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:
May. 13, 2014
Filed:
Sep. 08, 2009
Abdellatif Bellaouar, Richardson, TX (US);
See Taur Lee, Allen, TX (US);
Sher Jiun Fang, Allen, TX (US);
Sherif H. K. Embabi, Plano, TX (US);
Tajinder Manku, Waterloo, CA;
Abdellatif Bellaouar, Richardson, TX (US);
See Taur Lee, Allen, TX (US);
Sher Jiun Fang, Allen, TX (US);
Sherif H. K. Embabi, Plano, TX (US);
Tajinder Manku, Waterloo, CA;
Icera, Inc., Wilmington, DE (US);
Abstract
A transmitter architecture having a single signal path or hardware to cover WCDMA/EDGE/GSM applications, and requires no SAW at the transmitter outputs. The transmitter architecture allows for a transmit convergence feature. A passive mixer with unique driver and furthermore using native devices available from the CMOS process for the mixer cores enables low voltage and low power design, low output noise and high linearity. A digital variable gain amplifier has the capability to cover wide output dynamic range operated from low supply voltage and interfaced digitally with the baseband circuit without DAC. A single transformer is used to combine the outputs from the WCDMA/EDGE and GSM drivers and subsequently convert the differential signal paths into a single-ended signal. RF switches are used to divert the output from the transformer to different bands and applications.