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US 5,930,128 AGranted
Power waveform synthesis using bilateral devices
AssigneeEricsson Inc.
InventorPaul Wilkinson Dent
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AssigneeEricsson Inc.
InventorPaul Wilkinson Dent
Estimating the term…
Waveform synthesizers represent an input waveform as a sequence of numerical codes in a number base, each numerical code comprising a plurality of digits ordered by place significance. A plurality of bilateral amplifiers is provided, a respective one of which is associated with a respective one of the digits. The bilateral amplifiers consume current from the DC power supply and return current to the DC power supply based on the value of the associated digit, to thereby generate an output voltage level that is proportional to the value of the associated digit. The output voltage levels of the plurality of bilateral amplifiers are serially coupled to the load, with a weighting that is based upon the place significance of the associated digit. Waveform synthesizers that are so constructed are capable of theoretical efficiencies of 100% for any signal waveform. These waveform synthesizers may be used efficiently to amplify to a transmit power level or radio signal that varies in amplitude as well as phase. These waveform synthesizers may also be used as a DC-to-AC converter having a sinusoidal output waveform.
Apparatus for synthesizing from an input waveform, an output waveform in a load using a DC power supply, the synthesizing apparatus comprising:
Apparatus according to claim wherein the serially coupling means comprises a plurality of transformers, each having a primary and a secondary, the secondaries being serially coupled to the load, a respective primary being coupled to a respective one of the bilateral amplifying means, the primary-to-secondary turns ratios of the plurality of transformers being proportional to the place significance of the associated digit.
Apparatus for synthesizing from an input waveform, an output waveform in a load using a DC power supply, the synthesizing apparatus comprising:
A method for synthesizing from an input waveform, an output waveform in a load using a DC power supply, the synthesizing method comprising the steps of:
Dependencies are inferred from the claim text.