Composite power amplifier
First Claim
1. A composite power amplifier including a first and a second power amplifier connected to an input signal over an input network and to a common load over an output network;
- and means in said input network for driving both power amplifiers to produce (first output current components having an amplitude that increases linearly with increasing output signal amplitude below a predetermined transition point and decreases monotonically with increasing output signal amplitude above said transition point, and second output current components having an amplitude that increases linearly with increasing output signal amplitude both below and above said transition point.
1 Assignment
0 Petitions
Accused Products
Abstract
A composite power amplifier includes a first and a second power amplifier connected to an input signal over an input network and to a load over an output network. The output network includes phase shifting elements for generating different phase shifts from each power amplifier output to the common load. The input network includes means for driving both power amplifiers to produce first output current components having an amplitude that increases linearly with increasing output signal amplitude below a transition point (T.P) and decreases motonically with increasing output signal amplitude above said point, and second output current components having an amplitude that increases linearly with increasing output signal amplitude both below and above the transition point.
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Citations
24 Claims
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1. A composite power amplifier including a first and a second power amplifier connected to an input signal over an input network and to a common load over an output network;
- and means in said input network for driving both power amplifiers to produce (first output current components having an amplitude that increases linearly with increasing output signal amplitude below a predetermined transition point and decreases monotonically with increasing output signal amplitude above said transition point, and second output current components having an amplitude that increases linearly with increasing output signal amplitude both below and above said transition point.
- View Dependent Claims (2, 3, 4, 5, 6)
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7. A Chireix type composite power amplifier including a first and a second power amplifier connected to a common load over an output network;
- and phase shifting elements in said output network generating different phase shifts from each power amplifier output to said load, thereby eliminating the need for compensating reactances.
- View Dependent Claims (8)
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9. A method of driving a composite amplifier output network including phase shifting elements generating different phase shifts from each power amplifier output to a common load, said method including the step of driving said output network in different operating modes in different frequency bands.
- 10. A method of driving a composite power amplifier including a first and a second power amplifier connected to an input signal over an input network and to a common load over an output network, said method including the step of driving both power amplifiers to produce first output current components having an amplitude that increases linearly with increasing output signal amplitude below a predetermined transition point and decreases monotonically with increasing output signal amplitude above said transition point, and second output current components having an amplitude that increases linearly with increasing output signal amplitude both below and above said transition point.
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17. A radio terminal including a composite power amplifier, which includes a first and a second power amplifier connected to an input signal over an input network and to a common load over an output network;
- and means in said input network for driving both power amplifiers to produce first output current components having an amplitude that increases linearly with increasing output signal amplitude below a predetermined transition point and decreases monotonically with increasing output signal amplitude above said transition point, and second output current components having an amplitude that increases linearly with increasing output signal amplitude both below and above said transition point.
- View Dependent Claims (18, 19, 20, 21, 22)
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23. A radio terminal including a Chireix type composite power amplifier, which includes a first and a second power amplifier connected to a common load over an output network;
- and phase shifting elements in said output network generating different phase shifts from each power amplifier output to said load, thereby eliminating the need for compensating reactances.
- View Dependent Claims (24)
Specification