A Recursive Switched-Capacitor House-of-Cards Power Amplifier
| Autor: | Patrick P. Mercier, James F. Buckwalter, Loai G. Salem |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Power-added efficiency
Engineering Switched-mode power supply business.industry Amplifier 020208 electrical & electronic engineering RF power amplifier Electrical engineering Power bandwidth 020206 networking & telecommunications Hardware_PERFORMANCEANDRELIABILITY 02 engineering and technology Switched capacitor CMOS Hardware_INTEGRATEDCIRCUITS 0202 electrical engineering electronic engineering information engineering Electronic engineering Linear amplifier Electrical and Electronic Engineering business |
| Zdroj: | IEEE Journal of Solid-State Circuits. 52:1719-1738 |
| ISSN: | 1558-173X 0018-9200 |
| DOI: | 10.1109/jssc.2017.2703781 |
| Popis: | A fully integrated CMOS power amplifier (PA) that efficiently generates high-voltage RF waveforms directly from a 4.8-V supply using only low-voltage thin-oxide transistors is introduced. High-voltage operation is achieved via implicit ~100% efficient dc–dc conversion enabled by stacking and flying individual class-D PA cells in a House-of-Cards (HoC) topology. By dynamically reconfiguring digitally controlled HoC slices to support different voltage conversion ratios and capacitively coupling their outputs, a Doherty-like high-efficiency backoff profile is achieved without using any magnetic impedance inverter. A test chip, implemented in 65-nm low-power CMOS, operates directly from 4.8 V using only 1.2-V transistors, and attains above 40% battery-to-RF efficiency at both 23-dBm peak power and at 6-dB backoff at 720 MHz. When applying a 10-MHz 16-quadrature amplitude modulation signal, the PA achieves an error vector magnitude of 3.6%-rms without using any predistortion techniques with an average output power and power-added efficiency of 15.7 dBm and 26.5%. |
| Databáze: | OpenAIRE |
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