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Content Provider | IEEE Xplore Digital Library |
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Author | Honda, Y. Yokota, Y. Goto, N. Matsuno, N. Saito, Y. |
Copyright Year | 2012 |
Description | Author affiliation: Compound Semiconductor Devices Division, Renesas Electronics Corporation, 1753, Shimonumabe, Nakahara-Ku, Kawasaki, Kanagawa 211-8668, JAPAN (Honda, Y.; Yokota, Y.; Goto, N.; Matsuno, N.; Saito, Y.) |
Abstract | A high efficiency envelope tracking supply modulator IC for LTE handset use is presented. It is fabricated using 0.35 um CMOS with optional 6-V-MOSFETs, and operates at a wide supply voltage range from 2.9 to 6.0 V. This enables the supply modulator to be directly connected to a lithium-ion battery. The switching noise of the supply modulator is carefully designed to meet the received band (Rx) noise requirement. An envelope tracking power amplifier (ET-PA) consisting of the modulator IC and an InGaP/GaAs-heterojunction-bipolar-transistor (HBT) PA-IC is examined with 1.95-GHz-band, 10-MHz bandwidth long-term-evolution (LTE) up-link signal. Despite a use of high-breakdown-voltage CMOS process for the modulator, the ET-PA achieves a power-added efficiency (PAE) of 33.4% at an output power of 26 dBm with an adjustment channel leakage power ratio (ACLR) of −35 dBc. In comparison with a conventional PA, the PAE has improved 3.0 and 7.3% at an output power of 26 and 20 dBm, respectively. The Rx noise is −134 dBm/Hz. |
Starting Page | 1253 |
Ending Page | 1256 |
File Size | 372588 |
Page Count | 4 |
File Format | |
ISBN | 9781467322157 |
e-ISBN | 9782874870279 |
e-ISBN | 9782874870262 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2012-10-29 |
Publisher Place | Netherlands |
Access Restriction | Subscribed |
Rights Holder | EUROPEAN MICROWAVE ASSOC |
Subject Keyword | Noise Switches Frequency modulation Power amplifiers Radio frequency Capacitors Rx noise Efficiency envelope tracking wide supply voltage range long term evolution (LTE) |
Content Type | Text |
Resource Type | Article |
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