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:
Apr. 05, 1994
Filed:
Aug. 25, 1992
Applicant:
Inventor:
Jarmo J Heinonen, Salo, FI;
Assignee:
Nokia Mobile Phones Ltd., Salo, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
455 76 ; 455 86 ;
Abstract
A synthesizer for a radio transceiver uses a Direct Digital Synthesis (DDS) system (3) to provide a modulated signal for the transmitter section. The modulated signal (So) is then mixed in a mixer (4) using a signal from a local oscillator (1) to provide the signal for transmission. The reference frequency for the DDS system is provided by the local oscillator (1) of the receiver section. The local oscillator is used to provide the signal for the mixer (4).