Balanced radio frequency power amplifier with temperature compensation
First Claim
Patent Images
1. A radio frequency power amplifier comprising:
- first and second power transistors, the first and second transistors having a common element thereof electrically interconnected with a common bus; and
a forked conductor having two legs thereof electrically connected to the common bus, each leg having a distal end proximate one of the first and second amplifier transistors, wherein the common bus and the forked conductor are generally symmetric about an axis about which the first and second amplifier transistors are symmetrically disposed.
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Abstract
A radio frequency power amplifier has first and second amplifier transistors. The first and second amplifier transistors have a common element thereof electrically interconnected with a common bus. A forked conductor having two legs thereof electrically connected to the common bus, each leg having a distal end proximate one of the first and second amplifier transistors. The common bus and the forked conductor are generally symmetric about an axis about which the first and second amplifier transistors are symmetrically disposed.
65 Citations
123 Claims
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1. A radio frequency power amplifier comprising:
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first and second power transistors, the first and second transistors having a common element thereof electrically interconnected with a common bus; and
a forked conductor having two legs thereof electrically connected to the common bus, each leg having a distal end proximate one of the first and second amplifier transistors, wherein the common bus and the forked conductor are generally symmetric about an axis about which the first and second amplifier transistors are symmetrically disposed. - View Dependent Claims (2, 3, 4)
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5. A radio frequency power amplifier comprising:
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a first amplifier transistor having an input and an output;
a second amplifier transistor having an input and an output;
an input conductor in electrical communication with the inputs of the first and second transistors, the input conductor comprising;
a common bus formed proximate the first and second amplifier transistors and in electrical communication with an input of the first and second amplifier transistors;
a bifurcated conductor formed to the common bus and in electrical communication therewith; and
wherein the input conductor is generally symmetric about an axis about which the first and second amplifier transistors are symmetrically disposed. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A radio frequency power amplifier comprising:
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a first amplifier transistor having an input and an output;
a second amplifier transistor having an input and an output;
an output conductor in electrical communication with the outputs of the first and second transistors, the output conductor comprising;
a common bus formed proximate the first and second amplifier transistors and in electrical communication with an output of the first and second amplifier transistors;
a bifurcated conductor formed to the common bus and in electrical communication therewith; and
wherein the output conductor is generally symmetric about an axis about which the first and second amplifier transistors are symmetrically disposed. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. A radio frequency power amplifier comprising:
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a first amplifier transistor having an input and an output;
a second amplifier transistor having an input and an output;
an input conductor in electrical communication with the inputs of the first and second transistors, the input conductor comprising;
a common bus formed proximate the first and second amplifier transistors and in electrical communication with a input of the first and second amplifier transistors;
a bifurcated conductor formed to the common bus and in electrical communication therewith;
an output conductor in electrical communication with the outputs of the first and second transistors, the output conductor comprising;
a common bus formed proximate the first and second amplifier transistors and in electrical communication with a output of the first and second amplifier transistors;
a bifurcated conductor formed to the common bus and in electrical communication therewith; and
wherein both the input conductor and the output conductor are generally symmetric about an axis about which the first and second amplifier transistors are symmetrically disposed. - View Dependent Claims (48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65)
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66. A temperature compensation circuit for a radio frequency power amplifier, the temperature compensation circuit comprising a semiconductor device in thermal communication with at least one amplifier transistor, the semiconductor device being configured so as to short more of a gate signal to ground as a gain of the amplifier transistor increases.
