Patent ID: 7737821
Filing Date: 2010-06-15
Classification: G06K

Abstract:
1. A reader for use with a tag that communicates data to the reader, the reader comprising: a transformer having a plurality of windings, each winding having first and second terminals; a coil driver having first and second output terminals; two capacitors, each capacitor having first and second terminals, the first and second output terminals of the coil driver being connected to the first terminals of the capacitors, the second terminals of the capacitors being connected to the first and second terminals of a winding of the transformer; a coil having first and second terminals connected respectively to the first and second end terminals of a winding of the transformer; a data extractor for extracting data from the signal induced in the coil, the data extractor having first and second terminals connected respectively to first and second terminals of a winding of the transformer.