Signal generator
AssigneeRadiodetection Limited
InventorRichard David Pearson
Life of this patent
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Abstract
A signal generator controls power output on the basis of the output from a Δ-Σ modulator or oscillator. That output may be generated in real time by the modulator or oscillator and fed to a switch control logic unit which controls a power switching stage to output switchably switched power from a power supply to an output, preferably via a filter. Alternatively the output of a Δ-Σ oscillator or modulator may be stored in a switchable memory to be retrieved when needed. A further alternative is to control the power switching stage by a processor with a program which reproduces the control effect of the Δ-Σ oscillator/modulator Feedback from the output may be used to control the Δ-Σ modulator/oscillator and/or the power supply.
Claims6
A signal generator comprising:
- a waveform generator for generating a predetermined waveform;
- a delta-sigma modulator connected to the waveform generator to receive the predetermined waveform, said delta-sigma modulator generates a modulated signal, wherein delta sigma modulator is a second-order delta system modulator;
- a power supply;
- a switching stage connected to the power supply and the delta-sigma modulator for controlling the output of a power signal from said power supply on the basis of the modulated signal from the delta-sigma modulator;
- and
- an output circuit for acting on the power signal to generate a generator output signal.
A signal generator comprising:
- a delta-sigma oscillator for generating a modulated signal, wherein the delta-sigma oscillator is a second order delta-sigma oscillator;
- a power supply;
- a switching stage connected to the power supply and the delta-sigma oscillator for controlling the output of power signal from said power supply on the basis of the modulated signal from the delta-sigma oscillator;
- and
- an output circuit for acting on the power signal to generate a generator output.
Dependencies are inferred from the claim text.