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. 23, 2013
Filed:
Jul. 06, 2011
Applicant:
Stephane Razafimandimby, Grenoble, FR;
Inventor:
Stephane Razafimandimby, Grenoble, FR;
Assignee:
STMicroelectronics SA, Montrouge, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03B 5/12 (2006.01); H03K 3/282 (2006.01); H03K 3/354 (2006.01);
U.S. Cl.
CPC ...
Abstract
A controlled oscillator includes, connected in parallel, a capacitor configured to be tuneable based upon a first signal, an inductor, and an active impedance. The active impedance is formed by a pair of cross-coupled transistors connected so as to produce a negative resistive component at the terminals of the active impedance. Circuitry produces a degeneracy tuneable by a second signal in the cross-coupled pair, such that the cross-coupled pair produces a capacitive component tuneable based upon the second signal at the terminals of the active impedance.