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.

Date of Patent:
Jan. 26, 2021

Filed:

May. 28, 2020
Applicant:

Nxp B.v., Eindhoven, NL;

Inventors:

Yanyu Jin, Eindhoven, NL;

Jos Verlinden, Wachtendonk, DE;

Maoqiang Liu, Eindhoven, NL;

Assignee:

NXP B.V., Eindhoven, NL;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B 5/12 (2006.01); H03L 1/02 (2006.01); H03B 1/02 (2006.01); H03L 7/099 (2006.01);
U.S. Cl.
CPC ...
H03B 1/02 (2013.01); H03B 5/1212 (2013.01); H03B 5/1215 (2013.01); H03B 5/1228 (2013.01); H03B 5/1265 (2013.01); H03B 5/1271 (2013.01); H03L 1/02 (2013.01); H03L 7/099 (2013.01);
Abstract

An LC oscillator has a tank driver connected to cause a matched-resistance LC tank to oscillate. The LC tank has an inductor leg in parallel with a capacitor leg. The inductor leg has an explicit inductor having an implicit resistance level R. The capacitor leg has an explicit capacitor having an implicit resistance level Rconnected in series with an explicit resistor having an explicit resistance level R, where R=(R+R) is substantially equal to R. The LC oscillator may have a non-trimmable LC tank and be part of a temperature-compensated frequency reference generator having standalone frequency adjustment circuitry that offers better than ±0.1% frequency accuracy (after single trim and batch calibration) over process, voltage, and temperature variations, and lifetime, which can serve as a low-cost replacement for a crystal oscillator for many applications.


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