Radio-frequency signal generator
AssigneeSiemens Aktiengesellschaft
InventorChristian Kranz
Life of this patent
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Abstract
A radio-frequency signal generator has a voltage-controlled oscillator for producing a radio-frequency signal. A frequency divider with a fixed division ratio has an input connected to the voltage-controlled oscillator and an output supplying a first clock signal. A first accumulator aggregates a first reference signal under the control of the first clock signal. A second accumulator aggregates a second reference signal under the control of a second clock signal. The aggregated signals are subtracted from one another, filtered through a digital filter, weighted and subsequently converted into an analog signal. The analog signal is filtered by an analog filter and fed to the voltage-controlled oscillator.
Claims8
A radio-frequency signal generator, comprising:
- a voltage-controlled oscillator for producing a radio-frequency signal;
- a frequency divider having an input connected to said voltage-controlled oscillator and an output supplying a first clock signal;
- a first accumulator aggregating a first reference signal under control of the first clock signal;
- a second accumulator aggregating a second reference signal under control of a second clock signal;
- a first digital filter filtering a difference signal obtained from the two aggregated reference signals and supplying an output signal;
- a second digital filter filtering an input signal;
- a digital-analog converter producing an analog signal from the output signal of said first digital filter;
- an adder connected between said first digital filter, said second digital filter and said digital-analog converter;
- and
- an analog filter filtering the analog signal fed to said voltage-controlled oscillator.
Dependencies are inferred from the claim text.