AMPLIFIER AND MOBILE COMMUNICATION DEVICE
First Claim
1. An amplifier comprising:
- an amplifier input for receiving an input signal;
an amplifier output for providing an output signal;
a first lower active sub cell and a second lower active sub cell, each comprising an input terminal and an output terminal, wherein the input terminals of the lower active sub cells are connected to the amplifier input and the output terminals of the lower active sub cells are not shorted;
a first upper active sub cell and a second upper active sub cell, each comprising a biasing terminal, an input terminal and an output terminal, wherein the input terminals and the output terminals of the upper active sub cells are coupled between the output terminals of the lower active sub cells and the amplifier output; and
a bias controller configured to provide a first biasing signal to the biasing terminal of the first upper active sub cell and a second biasing signal to the biasing terminal of the second upper active sub cell in dependence on an output power of the output signal.
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Accused Products
Abstract
An amplifier includes a first lower active sub cell and a second lower active sub cell, each comprising an input terminal and an output terminal, wherein the input terminals of the lower active sub cells are connected to the amplifier input and the output terminals of the lower active sub cells are not shorted. Furthermore, the amplifier includes a first upper active sub cell and a second upper active sub cell, each including a biasing terminal, wherein the input terminals and the output terminals of the upper active sub cells are coupled between the output terminals of the lower active sub cells and the amplifier output. The amplifier includes a bias controller configured to provide a first biasing signal to the first upper active sub cell and a second biasing signal to the second upper active sub cell based on an output power of the output signal.
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Citations
24 Claims
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1. An amplifier comprising:
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an amplifier input for receiving an input signal; an amplifier output for providing an output signal; a first lower active sub cell and a second lower active sub cell, each comprising an input terminal and an output terminal, wherein the input terminals of the lower active sub cells are connected to the amplifier input and the output terminals of the lower active sub cells are not shorted; a first upper active sub cell and a second upper active sub cell, each comprising a biasing terminal, an input terminal and an output terminal, wherein the input terminals and the output terminals of the upper active sub cells are coupled between the output terminals of the lower active sub cells and the amplifier output; and a bias controller configured to provide a first biasing signal to the biasing terminal of the first upper active sub cell and a second biasing signal to the biasing terminal of the second upper active sub cell in dependence on an output power of the output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An amplifier comprising:
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an amplifier input for receiving an input signal; an amplifier output for providing an output signal; a first lower transistor and a second lower transistor, each comprising a control terminal, a first terminal and a second terminal, wherein the control terminals of the lower transistors are connected to the amplifier input, the second terminals of the lower transistors are not shorted and the first terminals of the lower transistor are coupled to a reference potential terminal of the amplifier; a first upper transistor and a second upper transistor, each comprising a control terminal, a first terminal and a second terminal, wherein the first terminal of the first upper transistor is connected to the second terminal of the first lower transistor, the first terminal of the second upper transistor is connected to the second terminal of the second lower transistor and the second terminals of the upper transistors are shorted; a cascode comprising a lower cascode transistor and an upper cascode transistor, wherein a first terminal of the lower cascode transistor is connected to the second terminals of the upper transistors and a second terminal of the upper cascode transistor is connected to the amplifier output; and a bias controller configured to provide a first biasing signal to the biasing terminal of the first upper active sub cell, a second biasing signal to the biasing terminal of the second upper active sub cell, a third biasing signal to a control terminal of the lower cascode transistor and a fourth biasing signal to a control terminal of the upper cascode transistor in dependence on an output power of the output signal.
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24. A mobile communication device comprising:
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a baseband processor configured to provide a baseband signal; an RF modulator configured to provide, based on the baseband signal an input signal; an amplifier comprising; an amplifier input for receiving the input signal; an amplifier output for providing an output signal; a first lower active sub cell and a second lower active sub cell, each comprising an input terminal and an output terminal, wherein the input terminals of the lower active sub cells are connected to the amplifier input and the output terminals of the lower active sub cells are not shorted; a first upper active sub cell and a second upper active sub cell, each comprising a biasing terminal, an input terminal and an output terminal, wherein the input terminals and the output terminals of the upper active sub cells are coupled between the output terminals of the lower active sub cells and the amplifier output; a bias controller configured to provide a first biasing signal to the biasing terminal of the first upper active sub cell and a second biasing signal to the biasing terminal of the second upper active sub cell in dependence on an output power of the output signal; and an antenna configured to receive the output signal and to relay the output signal.
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Specification