The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 27, 2001
Filed:
Mar. 05, 1998
Konrad Schafroth, Bern, CH;
Conseils et Manufactures VLG SA, Neuchatel, CH;
Abstract
The electronic circuit allows the control or regulation of the speed of rotation of a microgenerator (,) in a watch movement. The electronic circuit includes two inputs (G−, G+) connected to said microgenerator, a quartz oscillator (,), an energy-dissipation circuit (,) for braking said microgenerator, energy dissipation control means (,) for controlling the energy dissipation of the energy-dissipation circuit as a function of the frequency difference between the signal coming from the quartz oscillator and the signal coming from said microgenerator, and a rectifier and voltage-transformer (,) for rectifying and multiplying the signal coming from said microgenerator, with at least one capacitor (C,, C,, C,) charged by said microgenerator via at least one switch (,). The momentary energy dissipation of the braking circuit can further be reduced when the capacitors are charged. A control circuit for controlling the switches includes at least one flipflop (,) which stores the control state of the switches.