Abstract: An electronic device that suppresses the number of signal wires and suppresses attenuation of signal in a transmission path is provided. The electronic device includes an antenna provided on a first circuit board, an antenna provided on a second circuit board, and a dielectric waveguide provided between the antenna and the antenna. In addition, the first circuit board includes a serializer and an RF circuit that modulates the serial signal output from the serializer and outputs the signal to the antenna. The second circuit board includes an RF circuit that demodulates an RF signal input from the antenna and a deserializer that converts the serial signal output from the RF circuit to a parallel signal.

Abstract: An image information reproducing apparatus generates a video signal carrying an original image from a read signal acquired from an image information recording medium, prepares a manually-input image to be superimposed on the original image in accordance with an operational input, thereby generating a manually-input image signal, generates a mixed image signal carrying a mixed image having the manually-input image superimposed on the original image, based on the video signal and the manually-input image signal, and stores the manually-input image signal in association with address information in the recording medium of a video signal corresponding to the original image on which the manually-input image is superimposed.

Abstract: A kinetofrictional force testing apparatus has a spindle rotated by a variable speed motor. A load cell is disposed in opposition to a disk coupled to the spindle and includes a test head for the disk, a rotational frequency controlling synthesizer, and a personal computer for general control. The rotational speed of the motor is varied on the basis of clock pulses from the rotational frequency controlling synthesizer associated with the personal computer. The rotational frequency and rotational acceleration/deceleration of the disk coupled to the spindle are digitally controlled by a predetermined program set in the personal computer. The test head is supported by a leaf spring having strain gauges mounted on its lateral surfaces. Frictional forces are measured by the output of the strain gauges.