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. 01, 2008
Filed:
Sep. 14, 2005
Peter Vancorenland, Austin, TX (US);
Lysander Lim, Austin, TX (US);
Augusto M. Marques, Austin, TX (US);
Scott D. Willingham, Austin, TX (US);
Peter Vancorenland, Austin, TX (US);
Lysander Lim, Austin, TX (US);
Augusto M. Marques, Austin, TX (US);
Scott D. Willingham, Austin, TX (US);
Silicon Laboratories Inc., Austin, TX (US);
Abstract
An oscillator includes a plurality of varactor cells to receive a control signal to control a frequency of the oscillator. Each of the varactor cells includes a switch that includes a first terninal to receive the control signal and a second terminal such that the switch operates to control a capacitance of the varactor cell in response to a voltage between the first and second terminals. The oscillator includes a bias circuit to provide a different bias voltage to each second terminal and an amplifier that is coupled to the varactor cells to generate an oscillating signal.