Kabushiki Kaisha Daini Seikosha

Nobuo Shimotsuma

Shojiro Komaki

A voltage regulating circuit for supplying a regulated voltage to an electronic circuit of an electronic timepiece. The voltage regulating circuit is comprised of an N-MOS and a P-MOS transistor pair connected in series with drains and gates connected together at a common junction, and a constant current source for providing a constant current through the transistor pair for developing the regulated voltage thereacross. The constant current source is comprised of a third MOS transistor connected in series with the transistor pair, and a biasing circuit for biasing the third MOS transistor to provide a constant current through the transistor pair. The voltage regulating circuit and the electronic circuit of the electronic timepiece are both integrated circuits formed on a common integrated circuit chip.

Voltage regulated electronic timepiece

An electronic timepiece comprising an oscillating circuit for producing a standard time signal, a dividing circuit for dividing the output signal of said oscillating circuit and a driving circuit. The output signal of said driving circuit is controlled by a controlling circuit cooperative with the dividing circuit for changing the division of the standard time signal.

Electronic timepiece

An electronic circuit which has a constant voltage circuit comprises a reference voltage generating circuit, a voltage controlled element receiving the signals from said reference voltage generating circuit which is composed of a plurality of MOS transistors, and a load circuit receiving said constant voltage circuit.

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Tokyo, Japan

Nobuo Shimotsuma