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:
Aug. 06, 2019
Filed:
Jan. 05, 2017
Sdrf Eurl, Biot, FR;
Biagio Bisanti, Antibes, FR;
Eric Duvivier, Vallauris Golfe Juan, FR;
Lorenzo Carpineto, Antibes, FR;
Stefano Cipriani, Antibes, FR;
Francesco Coppola, Grasse, FR;
Gianni Puccio, La Gaude, FR;
Rémi Artinian, Antibes, FR;
Francois Marot, Antibes, FR;
Vanessa Bedero, Vence, FR;
Lysiane Koechlin, Vallauris, FR;
SDRF EURL, Sophia Antipolis, Biot, FR;
Abstract
Variable frequency oscillators allowing wide tuning range and low phase noise is disclosed. In an illustrative embodiment, a first transistor has a first terminal (e.g. collector) connected to a reference voltage, and a second terminal (e.g. emitter) connected to a first terminal of a first current source and to ground. The first transistor further has a third terminal connected to a first inductor and to a first capacitor connected to the emitter of the first transistor and also to a second capacitor connected to ground. A second transistor is similarly constructed. In order to achieve a variable frequency oscillation between the emitters of the two transistors, a variable tank capacitor is connected between the inductors, forming a circuit connecting in series all passive components composing the LC tank, masking most of parasitic capacitances.