×

Electronic watch and method of driving the same

  • US 5,798,985 A
  • Filed: 09/24/1996
  • Issued: 08/25/1998
  • Est. Priority Date: 09/29/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. An electronic watch comprising:

  • a power supply for generating electric energy by using external energy;

    a booster means comprising at least two booster circuits for sequentially repeating charging by said power supply, boosting a charge voltage and discharging said boosted charge voltage;

    a storage means for storing therein the charge discharged by said booster means;

    a clock output means connected to an output terminal of said storage means, and also connected to said power supply by way of a reverse-blocking means for preventing said stored voltage from reversely flowing to said power supply; and

    a control means for outputting a control signal for switching between charging and discharging of each of said booster circuits constituting said booster means,wherein said control means include a reference voltage generating circuit and a voltage comparator circuit, and wherein a reference voltage generated by the reference voltage generating circuit is compared with a voltage which is charged in a capacitor of a charging booster circuit of said booster means so as to output said control signal.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×