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:
Feb. 04, 2025
Filed:
Feb. 24, 2021
Rohde & Schwarz Gmbh & Co. KG, Munich, DE;
Rohde & Schwarz GmbH & Co. KG, Munich, DE;
Abstract
A phase coherent synthesizer with good phase noise and spurious performance is described. The phase coherent synthesizer includes digital direct synthesizer (DDS) circuitry, frequency multiplier circuitry, an oscillator, and a mixing stage. The digital direct synthesizer (DDS) circuitry has a first output and a second output. The first output is associated with a fine resolution synthesis. The second output is associated with a step synthesis. A second output signal provided via the second output has a higher frequency compared with a first output signal provided via the first output. The frequency multiplier circuitry is connected with the second output. The frequency multiplier circuitry is configured to multiply the second output signal received via the second output, thereby generating a multiplied output signal. The mixing stage has two input ports connected with the frequency multiplier circuitry and the oscillator respectively. The mixing stage includes, for example, circuitry configured to mix the multiplied output signal and an oscillator output signal of the oscillator, thereby generating an intermediate frequency signal. The first output signal and the intermediate frequency signal are synchronized with each other.