Patent · US Active

Frequency synthesizer

US9843334B2 · kind B2 · utility

2Cited by

3References

9Claims

0Family size

Assignee

Nordic Semiconductor ASA · NO

Inventors

Stein Erik Weberg · Trondheim, NO
Ola Bruset · Trondheim, NO

Key dates

Filing date	Mar 5, 2015
Grant date	Dec 12, 2017
Priority date	—
Expiry date	Mar 5, 2035

Classification

Technology area (CPC H)Electricity
CPC primaryH04L7/0331
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A phase locked loop frequency synthesizer is arranged to provide a target frequency output signal for a radio transmitter or receiver. The synthesizer comprises: a voltage controlled oscillator (2) operating at a first frequency; a first, fixed frequency divider to provide a second frequency, a pre-scaler to provide a variable frequency division of said second frequency to produce a third frequency, said pre-scaler comprising: a second frequency divider (14) connected to said first output (12) and providing a second output at a second frequency; and a phase detector (4) controlling said voltage controlled oscillator (2) on the basis of a comparison between a reference signal and a signal dependent on said third frequency; wherein the synthesizer is configured so that said first output (10, 12) provides said target frequency output signal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.