and a data signal generator configured to generate the data signal based on the current amplified by the transistor.

Abstract: A signal transmission includes a first transmission device that includes: a first output amplifier that outputs a first output signal; and a first impedance circuit that has one or a plurality of reactance element provided between the first output amplifier and a transmission line, where impedance of the first impedance circuit corresponds to frequencies belonging to a first band, and is smaller than impedance corresponding to frequencies outside the first band; and a second transmission device that includes: a second output amplifier that outputs a second output signal; and a second impedance circuit that has one or a plurality of reactance elements provided between the second output amplifier and the transmission line, where impedance of the second impedance circuit corresponds to frequencies belonging to a second band differing from the first band, and is smaller than impedance corresponding to frequencies outside the second band.

Abstract: A signal transmission includes a first transmission device that includes: a first output amplifier that outputs a first output signal; and a first impedance circuit that has one or a plurality of reactance element provided between the first output amplifier and a transmission line, where impedance of the first impedance circuit corresponds to frequencies belonging to a first band, and is smaller than impedance corresponding to frequencies outside the first band; and a second transmission device that includes: a second output amplifier that outputs a second output signal; and a second impedance circuit that has one or a plurality of reactance elements provided between the second output amplifier and the transmission line, where impedance of the second impedance circuit corresponds to frequencies belonging to a second band differing from the first band, and is smaller than impedance corresponding to frequencies outside the second band.

Abstract: A transmitting apparatus includes a first signal outputter configured to output a first signal to a receiving apparatus via a first line; and a communicator connected to a second line that connects a receiving-side ground node and the first signal outputter with an AC connection, the receiving-side ground node being supplied with a ground potential of the receiving apparatus, and the communicator being configured to transmit a second signal from the transmitting apparatus to the receiving apparatus by causing a direct current, a magnitude of which changes based on a logic level of the second signal, to flow in the second line, or to receive the second signal from the receiving apparatus by detecting a magnitude of a direct current flowing in the second line.

Abstract: A receiving apparatus includes: a capacitance element connected to a receiving side of a transmission line through which a transmission signal is transmitted, and where a direct current flowing through the transmission line changes in accordance with a logic level of a data signal; a transistor configured to amplify a current flowing between a receiving-side node and a power supply node to which a power supply potential is supplied, where the receiving-side node is positioned between the transmission line and the capacitance element; and a data signal generator configured to generate the data signal based on the current amplified by the transistor.

Abstract: A power supply circuit includes a slave mode in which a power supply is turned on/off by an external device without any standby power supply and a master mode of turning on/off the power supply circuit in the slave mode. A power relay is provided in the power supply circuit between a power supply and a load circuit. The power supply circuit supplies a drive voltage to the power relay upon reception of a power-on command from an external device. A power supply input terminal receives the drive voltage for driving the power relay.

Abstract: A power supply circuit includes a power relay provided between a power supply and a load circuit, a control section that supplies a drive voltage to the power relay upon reception of a power-on command from an external device, a mode selecting switch that turns on/off a connection between the control section and the power supply, and a power supply input terminal that receives the drive voltage for driving the power relay from the outside.

Abstract: Individual channels, to which a sound signal inputting portion In having a pin jack with NC setting and an amplifier circuit Amp are provided respectively, are provided in parallel from a higher order to a lower order every four L/R channels, and a cascade connection configuration in which a signal terminal S of the higher order channel is connected to an NC contact of the lower order channel successively is employed. Accordingly, the signal on the higher order side can be transmitted to the lower order side, and as a result there is no need to input the common (Bus) signal apart from the signals on the individual channels and also the changeover switch can be omitted.

Abstract: A test signal generator (10) outputs a test signal which is obtained by cutting off a high-frequency component from a white noise signal. A signal switching device (18) selectively outputs either one of a positive-phase signal of the test signal and a negative-phase signal of the test signal, in response to a switching operation of the user. A selector (16) selectively outputs either one of the test signal and a musical sound signal to speaker terminals (26, 28). The test signal is reproduced while the selector (16) is connected to the test signal side. At this time, the test signal is output as it is from one channel. A signal which is obtained by selectively outputting either one of the positive-phase signal of the test signal and the negative-phase signal of the test signal is reproduced from the other channel. If, when the test signal is positive-phase, the sound is localized between the left and right loudspeakers, the connection polarities of the left and right loudspeakers is attained.

Abstract: In accordance with a kind of effect, an effect adding section (38) adds an original microphone signal with an effect signal and outputs the added signal, or outputs an effect signal in place of the original microphone signal. A mixing section (42) mixes the effect signal and the original microphone signal at a variable mixing ratio. The mixed signal is supplied to an echo signal generating circuit (20) to generate an echo signal. An output signal of the effect adding section (38) and the echo signal output from an echo adding section (40) are mixed by a mixing circuit (18). In the case in which both an effect and an echo are added such that the microphone signal and the effect signal are added and then output, the mixing section (42) reduces the mixing ratio of the effect signal, whereby the effect is prevented from being excessively increased.

