A Multiband LTE SAW-Less CMOS Transmitter with Source-Follower-Driven Passive Mixers, Envelope-Tracked RF-PGAs, and Marchand Baluns : Analog Circuits and Related SoC Integration Technologies
In: IEICE transactions on electronics, Jg. 96 (2013), Heft 6, S. 774-782
academicJournal
- print, 18 ref
Zugriff:
We present a multiband LTE SAW-less CMOS transmitter with source-follower-driven passive mixers, envelope-tracked RF-programmable gain amplifiers (RF-PGAs), and Marchand Baluns. A driver stage for passive mixers is realized by a source follower, which enables a quadrature modulator (QMOD) to achieve low noise performance at a 1.2 V supply and contributes to a small-area and low-power transmitter. An envelope-tracking technique is adopted to improve the linearity of RF-PGAs and obtain a better Evolved Universal Terrestrial Radio Access Adjacent Channel Leakage power Ratio (E-UTRA ACLR). The Marchand balun covers more frequency bands than a transformer and is more suitable for multiband operation. The proposed transmitter, which also includes digital-to-analog converters and a phase-locked loop, is implemented in a 65-nm CMOS process. The implemented transmitter achieves E-UTRA ACLR of less than ―42 dBc and RX-band noise of less than ―158 dBc/Hz in the frequency range of 700 MHz―2.6 GHz. These performances are good enough for multiband LTE and SAW-less operation.
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A Multiband LTE SAW-Less CMOS Transmitter with Source-Follower-Driven Passive Mixers, Envelope-Tracked RF-PGAs, and Marchand Baluns : Analog Circuits and Related SoC Integration Technologies
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Autor/in / Beteiligte Person: | KIHARA, Takao ; SANO, Tomohiro ; MIZOKAMI, Masakazu ; FURUTA, Yoshikazu ; HOKAZONO, Mitsuhiko ; MARUYAMA, Takaya ; HEIMA, Tetsuya ; SATO, Hisayasu |
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Zeitschrift: | IEICE transactions on electronics, Jg. 96 (2013), Heft 6, S. 774-782 |
Veröffentlichung: | Oxford: Oxford University Press, 2013 |
Medientyp: | academicJournal |
Umfang: | print, 18 ref |
ISSN: | 0916-8524 (print) |
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