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Current mode class-D power amplifiers for high efficiency RF applications

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3 Author(s)
Kobayashi, H. ; Fuji Electr. Co. Ltd., Nagano, Japan ; Hinrichs, J. ; Asbeck, P.M.

We show that current mode class-D (CMCD) power amplifiers can achieve high efficiency at RF frequencies. In contrast with conventional voltage-mode class D amplifiers, the CMCD features "zero voltage switching" which eliminates the output capacitance discharge loss. Experimental CMCD amplifiers with 76.3% PAE at 290 mW output and 71.3% PAE at 870 mW output are demonstrated, using GaAs FETs at 900 MHz.

Published in:

Microwave Symposium Digest, 2001 IEEE MTT-S International  (Volume:2 )

Date of Conference:

20-24 May 2001