Voltage converter
AssigneeNGK Insulators, Ltd.
InventorsYukihisa Takeuchi, Iwao Ohwada
Life of this patent
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Abstract
Two sets of two relay switches, which charge a pump capacitor and a reservoir capacitor of a charge pump type voltage converter, are formed respectively by a set of plural piezo-electric relays, and both the capacitors are formed together with the piezo-electric relays on one substrate. Electrodes are provided respectively on both surfaced of a piezo-electric film, and operating sections are operated by applying a power-supply voltage thereto, and a movable terminal is brought into contact with a counter terminal plate due to deformation of the operating section so that the piezo-electric relays are turned on.
Claims126
A charge pump type voltage converter having a pump capacitor, a reservoir capacitor and a plurality of switch elements,
- wherein said switch elements are composed of piezo-electric relays, and actuator sections of said piezo-electric relays have a shape holding layer, an operating section having at least a pair of electrodes formed on said shape holding layer, a vibration section for supporting said operating section and a fixing section for supporting said vibration section vibratingly,
- said vibration section and said fixing section are formed integrally by ceramic, and said shape holding layer is composed of a piezo-electric and/or electrostrictive layer and/or an anti-ferroelectric layer.
Dependencies are inferred from the claim text.