Power amplifier system with multiple primary windings
First Claim
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1. A power amplifier system comprising:
- a plurality of amplifiers, each of which includes an input that is commonly coupled to a system input port, and each of which includes an output;
a plurality of primary transformer windings, each of which is coupled to the output of one of the plurality of amplifiers; and
a single secondary transformer winding that is inductively coupled to all of said primary transformer windings and sums coupled flux from each of said primary transformer windings and which provides a system output port to which a load may be coupled.
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Abstract
The invention provides a power amplifier system including a plurality of amplifiers, a plurality of primary transformer windings, a single secondary transformer winding. Each of the plurality of amplifiers includes a differential input that is commonly coupled to a system input port, and each the plurality of amplifiers also includes a differential output. Each of the plurality of primary transformer windings is coupled to the differential output of one of the plurality of amplifiers. The single secondary transformer winding is inductively coupled to all of the primary transformer windings and provides a system output port to which a load may be coupled.
51 Citations
20 Claims
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1. A power amplifier system comprising:
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a plurality of amplifiers, each of which includes an input that is commonly coupled to a system input port, and each of which includes an output;
a plurality of primary transformer windings, each of which is coupled to the output of one of the plurality of amplifiers; and
a single secondary transformer winding that is inductively coupled to all of said primary transformer windings and sums coupled flux from each of said primary transformer windings and which provides a system output port to which a load may be coupled. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 17, 19, 20)
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10. A power amplifier system comprising:
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a plurality of m amplifiers, each of which includes an input that is commonly coupled to a system input port, and each of which includes an output;
a plurality of m primary transformer windings, each of which has substantially the same number N of windings, and each of which is coupled to the output of one of the plurality of amplifiers; and
a single secondary transformer winding that is inductively coupled to all of said primary transformer windings and sums coupled flux from each of said primary transformer windings such that the turns ratio from each primary transformer winding to the secondary transformer winding is N;
1.- View Dependent Claims (11)
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12. A power amplifier system comprising:
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a plurality of m primary transformer windings, each of which has substantially the same number N of windings;
at least two amplifiers, each of which includes an input that is coupled to a system input port and includes an output that is coupled to at least one of said plurality of m primary transformer windings; and
a single secondary transformer winding that is inductively coupled to all of said primary transformer windings and sums coupled flux from each of said primary transformer windings such that the turns ratio from each primary transformer winding to the secondary transformer winding is N;
1.- View Dependent Claims (13, 14, 18)
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15. A power amplifier system comprising:
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a plurality of m primary transformer windings, each of which has substantially the same number N of windings; and
a single secondary transformer winding that is inductively coupled to all of said primary transformer windings and sums coupled flux from each of said primary transformer windings such that the turns ratio from each primary transformer winding to the secondary transformer winding is N;
1, wherein said system further includes a plurality of amplifiers, each of which is coupled to one of the plurality of primary transformer windings.
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16. A power amplifier system comprising:
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a first primary transformer winding including a positive input port and a negative input port for providing a first current through said first primary transformer winding in a first positive direction, said first primary transformer winding being coupled to a first amplifier;
a second primary transformer winding including a positive input port and a negative input port for providing a second current through said second primary transformer winding in a second positive direction, said second primary transformer winding being coupled to a second amplifier;
a secondary transformer winding that includes a positive output port and a negative output port and receives an inductively coupled current from said first and second primary transformer windings; and
power amplifier circuitry that includes said first and second amplifiers and couples said first and second primary transformer windings and said secondary transformer winding such that said first and second positive directions are the same with respect to said secondary transformer winding, providing a summation of said first and second currents at said secondary transformer winding.
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Specification
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Current AssigneeIkanos Communications Incorporated (Qualcomm, Inc.)
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Original AssigneeAnalog Devices, Inc.
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InventorsSabouri, Faramarz, Shariatdoust, Reza
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Primary Examiner(s)NGUYEN, PATRICIA T
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Application NumberUS09/994,247Time in Patent Office890 DaysField of Search330/69, 330/124.R, 330/165, 330/195US Class Current330/124.00RCPC Class CodesH03F 2200/541 Transformer coupled at the ...H03F 3/211 using a combination of seve...H03F 3/45475 using IC blocks as the acti...
