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:
Jul. 03, 2001
Filed:
Apr. 22, 1999
David Alan Brown, Bishop's Stortford, GB;
Fraser Murray Edwards, Bishop's Stortford, GB;
John Jackson Nisbet, Nepean, CA;
Christian Ansorge, Ulm, DE;
Nortel Network Limited, Montreal, CA;
Abstract
This invention relates to a radio transceiver operable in multiple modes. The transceiver is operable, in one embodiment, to communicate with digital and analogue modulation format cellular radio systems. The handset utilizes a novel frequency plan and architecture to enable a minimum level of complexity for dual-moe operation. The frequency plan preferably uses two local oscillators 1LO, 2LO to general all the required frequencies for both the digital and analogue modulation format transceivers, derived from a single reference crystal oscillator. A radio architecture is used to enable switchable dual-mode operation with maximum commonality of functional blocks to facilitate silicon integration.