Harmonic-Rejection Power Amplifier

Principal Investigator: Jacques Rudell

Wireless communication systems have garnered much attention in consumer electronics over the last decade. This is due to advancements in metal-oxide-semiconductor (CMOS) technologies, which have led to development of lower-cost, higher performance wireless transceivers for use in consumer electronics. Although many signal-generation components of wireless transceivers may now be integrated in CMOS, power amplifiers and discrete filters required to remove the harmonics produced by power amplifiers remain an issue for complete integration. Therefore, there is an unmet need for an improved power amplifier design that can easily be integrated into CMOS based wireless transceivers.

Dr. Rudell and his colleagues introduce a novel harmonic-rejection power amplifier (HRPA), which has a reduced need for discrete filters and thus can be easily integrated in CMOS based wireless transceivers. Unlike other harmonic-reject mixers, the separate channels are added together before being passed through a power amplifier. This technology keeps all paths separate and passes the modulated signals through a set of parallel CMOS-integrated power amplifier drivers. The outputs of these paths are then combined. As a result, HRPA reduces the need for discrete filters, exhibits improved linearity, and diminishes power consumption for CMOS based wireless transceivers.

• WiFi systems 

• Bluetooth technology 

• Telecommunication systems 

• Reduces the need for discrete filters for CMOS-based power amplifiers 

• Improves linearity of wireless transceiver systems 

• Reduces power consumption for wireless transceiver systems

For more info, contact: Ryan Buckmaster

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