Telecommunications – Transmitter – Power control – power supply – or bias voltage supply
Reexamination Certificate
2004-02-10
2008-10-28
Jackson, Blane J. (Department: 2618)
Telecommunications
Transmitter
Power control, power supply, or bias voltage supply
C455S127100, C330S285000, C330S12400D, C330S051000
Reexamination Certificate
active
07444124
ABSTRACT:
An architecture, circuits, systems and a method for amplifying an analog signal. The architecture and/or circuit generally includes a first fixed stage (e.g., a predriver) and an adjustable stage. The first fixed stage may be configured to amplify an analog signal and provide a first amplified analog output at a first common node. The adjustable stage may comprise a plurality of independently selectable parallel amplifier segments. Each of the parallel segments may have an input at the first common node and an output at a second common node, a transistor having a control terminal, and a first inductor in electrical communication with the control terminal of the transistor. The adjustable stage may be configured to apply a bias to the control terminal of the transistor in a selected segment and to provide an output signal in one of a plurality of a power ranges corresponding to a number of selected parallel amplifier segments. The output signal generally has a minimum power efficiency when two or more of the parallel segments are selected. The present invention advantageously provides a relatively compact power amplifier with an extended output power range at which the amplifier is highly efficient. In preferred embodiments, the input and output matching characteristics are generally independent of the number of selected output amplifier segments.
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IEEE Computer Society and the IEEE Microwave Theory and Techniques Society; “Part 16: Air Interface for Fixed Broadband Wireless Access Systems”; IEEE Standards for Local and Metropolitan Area Networks; Oct. 1, 2004; IEEE Std 802.16™ -2004; Institute of Electrical and Electronics Engineers, Inc., New York, NY.
“802.16 IEEE Standard for Local and Metropolitan Area Networks; Part 16: Air Interface for Fixed Broadband Wireless Access Systems,” 802.16 IEEE Standard for Local and Metropolitan Area Networks, Oct. 1, 2004, pp. i-xxxiv and pp. 1-857, IEEE Std 802.16-2004, IEEE, United States.
Loeb Wayne
Tsai King Chun
Jackson Blane J.
Marvell International Ltd.
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