Electronic device comprising an operating mode switching unit

US8958766B2 · kind B2 · utility

Assignee

• SmartExergy WMS GmbH · DE

Inventors

• Tolgay Ungan · Glückstadt, DE
• Gerd Ulrich Gamm · Freiburg (Elbe), DE
• Leonhard Reindl · Kirchzarten, DE
• Thomas Ostertag · Ulm, DE
• Matthias Sippel · Fulda, DE
• Thomas Wendt · Colfax, US

Key dates

• Filing date: Jan 14, 2013
• Grant date: Feb 17, 2015
• Expiry date: May 26, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02D30/70
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

An electronic appliance comprising an electrical circuit and an operating mode switching unit which can be awakened out of a sleep state into a working state in which the current consumption of the circuit is greater in than in the sleep state. To receive a radio signal, the appliance has a receiver comprising a UHF carrier that is amplitude-modulated by a modulation signal. The receiver comprises a UHF antenna connected to a passive filter stage to an input of a passive rectifier circuit. An output of the rectifier circuit is connected to a detector for the modulation signal. To wake the electrical circuit from the sleep state, the operating mode switching unit has a control connection to the detector. The appliance has a low current draw in the sleep state by matching the output impedance of the rectifier circuit to the input impedance of the detector.