A CMOS Polar Class-G Switched-Capacitor PA With a Single High-Current Supply, for LTE NB-IoT and eMTC
| Autor: | Paul Mateman, Arjan Breeschoten, Johan Dijkhuis, Elbert Bechthum, Christian Bachmann, Mohieddine El Soussi, Yao-Hong Liu, Gert-Jan van Schaik |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
business.industry Amplifier 020208 electrical & electronic engineering Transmitter Electrical engineering 02 engineering and technology Switched capacitor Power (physics) CMOS 0202 electrical engineering electronic engineering information engineering Radio frequency Electrical and Electronic Engineering Power Management Unit business Phase-shift keying |
| Zdroj: | IEEE Journal of Solid-State Circuits. 54:1941-1951 |
| ISSN: | 1558-173X 0018-9200 |
| DOI: | 10.1109/jssc.2019.2910407 |
| Popis: | Class-G efficiency enhancement of switched-capacitor (SC) power amplifiers (PAs) requires the power management unit (PMU) to have two high-current power supplies. This paper presents a Class-G efficiency enhancement that only requires one single high-current power supply with a lower bandwidth requirement, significantly simplifying the PMU. The system analysis shows that a transmitter with a resolution of 13 bits and a sample rate of $F_{RF}/2$ meets the requirements of the Cat-M1 and Cat-NB1 standard. The presented PA consists of a number of parallel SC cells. Each cell can be configured in two output-power modes, using only a single supply. At 807 MHz, the peak output power is 27.1 dBm, with an efficiency (PAE) of 33.3%. The efficiency at −6 and −12 dBFS is 22.5% and 14.4%, respectively, which is an improvement of $1.3\times $ and $1.7\times $ compared to Class-B. The 13-bit resolution enables a power-control range for Cat-M1 and Cat-NB1 signals of >63 dB. In that range, the error vector magnitude (EVM) is |
| Databáze: | OpenAIRE |
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