Abstract: A time signal repeater enabling a radio correction clock to receive a relayed radio signal without regard as to the position of arrangement and without complicated trouble, including a reception circuit for receiving a standard time radio signal and correcting an internal clock to a time according to the time code included in the received radio signal and a transmission circuit for generating and transmitting time radio signals which have different intensities and include time codes based on the internal clock at a plurality of predetermined times, and a time correction system using the same.

Abstract: An electronic sound generating circuit for an electronic device having standard signal generator including a first audio frequency signal generating circuit generating a first audio frequency signal, a second audio frequency signal generating circuit generating a second audio frequency signal having a frequency which differs from said first audio frequency signal, a mixing circuit mixing said first audio frequency signal and said second audio frequency signal to provide a mixed signal, and a tone generating circuit generating an audible tone in response to said mixed signal.

Abstract: A sound generating circuit for a timepiece including a sound base signal generator, a program divider, a dividing ratio selecting counter a sound interval base signal generator and a sound producer, whereby the sounding action of frequencies which repeatedly changes at the sound intervals and cycles is performed and can produce the onomatopoetic sounds of bird chirp, insect churr and the like which feels soft and soothing for the users.