Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1999-07-26
2000-08-01
Wong, Peter S.
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
307 82, 330124R, H02M 112, H02J 100
Patent
active
060976152
ABSTRACT:
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.
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Ericsson Inc.
Patel Rajnikant B.
Wong Peter S.
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