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:
Oct. 01, 2002
Filed:
Sep. 17, 1999
Paul Burgess, Bochum, DE;
Nokia Mobile Phones Limited, Espoo, FI;
Abstract
A radio transceiver circuit which includes an antenna, a transmitter, a receiver, an antenna switching circuit for selectively connecting the transmitter and the receiver to the antenna, and a power source for driving the transmitter and the receiver. The antenna switching circuit includes two semiconductor elements. The current (| , | ) provided by the power source to the receiver and to the transmitter is directed through the respective semiconductor elements which are each set to its conductive electrical state by the respective current (| , | ) and thereby selectively coupling the radio signal between the receiver and the transmitter to the antenna.