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. 25, 2006
Filed:
Feb. 26, 2003
Jinn-ja Chang, Hsinchu, TW;
Dung-yun Chen, Hsinchu, TW;
Jinn-Ja Chang, Hsinchu, TW;
Dung-Yun Chen, Hsinchu, TW;
Terax Communication Technologies, Inc., Hsinchu, TW;
Abstract
A wireless transmitter is proposed. First, a ROM having a lookup table therein is provided. The lookup table is used to store a plurality of IF modulation signals so that a state machine can select a corresponding IF modulation signal from the lookup table of the ROM according to loaded data and output a digital IF modulation signal to a DAC, which then converts the digital IF modulation signal into an analog IF modulation signal to be filtered by a low pass filter. Finally, a local oscillator is utilized to modulate the filtered analog IF modulation signal to an emission frequency, hence obtaining an RF signal. The transmitter makes use of a time-sharing way to use a local oscillator together with the receiver. Complexity of device can thus be simplified to meet the requirement of compactness of wireless products.