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67. A temperature compensation circuit for a radio frequency power amplifier, the temperature compensation circuit comprising:
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a compensation transistor having an output thereof defining a portion of an electrical path from a gate input of an amplifier transistor to ground;
at least one current limiting resistor defining a portion of the electrical path from the gate input of the amplifier transistor to ground; and
wherein the transistor is in thermal communication with the amplifier transistor, such that as the amplifier transistor increases in temperature, the compensation transistor increases in temperature. - View Dependent Claims (68, 69)
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70. A radio frequency power amplifier comprising:
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a first amplifier transistor;
a second amplifier transistor;
a temperature compensation circuit, the temperature compensation circuit comprising a transistor having an output thereof defining a portion of an electrical path from a gate input of the first and second amplifier transistors to ground, the temperature compensation circuit further comprising at least one thermal tracking resistor defining a portion of the electrical path from the gate input to ground. - View Dependent Claims (71, 72, 73)
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74. A method for forming an input/output conductor for a radio frequency amplifier, the method comprising:
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forming a conductive conduit configured generally in the fashion of a Y, the Y having two branches;
forming a bus interconnecting two distal ends of the branches; and
wherein the conductive conduit and the bus are configured to be generally symmetric about a line which separates the two branches. - View Dependent Claims (75, 76)
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77. A method for amplifying radio frequency signals, the method comprising:
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applying a radio frequency signal to a trunk of a conductive conduit;
splitting the radio frequency signal into two components, one component being communicated through each of two branches of the conductive conduit;
communicating the signal from each branch through a bus, the bus interconnecting distal ends of the branches;
communicating the signal from the bus to inputs of two amplifier transistors; and
wherein the conductive conduit and the bus are configured to be generally symmetric about a line separates the two branches.
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78. A method for amplifying radio frequency signals, the method comprising:
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communicating an amplified radio frequency signal from an output of two amplifier transistors to a bus;
communicating the amplified radio frequency signal from the bus to two branches of a conductive conduit, the bus interconnecting distal ends of the branches;
combining the amplified radio frequency signal from each branch into a common trunk of the two branches;
providing the combined amplified radio frequency signal as an output of a radio frequency amplifier; and
wherein the conductive conduit and the bus are configured to be generally symmetric about a line separates the two branches.
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79. A method for amplifying radio frequency signals, the method comprising:
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applying a radio frequency signal to a trunk of an input conductive conduit;
splitting the radio frequency signal into two components, one component being communicated through each of two branches of the input conductive conduit;
communicating the signal from each branch of the input conductive conduit to an input bus, the input bus interconnecting distal ends of the branches of the input conductive conduit;
communicating the signal from the input bus to inputs of two amplifier transistors;
communicating an amplified radio frequency signal from outputs of the two amplifier transistors to an output bus;
communicating the amplified radio frequency signal from the output bus to two branches of an output conductive conduit, the output bus interconnecting distal ends of the branches of the output conductive conduit;
combining the amplified radio frequency signal from each branch of the output conductive conduit into a common trunk of the output conductive conduit;
providing the combined amplified radio frequency signal as an output of a radio frequency amplifier; and
wherein the input conductive conduit and the input bus are configured to be generally symmetric about a line that separates the two branches of the input conduit and wherein the output conductive conduit and the output bus are configured to be generally symmetric about a line separates the two branches of the output conduit.
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- 80. A method for temperature compensation for a radio frequency power amplifier, the method comprising shorting more of a gate signal to ground as a gain of an amplifier transistor increases.
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84. A method for temperature compensation for a radio frequency power amplifier, the method comprising:
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communicating heat from at least one amplifier transistor to a compensation transistor;
communicating current from a gate input of the amplifier transistor to ground through the sensor transistor;
limiting current through the sensor transistor via at least one current resistor; and
wherein as the amplifier transistor increases in temperature, the compensation transistor decrease current flow from the gate input to ground therethrough. - View Dependent Claims (85)
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86. An input/output conductor for a radio frequency amplifier, the input/output conductor comprising:
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a bus configured to electrically interconnect two amplifier transistors;
a bifurcated conductor in electrical communication with the bus; and
wherein two portions of the bus and two portions of the bifurcated conductor are substantially electrically balanced with respect to one another. - View Dependent Claims (87)
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88. A radio frequency power amplifier comprising:
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a first amplifier transistor having an input and an output;
a second amplifier transistor having an input and an output, wherein the first and second amplifier transistors define an axis about which the first and second amplifier transistors are symmetrically disposed;
