Scalable Periphery Tunable Matching Power Amplifier

摘要

A scalable periphery tunable matching power amplifier is presented. Varying power levels can be accommodated by selectively activating or deactivating unit cells of which the scalable periphery tunable matching power amplifier is comprised. Tunable matching allows individual unit cells to see a constant output impedance, reducing need for transforming a low impedance up to a system impedance and attendant power loss. The scalable periphery tunable matching power amplifier can also be tuned for different operating conditions such as different frequencies of operation or different modes.

主权项

1. An amplifier, comprising:
a scalable periphery amplifier comprising one or more unit cells connected in parallel with each other and adapted to be selectively activated or deactivated, wherein each unit cell comprises a plurality of active devices configured to operate as an amplifier; an output tunable matching network operatively connected to an output of the scalable periphery amplifier, wherein the tunable matching network is configured to adjust an output load impedance seen by the output of the scalable periphery amplifier; and an amplifier control circuitry configured to selectively activate or deactivate the one or more unit cells, thus varying a total output power from the amplifier, wherein the plurality of active devices of the one or more unit cells are a stack of a plurality of transistors, an input transistor of the plurality of transistors in the stack being configured to receive an input signal of the scalable periphery amplifier.