Efficiency Improvement for Diode-Clamped Linear Amplifier Using Unequally Divided Voltage Power Supply

A high-efficiency diode-clamped linear amplifier (DCLA) has been proposed to realize low electromagnetic interference caused by switching operations. In this article, a new concept of the DCLA, namely the higher efficiency unequally divided voltage power supply DCLA (DCLA-UeDV), is proposed-it uses...

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Bibliographic Details
Published inIEEE transactions on industry applications Vol. 57; no. 3; pp. 2666 - 2672
Main Authors Haruna, Junnosuke, Matano, Yusuke, Funato, Hirohito
Format Journal Article
LanguageEnglish
Published New York IEEE 01.05.2021
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Circuits
Clamping
Diode-clamped linear amplifier (DCLA)
Efficiency
Electric potential
Electromagnetic interference
linear amplifier
Linear amplifiers
Mathematical model
MOSFET
multilevel inverter
Optical switches
Power conversion
Power supplies
Power supply
Semiconductor devices
Semiconductor diodes
Switching circuits
Topology
Voltage
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Summary:A high-efficiency diode-clamped linear amplifier (DCLA) has been proposed to realize low electromagnetic interference caused by switching operations. In this article, a new concept of the DCLA, namely the higher efficiency unequally divided voltage power supply DCLA (DCLA-UeDV), is proposed-it uses the same circuit topology but changes the supply voltage ratio of the series-connected supply. It is well-known that the main loss component of a DCLA is caused by the semiconductor device under linear operation depending on the supply voltage and current flowing. In a conventional DCLA, an equally divided voltage is used to supply power. In this study, a lower supply voltage is applied for a higher current device, and a higher supply voltage is applied to the lower current device in the proposed DCLA-UeDV-the optimized voltage ratio being theoretically derived. Applying the optimized voltage ratio to a four-stage DCLA-UeDV, the power loss theoretically decreased by 10.7%, resulting in an efficiency improvement of 1.7 percentage points. The validity of the proposed method was verified by simulations of a four-stage and an eight-stage DCLA-UeDV and experiments based on the four-stage device.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2021.3065188