Murata Manufacturing Co., Ltd.

Eta Wireless, Inc.

Brendan Metzner

David J Perreault

Yevgeniy A Tkachenko

James R Garrett

John R Hoversten

Ivan Duzevik

Sri Harsh Pakala

Described are circuits and techniques to increase the efficiency of radio-frequency (rf) amplifiers including rf power amplifiers (PAs) through 'supply modulation' (also referred to as “drain modulation” or “collector modulation”), in which supply voltages provided to rf amplifiers is adjusted dynamically (“modulated”) over time depending upon the rf signal being synthesized. For the largest efficiency improvements, a supply voltage can be adjusted among discrete voltage levels or continuously on a short time scale. The supply voltages (or voltage levels) provided to an rf amplifier may also be adapted to accommodate longer-term changes in desired rf envelope such as associated with adapting transmitter output strength to minimize errors in data transfer, for rf “traffic” variations.

RF power amplifier system having a multi-output supply generator and low-frequency turn off switch

RF power amplifier system with multiple supply modulators

Multi-output supply generator for RF power amplifiers with differential capacitive energy transfer

Described are concepts, circuits, systems and techniques directed toward N-phase control techniques useful in the design and control of supply generators configured for use in a wide variety of power management applications including, but not limited to mobile applications.

Supply generator and associated control methods

Described are circuits and techniques to increase the efficiency of radio-frequency (rf) amplifiers including rf power amplifiers (PAs) through 'supply modulation' (also referred to as 'drain modulation' or &#x201c;collector modulation&#x201d;), in which supply voltages provided to rf amplifiers is adjusted dynamically (&#x201c;modulated&#x201d;) overtime depending upon the rf signal being synthesized. For the largest efficiency improvements, a supply voltage can be adjusted among discrete voltage levels or continuously on a short time scale. The supply voltages (or voltage levels) provided to an rf amplifier may also be adapted to accommodate longer-term changes in desired rf envelope such as associated with adapting transmitter output strength to minimize errors in data transfer, for rf &#x201c;traffic&#x201d; variations.

Growing community of inventors

North Billerica, MA, United States of America

Brendan Metzner