Monolithic Transformer-coupled Rf Power Amplifiers in Si-bipolar
نویسندگان
چکیده
Monolithic integrated lumped planar transformers were introduced more than ten years ago. We present a comprehensive review of the electrical characteristics which results in an accurate lumped low-order equivalent model. Amplifiers, mixers and Meissner-type voltage controlled oscillators using monolithic transformers have been published a few years ago. For the first time, integrated transformer-coupled power amplifiers with a high performance up to 2 GHz are demonstrated. This presentation gives an introduction into monolithic transformer and circuit design of push-pull type power amplifiers. Two designs were realized: 1) A monolithic 2 V, 1 W Si-bipolar power amplifier with 55 % poweradded efficiency at 1.9 GHz. 2) A monolithic 2.8 V, 3.2 W Si-bipolar power amplifier with 54 % poweradded efficiency at 900 MHz.
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