A 1.9-GHz, 1-W CMOS class-E power amplifier for wireless communications
- 1 July 1999
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Solid-State Circuits
- Vol. 34 (7) , 962-970
- https://doi.org/10.1109/4.772411
Abstract
This paper presents a 1-W, class-E power amplifier that is implemented in a 0.35- m CMOS technology and suitable for operations up to 2 GHz. The concept of mode locking is used in the design, in which the amplifier acts as an oscillator whose output is forced to run at the input frequency. A compact off-chip microstrip balun is also proposed for output differential-to-single- ended conversion. At 2-V supply and at 1.98 GHz, the power amplifier achieves 48% power-added efficiency (41% combined with the balun).Keywords
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