The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 07, 2001
Filed:
Jan. 12, 1998
Navraj Nandra, Le Landeron, CH;
Thierry Roz, Neuchâtel, CH;
EM Microelectronic-Marin SA, Marin, CH;
Abstract
A base station (,) for a contactless interrogation system includes an oscillating device (,) supplying a control signal having a frequency which is adjustable via adjusting circuits (,), a circuits (,) for controlling an antenna connected to the base station (,) for transmitting information, decoding circuits (,) for decoding the information picked up by the antenna. The oscillating device (,) is a voltage controlled oscillator which is phase locked by the adjusting circuits (,), so that the control signal frequency is determined by the base station (,) and is adapted to the antenna. The sensitivity of a contactless interrogation system comprising the base station (,) of the present invention is improved, its structure is simpler and its different components can be integrated in a same chip.