Abstract: In an echo effector for imparting an echo effect to an audio signal based on values of a plurality of parameters, a memory is provided for memorizing an interrelationship among the plurality of the parameters which are mutually related to each other. A dial is actuated for independently setting one or more of the parameters to desired values. A microcomputer dependently sets the remaining parameters to appropriate values according to the desired values and the memorized interrelationship. Further, in a sound field effector operative according to a selected program for creating an effect simulative of a sound field in matching with a room situation under which the effector is installed, a program memory stores a plurality of programs which can be selected in terms of types of sound fields and types of room situations. A first switch is operated for designating a desired type of a sound field. A second switch is operated for designating a desired type of a room situation.

Abstract: In an apparatus for amplifying a sound while suppressing a howling noise, a microphone collects a sound and converts the collected sound into a corresponding input signal. An amplifier amplifies the input signal to generate the sound through a loudspeaker. A plurality of equalizers are interposed between the microphone and the amplifier, each equalizer having a variable attenuation frequency for attenuatively filtering the input signal around the attenuation frequency. Detection is conducted for detecting a plurality of noise spectrum peaks of the howling noise contained in the collected sound. Then, an adjustment is conducted adjusting respective variable attenuation frequencies of the plurality of the equalizers correspondingly to the plurality of the detected noise spectrum peaks to thereby remove the howling noise from the generated sound.

Abstract: A harmony chorus apparatus collects an original of a vocal sound performed after a main melody pattern of a song, and adds a chorus sound derived after a chorus melody pattern of the same song to the vocal sound. A memory stores a main melody data representative of the main melody pattern and a chorus melody data representative of the chorus melody pattern which is designed in harmony with the main melody pattern. A pitch difference calculator sequentially retrieves the main melody data and the chorus memory data from the memory in synchronization with progression of the song, and calculates a pitch difference between the main melody pattern and the chorus memory pattern according to the retrieved main melody data and chorus melody data. A chorus generator shifts a pitch of the collected vocal sound by the calculated pitch difference to generate the chorus sound in the form of a variation of the vocal sound.

Abstract: A howling prevention apparatus prevents a howling noise which is generated in a sound amplification system using a microphone and a loudspeaker. The howling prevention apparatus utilizes a plural number of first to n-th equalizers, which have a variable frequency response and which modulate an output of the microphone. A detector detects a frequency point at which a loop gain of the system reaches a peak while supplying a standard noise signal to the loudspeaker to produce a test sound and measuring the sound collected by the microphone through the series of the equalizers. A frequency response of the first equalizer is adjusted to suppress a noise peak at and around a frequency point detected by the detector. Then, a frequency response of the second equalizer is also adjusted to suppress a noise peak at and around another frequency point detected by the detector. Lastly, a frequency response of the n-th equalizer is adjusted by subsequently repeating the above setting procedure.

Abstract: A harmony adaptor is optionally usable as an attachment to a karaoke apparatus which has a pickup device for collecting a live singing sound and converting the same into a vocal signal, and a mixing device for mixing the vocal signal with a music signal representative of a karaoke music sound and for acoustically reproducing the live singing sound accompanied by the karaoke music sound according to the mixed ones of the vocal signal and the music signal. The harmony adaptor is detachably connectable to the pick-up device for receiving therefrom the vocal signal. The harmony adaptor generates a harmony signal which originates and separates from the received vocal signal and which represents a harmony chorus sound made consonant with the live singing sound.

Abstract: A system for positioning an automotive vehicle side body wherein slide rails for supporting a sliding conveyor for movement thereon in an automotive vehicle body assembly line is located, not on a floor of the assembly line, but at the same height as an underbody supported at a elevated location above the assembly line floor, so that an open space below the slide rails can be used for installing other necessary equipment.

Abstract: A vehicle body positioning apparatus includes a first jig for an under body, which is located and fixed on a jig surface plate provided in a vehicle body assembly equipment, second jigs for right and left side bodies, and a third jig for upper body parts which are carried by an overhead conveyor. An arched frame, is erected on the jig surface plate perpendicular to an assembly line. A positioning and supporting assembly is provided on the arched frame and the second jigs, respectively, so as to position the third jig with respect to the first and second jigs.

Abstract: A spot welding device for welding car bodies at a plurality of different positions without the need to move the car body to the welding device for each weld position. The device comprises a polyhedron shaped rotating member having a plurality of electrodes disposed on surfaces of the rotating member. The member is rotated to select a desired surface and the configuration of electrodes thereon to thereby perform a plurality of welds with the electrodes on the selected surface.

Abstract: A jig assembly for a car body including a movable jig unit having a frame with a universal configuration and removable jig members configured exclusively for a distinctive body part; and a fixed station jig unit for positioning and fixing the movable unit. The fixed unit is comprised of an elevator lifter for supporting the frame, reference pins which are provided in the elevation range of the lifter and are inserted into the frame to position the frame in the longitudinal direction, reference blocks for positioning the lower end of the frame, first clamp units for fixing the frame onto the reference blocks, and second clamp units for securing a body part to the jig members.