US5930128A
Expired / Lapsed
US
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Power waveform synthesis using bilateral devices
Assignee: Unwired Planet LLC
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Filing: 1998-04-02
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Granted: 1999-07-27
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Expires: 2018-04-02
Abstract
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.
Inventors
- 👤 Paul Wilkinson Dent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:18
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/72; H03F1/00; H03F1/32; H03F1/3223; H03F3/20; H03F3/21; H03F3/217; H03F3/2178; H03F2200/00; H03F2200/537; H03F2200/541
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
145 words
Apparatus for synthesizing from an input waveform, an output waveform in a load using a DC power supply, the synthesizing apparatus comprising: means for representing the 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 amplifying means, a respective one of which is associated with a respective one of the digits, for consuming current from the DC power supply and for returning 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; and means for serially coupling the output voltage levels of the plurality of bilateral amplifying means to the load, with a weighting that is based upon the place significance of the associated digit.
Claim 2
Dependent Claim
145 words
Apparatus for synthesizing from an input waveform, an output waveform in a load using a DC power supply, the synthesizing apparatus comprising: means for representing the 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 amplifying means, a respective one of which is associated with a respective one of the digits, for consuming current from the DC power supply and for returning 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; and means for serially coupling the output voltage levels of the plurality of bilateral amplifying means to the load, with a weighting that is based upon the place significance of the associated digit.
Claim 3
Dependent Claim
62 words
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.
Claim 4
Dependent Claim
56 words
Apparatus according to claim 1 wherein the bilateral amplifying means are at least one of field effect transistors that conduct from source to drain and from drain to source, and bipolar transistors including reverse conduction diodes that conduct in a forward direction through the bipolar transistor and in the reverse direction through the reverse conduction diodes.
Claim 5
Dependent Claim
22 words
Apparatus according to claim 1 wherein the input waveform is a DC input waveform, to provide a DC to AC power converter.
Claim 6
Dependent Claim
15 words
Apparatus according to claim 3 wherein the output waveform is an approximately sinusoidal output waveform.
Claim 7
Dependent Claim
26 words
Apparatus according to claim 1 wherein the number base is binary and wherein the plurality of bilateral amplifying means comprises a plurality of square wave inverters.
Claim 8
Dependent Claim
38 words
Apparatus according to claim 1 wherein the number base is ternary and wherein the plurality of bilateral amplifying means comprises a plurality of square wave inverters with zero clamping to generate positive, zero and negative output voltage levels.
Claim 9
Dependent Claim
59 words
Apparatus according to claim 1 further comprising at least one linear amplifier that is associated with at least two of the least significant digits to generate a linear output voltage that is proportional to the combined values of the at least two least significant digits, the serially coupling means also serially coupling the linear output voltage to the load.
Claim 10
Dependent Claim
146 words
Apparatus for synthesizing from an input waveform, an output waveform in a load using a DC power supply, the synthesizing apparatus comprising: a numerical code generator that represents the input waveform as a sequence of numerical codes in a number base, each numerical code comprising a plurality of digits ordered by place significance; and a plurality of bilateral amplifiers, a respective one of which is associated with a respective one of the digits, the bilateral amplifiers consuming current from the DC power supply and returning 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 being serially coupled to the load, with a weighting that is based upon the place significance of the associated digit.
Claim 11
Dependent Claim
146 words
Apparatus for synthesizing from an input waveform, an output waveform in a load using a DC power supply, the synthesizing apparatus comprising: a numerical code generator that represents the input waveform as a sequence of numerical codes in a number base, each numerical code comprising a plurality of digits ordered by place significance; and a plurality of bilateral amplifiers, a respective one of which is associated with a respective one of the digits, the bilateral amplifiers consuming current from the DC power supply and returning 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 being serially coupled to the load, with a weighting that is based upon the place significance of the associated digit.
Claim 12
Dependent Claim
58 words
Apparatus according to claim 9 further comprising 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 amplifiers, the primary-to-secondary turns ratios of the plurality of transformers being proportional to the place significance of the associated digit.
Claim 13
Dependent Claim
55 words
Apparatus according to claim 9 wherein the bilateral amplifiers are at least one of field effect transistors that conduct from source to drain and from drain to source, and bipolar transistors including reverse conduction diodes that conduct in a forward direction through the bipolar transistor and in the reverse direction through the reverse conduction diodes.
Claim 14
Dependent Claim
22 words
Apparatus according to claim 9 wherein the input waveform is a DC input waveform, to provide a DC to AC power converter.
Claim 15
Dependent Claim
15 words
Apparatus according to claim 11 wherein the output waveform is an approximately sinusoidal output waveform.
Claim 16
Dependent Claim
25 words
Apparatus according to claim 9 wherein the number base is binary and wherein the plurality of bilateral amplifiers comprise a plurality of square wave inverters.
Claim 17
Dependent Claim
37 words
Apparatus according to claim 9 wherein the number base is ternary and wherein the plurality of bilateral amplifiers comprise a plurality of square wave inverters with zero clamping to generate positive, zero and negative output voltage levels.
Claim 18
Dependent Claim
56 words
Apparatus according to claim 9 further comprising at least one linear amplifier that is associated with at least two of the least significant digits to generate a linear output voltage that is proportional to the combined values of the at least two least significant digits, the linear output voltage also being serially coupled to the load.
Claim 19
Independent Claim
132 words
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: representing the input waveform as a sequence of numerical codes in a number base, each numerical code comprising a plurality of digits ordered by place significance; bilaterally amplifying the value of each of the digits, to consume current from the DC power supply and return current to the DC power supply based on the value of the associated digit, and thereby generate a plurality of output voltage levels each of which is proportional to the value of the associated digit; and serially coupling the plurality of output voltage levels to the load, with a weighting that is based upon the place significance of the associated digit.
Claim 20
Independent Claim
132 words
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: representing the input waveform as a sequence of numerical codes in a number base, each numerical code comprising a plurality of digits ordered by place significance; bilaterally amplifying the value of each of the digits, to consume current from the DC power supply and return current to the DC power supply based on the value of the associated digit, and thereby generate a plurality of output voltage levels each of which is proportional to the value of the associated digit; and serially coupling the plurality of output voltage levels to the load, with a weighting that is based upon the place significance of the associated digit.
Claim 21
Dependent Claim
24 words
A method according to claim 17 wherein the input waveform is a DC input waveform, to provide a DC to AC power converting method.
Claim 22
Dependent Claim
16 words
A method according to claim 17 wherein the output waveform is an approximately sinusoidal output waveform.
Claim 23
Dependent Claim
52 words
A method according to claim 17 further comprising the step of: linearly amplifying at least two of the least significant digits to generate a linear output voltage that is proportional to the combined values of the at least two least significant digits; and serially coupling the linear output voltage to the load.
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