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. 25, 2021
Filed:
Feb. 28, 2020
Nxp B.v., Eindhoven, NL;
Alexander Sebastian Delke, Enschede, NL;
Mark Stefan Oude Alink, Delden, NL;
Anne Johan Annema, Hengelo, NL;
Yanyu Jin, Eindhoven, NL;
Jos Verlinden, Wachtendonk, DE;
Bram Nauta, Borne, NL;
NXP B.V., Eindhoven, NL;
Abstract
A frequency reference generator includes (i) an integrated frequency source having drive circuitry that drives a resonant (e.g., non-trimmable LC) tank to generate an oscillator signal, (ii) at least one temperature sensor that generates at least one measured temperature signal, and (iii) a frequency-adjustment circuit that adjusts the oscillator signal frequency to generate the frequency reference based on the measured temperature signal and a (e.g., sample-specific) mapping from temperature to a corresponding frequency-adjustment parameter (e.g., a divisor value for a fractional frequency divider). In some embodiments, a Colpitts oscillator generates the oscillator signal based on the measured temperature signal, where the Colpitts oscillator has voltage/temperature-compensation circuitry that compensates for variations in power supply voltage and operating temperature. Such frequency reference generators achieve substantial PVT insensitivity with as little as a single 1T-trim or even no trim at all.