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.
Claims2
A signal generator comprising:
- a memory storing a signal corresponding to the output of a delta-sigma oscillator or generator, the memory being arranged to output a modulated signal
- a power supply;
- a switching stage connected to the power supply and the memory for controlling the output of a power signal from said power supply on the basis of the modulated signal from the memory;
- and
- an output circuit for acting on the power signal to generate a generator output signal.
A signal generator comprising:
- a processor storing a program representing the control of a switching stage using the output of a delta-sigma oscillator or generator;
- a power supply;
- a switching stage connected to the processor for control thereby under the effect of the program, the switching stage being arranged to control the output of a power signal from said power supply;
- and
- an output circuit for acting on the power signal to generate a generator output signal.
Dependencies are inferred from the claim text.