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:
Nov. 16, 2010
Filed:
Sep. 12, 2005
David R. Welland, Austin, TX (US);
Ramkishore Ganti, Dripping Springs, TX (US);
Caiyi Wang, Austin, TX (US);
David R. Welland, Austin, TX (US);
Ramkishore Ganti, Dripping Springs, TX (US);
CaiYi Wang, Austin, TX (US);
Silicon Laboratories, Inc., Austin, TX (US);
Abstract
An RF transmitter () includes a shared local oscillator circuit (), transmit path circuitry (), a divider (), and a lowpass filter (). The shared local oscillator circuit () generates a shared LO signal (). The transmit path circuitry () mixes a baseband signal () and an IF mixing signal () to provide an IF signal (), and converts the IF signal () to an RF transmit signal () at a desired frequency using an RF mixing signal received at a mixing input thereof. The divider () divides the shared LO signal () to provide an unfiltered RF mixing signal. The lowpass filter () has an input for receiving the unfiltered RF mixing signal, and an output coupled to the mixing input of the transmit path circuitry () for providing the RF mixing signal.