TY - GEN
T1 - Envelope tracking power supply for volume-sensitive low-power applications based on a resonant switched-capacitor converter
AU - Cervera, Alon
AU - Peretz, Mor Mordechai
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016/5/10
Y1 - 2016/5/10
N2 - This paper introduces a new envelope tracking power supply to enhance the performance and reduce the overall volume of transmitter modules. The realization is based on a gyrator resonant switched-capacitor converter (GRSCC) that acts as a controlled bi-directional current source with a virtually instantaneous response to create the desired envelope. A quasi-non-casual control method is further applied to closely track high-rate signals without further increasing the switching frequency. The resultant dynamic performance for a given envelope reference signal is significantly improved, providing envelope supply voltage without clipping distortion. Design example and simulations are detailed, and the operation of envelope tracker is verified on a 150mW prototype switched at 2.3MHz, able to track a 1MHz envelope with less than half the losses of a linear regulator.
AB - This paper introduces a new envelope tracking power supply to enhance the performance and reduce the overall volume of transmitter modules. The realization is based on a gyrator resonant switched-capacitor converter (GRSCC) that acts as a controlled bi-directional current source with a virtually instantaneous response to create the desired envelope. A quasi-non-casual control method is further applied to closely track high-rate signals without further increasing the switching frequency. The resultant dynamic performance for a given envelope reference signal is significantly improved, providing envelope supply voltage without clipping distortion. Design example and simulations are detailed, and the operation of envelope tracker is verified on a 150mW prototype switched at 2.3MHz, able to track a 1MHz envelope with less than half the losses of a linear regulator.
UR - http://www.scopus.com/inward/record.url?scp=84973661467&partnerID=8YFLogxK
U2 - 10.1109/APEC.2016.7468186
DO - 10.1109/APEC.2016.7468186
M3 - Conference contribution
AN - SCOPUS:84973661467
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 2298
EP - 2303
BT - 2016 IEEE Applied Power Electronics Conference and Exposition, APEC 2016
PB - Institute of Electrical and Electronics Engineers
T2 - 31st Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2016
Y2 - 20 March 2016 through 24 March 2016
ER -