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. 30, 2017
Filed:
Jul. 14, 2015
Texas Instruments Incorporated, Dallas, TX (US);
Yunhong Li, Santa Clara, CA (US);
Wei Ma, San Ramon, CA (US);
TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US);
Abstract
A frequency selectable driver circuit (driver circuit) includes a current drive transistor between a first and second node for driving a frequency selectable oscillator (FSO) coupled therebetween that includes a first LC network including an inductor Land a capacitor Cin series and a second LC network in series with the first LC network. The second LC network includes a capacitor bank including capacitors in parallel including switches for switching (selectable capacitors) and an inductor Lin parallel to the capacitor bank. Values of Land Cprovide a low frequency point fwhich the LC network is overall capacitive, and in a frequency range between fand fabove fwith only a portion of selectable capacitors selected a capacitance of the capacitor bank and value of Lresults in an overall impedance for the second LC network that is capacitive between fand fand inductive elsewhere.