Passive transponder with a charging circuit and method for generating a supply voltage for a passive transponder

摘要

Passive transponder having a charging circuit for a supply voltage capacitor, a first parallel resonant circuit having a first coil and a first resonant circuit capacitor, wherein the first coil and the first resonant circuit capacitor are connected to a first node, a first rectifier, which connects to the first node and the supply voltage capacitor is a second parallel resonant circuit, having a second coil, which is aligned substantially orthogonal to the first coil, and a second resonant circuit capacitor, wherein the second coil and the second resonant circuit capacitor are connected to a second node, and wherein a second rectifier is provided, which is connected to the second node and the supply voltage capacitor and the second rectifier has the same forward direction as the first rectifier.