High-frequency signal generator with low phase noise
AssigneeRohde & Schwarz GmbH & Co. KG
InventorAlexander Roth
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Abstract
A high-frequency oscillator comprises a reference-frequency generator and a high-frequency generator. The reference-frequency generator generates a variable reference frequency and supplies it to the high-frequency generator. The high-frequency generator comprises a phase-locked loop and generates a high-frequency signal from the variable reference frequency. The phase-locked loop comprises at least one first mixer, a second mixer and several switches. The first mixer, the second mixer and the switches are connected in series. The mixers are connected into the phase-locked loop individually in a selective manner by means of the switches.
Claims14
A high-frequency oscillator comprising:
- a reference-frequency generator;
- and
- a high-frequency generator,
- wherein the reference-frequency generator is configured to generate a variable reference frequency and to supply the variable reference frequency at least indirectly to the high-frequency generator,
- wherein the high-frequency generator comprises a phase-locked loop,
- wherein the high-frequency generator is configured to generate a high-frequency signal at least indirectly from the variable reference frequency,
- wherein the phase-locked loop comprises a plurality of mixers, a plurality of switches, and a plurality of lowpass filters, wherein each mixer is associated with one or more of the switches, and a one of the lowpass filters is located after each mixer,
- wherein each mixer and the associated switches are configured in a manner whereby the mixer can be connected into the phase-locked loop individually in a selective manner by means of the switches.
Dependencies are inferred from the claim text.