Method and arrangement for interference compensation in a voltage-controlled frequency generator

US7498888B2 · kind B2 · utility

Assignee

• NXP B.V. · NL

Inventors

• Gunnar Nitsche · Hildesheim, DE
• Volker Aue · Dortmund, DE
• Andreas Bury · Dresden, DE

Key dates

• Filing date: Dec 10, 2004
• Grant date: Mar 3, 2009
• Expiry date: Oct 27, 2025

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03L2207/06
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

The invention, which relates to a method and an arrangement for interference compensation in a phase-locked loop comprising a voltage-controlled frequency generator, wherein the frequency generator is tuned to a nominal frequency by a tuning voltage Vtune and whose actual frequency is compared with a reference frequency by means of a frequency comparison and is re-adjusted if a deviation is detected via the frequency comparison, in which case, in the event of interference, the tuning voltage Vtune is changed by an interference voltage Vstör that depends on the interference event, and thus a frequency deviating from the nominal frequency is generated, which deviating frequency is corrected again by the phase locked loop, is based on the object to provide a method and an arrangement for interference compensation in a phase-locked loop comprising a voltage-controlled frequency generator, with which a deviation from a predefined nominal frequency is avoided if known interference events occur. The object is achieved in accordance with the invention in a method whereby, if a known interference event occurs, a voltage Vstör which compensates for the interference voltage Vcomp, is generate…