PASSIVE TRANSPONDER WITH A CHARGING CIRCUIT

• US 20150022322A1
• Filed: 10/10/2014
• Published: 01/22/2015
• Est. Priority Date: 12/27/2010
• Status: Active Grant

• Current Assignee: Atmel Corporation (Microchip Technology Incorporated)
• Original Assignee: Atmel Corporation (Microchip Technology Incorporated)
• Inventors: Ziegler, Werner
• Granted Patent: US 9,665,749 B2
• Time in Patent Office: Days
• US Class Current: 340/10.1
• CPC Class Codes: G06K 7/10009 sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
• CPC Class Codes: G07C 2009/00611 by using inductive transmission
• CPC Class Codes: G07C 9/00309 operated with bidirectional data transmission between data carrier and locks

Abstract

In one embodiment, a passive transponder comprising a first circuit comprising a first attenuator, the first circuit configured to receive a first signal from at least one base station and coupled to a first node, a first rectifier coupled to the first node, the first rectifier configured in a forward direction to charge a first capacitor, and the first capacitor coupled to the first rectifier, the first capacitor configured to receive a charge from the attenuator sufficient for powering the passive transponder.

Claims

1. A passive transponder comprising:

a first circuit comprising a first attenuator, the first circuit configured to receive a first signal from at least one base station and coupled to a first node;

a first rectifier coupled to the first node, the first rectifier configured in a forward direction to charge a first capacitor; and

the first capacitor coupled to the first rectifier, the first capacitor configured to receive a charge from the attenuator sufficient for powering the passive transponder.