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. 19, 2016
Filed:
Jul. 31, 2015
Shure Acquisition Holdings, Inc., Niles, IL (US);
Michael Goodson, Union, IL (US);
Yang Tang, Wilmette, IL (US);
Shure Acquisition Holdings, Inc., Niles, IL (US);
Abstract
Embodiments include a hybrid frequency synthesizer comprising a direct digital synthesizer configured to generate a digital output signal having a frequency determined by an input signal received from an externally-generated signal source. The hybrid frequency synthesizer further includes a delta sigma modulator configured to generate a delta-sigma modulated signal based on the digital output signal, the delta sigma modulator being coupled to the direct digital synthesizer. The hybrid frequency synthesizer also includes a digital-to-analog converter configured to convert the delta-sigma modulated signal into an analog output signal, the digital-to-analog converter being coupled to the delta-sigma modulator. Moreover, the hybrid frequency synthesizer includes a bandpass filter configured to remove interference frequencies from the analog output signal, the bandpass filter being coupled to the digital-to-analog converter; and a phase locked loop coupled to the band pass filter and driven by a reference signal received therefrom.