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H-Bridge Class-D Power Amplifiers for Digital Pulse Modulation Transmitters

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4 Author(s)
Tsai-Pi Hung ; Univ. of California, San Diego ; Rode, J. ; Larson, L.E. ; Asbeck, P.M.

This paper presents an H-bridge class-D power amplifier for digital pulse modulation transmitters. For the proposed class-D amplifier, the drivers of the pull-up and pulldown devices were separated to minimize power loss associated with the shoot-through currents. The amplifier can be driven by binary digital signals generated by a delta-sigma modulator directly. The H-bridge class-D power amplifier system was tested with CDMA IS-95 signals at 800 MHz. The drain efficiency of 31% was achieved with output power of 15 dBm and an ACPR of -43 dBc.

Published in:

Microwave Symposium, 2007. IEEE/MTT-S International

Date of Conference:

3-8 June 2007

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