a splitting network electrically coupled to the inputs of the first and second transistor amplifiers for distributing an input signal of the RF power amplifier between the first and second amplifier transistors;
an input bus bar disposed perpendicular to the axis, wherein the first and second amplifier transistor inputs are electrically coupled in common to the input bus bar, and wherein the splitting network is electrically coupled to the inputs of the first and second amplifier transistors via the input bus bar; and
a combining network electrically coupled to the outputs of the first and second amplifier transistors for combining output signals from the first and second amplifier transistors into an output signal of the RF power amplifier. - View Dependent Claims (89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104)
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105. A radio frequency power amplifier comprising:
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a first amplifier transistor having an input and an output;
a second amplifier transistor having an input and an output, wherein the first and second amplifier transistors define an axis about which the first and second amplifier transistors are symmetrically disposed;
a splitting network electrically coupled to the inputs of the first and second transistor amplifiers for distributing an input signal of the RF power amplifier between the first and second amplifier transistors;
a combining network electrically coupled to the outputs of the first and second amplifier transistors for combining output signals from the first and second amplifier transistors into an output signal of the RF power amplifier; and
an output bus bar disposed perpendicular to the axis, wherein the first and second amplifier transistor outputs are electrically coupled in common to the output bus bar and wherein the combining network is electrically coupled to the outputs of the first and second amplifier transistors via the output bus bar. - View Dependent Claims (106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118)
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119. A radio frequency power amplifier comprising:
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a first amplifier transistor having an input and an output;
a second amplifier transistor having an input and an output, wherein the first and second amplifier transistors define an axis about which the first and second amplifier transistors are symmetrically disposed;
a splitting network electrically coupled to the inputs of the first and second transistor amplifiers for distributing an input signal of the RF power amplifier between the first and second amplifier transistors;
an input bus bar disposed perpendicular to the axis, wherein the first and second amplifier transistor inputs are electrically coupled in common to the input bus bar, and wherein the splitting network is electrically coupled to the inputs of the first and second amplifier transistors via the input bus bar;
a combining network electrically coupled to the outputs of the first and second amplifier transistors for combining output signals from the first and second amplifier transistors into an output signal of the RF power amplifier; and
an output bus bar disposed perpendicular to the axis, wherein the first and second amplifier transistor outputs are electrically coupled in common to the output bus bar and wherein the combining network is electrically coupled to the outputs of the first and second amplifier transistors via the output bus bar. - View Dependent Claims (120)
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121. A system incorporating a radio frequency amplifier, wherein the amplifier comprising:
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a first amplifier transistor having an input and an output;
a second amplifier transistor having an input and an output, wherein the first and second amplifier transistors define an axis about which the first and second amplifier transistors are symmetrically disposed;
a splitting network electrically coupled to the inputs of the first and second transistor amplifiers for distributing an input signal of the RF power amplifier between the first and second amplifier transistors;
an input bus bar disposed perpendicular to the axis, wherein the first and second amplifier transistor inputs are electrically coupled in common to the input bus bar, and wherein the splitting network is electrically coupled to the inputs of the first and second amplifier transistors via the input bus bar;
a combining network electrically coupled to the outputs of the first and second amplifier transistors for combining output signals from the first and second amplifier transistors into an output signal of the RF power amplifier; and
an output bus bar disposed perpendicular to the axis, wherein the first and second amplifier transistor outputs are electrically coupled in common to the output bus bar and wherein the combining network is electrically coupled to the outputs of the first and second amplifier transistors via the output bus bar.
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122. A printed circuit board having conductive traces for a radio frequency power amplifier comprising:
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a first amplifier transistor having an input and an output;
a second amplifier transistor having an input and an output, wherein the first and second amplifier transistors define an axis about which the first and second amplifier transistors are symmetrically disposed;
a splitting network electrically coupled to the inputs of the first and second transistor amplifiers for distributing an input signal of the RF power amplifier between the first and second amplifier transistors;
an input bus bar disposed perpendicular to the axis, wherein the first and second amplifier transistor inputs are electrically coupled in common to the input bus bar, and wherein the splitting network is electrically coupled to the inputs of the first and second amplifier transistors via the input bus bar;
a combining network electrically coupled to the outputs of the first and second amplifier transistors for combining output signals from the first and second amplifier transistors into an output signal of the RF power amplifier; and
an output bus bar disposed perpendicular to the axis, wherein the first and second amplifier transistor outputs are electrically coupled in common to the output bus bar and wherein the combining network is electrically coupled to the outputs of the first and second amplifier transistors via the output bus bar. - View Dependent Claims (123)
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Specification