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:
Sep. 01, 2020
Filed:
Oct. 28, 2019
Nxp B.v., Eindhoven, NL;
Burkhard Dick, Hamburg, DE;
Andreas Hans Walter Wichern, Hamburg, DE;
NXP B.V., Eindhoven, NL;
Abstract
A differential crystal oscillator circuit is disclosed. The differential crystal oscillator circuit includes an output port. The output port includes a first terminal and a second terminal. A resonance port is included to couple a resonance element to the differential crystal oscillator circuit. The differential crystal oscillator includes a current source. A differential amplifier is included to excite the resonance element. The differential amplifier is coupled to the current source and the resonance port. The differential amplifier includes a plurality of transistors. The differential crystal oscillator circuit further includes a low pass filter that in combination with a transistor in the differential amplifier exhibits characteristics of a high pass filter. The differential amplifier is configured to use the current source as an active load.