Patent ID: 11889619
Assignee: FREEVOLT TECHNOLOGIES LIMITED
Field: Telecommunications (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 10:
11. An auxiliary rectifier apparatus for integration into a smart card having RF communications capability, the apparatus comprising: a substrate carrying electrical components in said smart card for connection to a near field RF communications chip; and a rectifying element on said substrate separate from said near field RF communications chip for rectifying an alternating electrical signal provided from a near field RF communications antenna connected to said near field RF communications chip to provide an auxiliary power supply; wherein the rectifier further comprises a printed coil inductor, connected to the rectifying element, wherein the printed coil inductor is provided on and surrounded by a region of the substrate that does not comprise any ground plane, comprising a low pass filter on said substrate and connected to the output of the rectifying element; wherein the low pass filter comprises the printed coil inductor.