Voltage regulated electronic timepiece

Claim 1

In an electronic timepiece having an electronic circuit, a voltage regulating circuit for supplying a regulated voltage to said electronic circuit, said voltage regulating circuit comprising: an N-MOS and a P-MOS transistor pair each having a respective gate, source and drain and connected in series with their respective drains and gates connected together at a common junction; and constant current source means for providing a constant current through said transistor pair for developing the regulated voltage thereacross in response to the constant current flowing therethrough; wherein said constant current source means is comprised of a third MOS transistor connected in series with said transistor pair, and biasing means for biasing said third MOS transistor to provide a constant current through said transistor pair; and wherein said biasing means is comprised of a fourth MOS transistor having a gate, a source and a drain, wherein the source of said fourth MOS transistor is connected to said third MOS transistor opposite said transistor pair, and wherein the gate and drain of said fourth MOS transistor are connected together, a pair of diodes connected in series, wherein a first of said diodes is connected to the gate and drain of said fourth MOS transistor and wherein a connection between said diodes is connected to the gate of said third MOS transistor, and means connecting a second of said diodes to a connection between said transistor pair and said third MOS transistor.