Abstract: Degradation of the efficiency of data transmission using a radio wave is to be suppressed. A communication circuit transmits heart beat information detected by electrodes and to a master apparatus through an antenna using a radio wave. An inductor provided between the electrodes and and an input section of the communication circuit suppresses input of the radio wave output by the antenna to the communication circuit through the electrode and waste of the same.

Abstract: A stopwatch has a measuring section for measuring a primary physical quantity, a memory section for previously storing as a target value the value of the primary physical quantity at a point where a time is to be recorded, and recording sections for recording a measured value of time at a time point when the value measured by the measuring section becomes equal to the target value, after initiation of measurement of time. The target value is, for example, a value actually recorded before initiation of measurement of time by the measuring section at the point where time is to be recorded.

Abstract: A stopwatch has a measuring section for measuring a primary physical quantity, a memory section for previously storing as a target value the value of the primary physical quantity at a point where a time is to be recorded, and recording sections for recording a measured value of time at a time point when the value measured by the measuring section becomes equal to the target value, after initiation of measurement of time. The target value is, for example, a value actually recorded before initiation of measurement of time by the measuring section at the point where time is to be recorded.

Abstract: A wave motor driving circuit for driving a moving body frictionally by vibrations generated by applying electric signals to electromechanical transducer stuck on an elastic body, the wave motor driving circuit comprises: a driving-wave forming circuit for forming driving waveforms to drive to wave motor; a position sensor for detecting rotational position of the moving body of the wave motor; a position detector circuit for outputting position information from the position sensor in accordance with a request signal from a detection control circuit; and the detection control circuit for generating the request signal having means for altering an interval of generating the request signal in response to position information of the position detector circuit.

Abstract: A world timepiece having means for controlling the time correction of the fundamental time that the fundamental time is interlocked to the time of a region having time difference when the correction amount is shorter than a time-differential unit time (thirty minutes or one hour), and is not interlocked when the correction amount is equal to the multiple of the time-differential unit time.