A 2.4 GHz Fully Integrated Cascode-Cascade CMOS Doherty Power Amplifier

This letter presents the first CMOS Doherty power amplifier (PA) fully integrated on chip. The "cascode-cascade" amplifier architecture is proposed to get rid of the bulky power splitter and facilitate the integration. The quarter wavelength transmission lines are replaced by the lumped co...

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Bibliographic Details
Published in:IEEE microwave and wireless components letters 2008-03, Vol.18 (3), p.197-199
Main Authors: Li-Yuan Yang, Hsin-Shu Chen, Chen, Y.-J.E.
Format: Article
Language:English
Subjects:
Amplifiers
Applied sciences
Circuit properties
Circuits
CMOS
CMOS technology
Degradation
Design. Technologies. Operation analysis. Testing
Distributed parameter circuits
efficiency
Electric, optical and optoelectronic circuits
Electronic circuits
Electronic equipment and fabrication. Passive components, printed wiring boards, connectics
Electronics
Exact sciences and technology
fully integrated
Gain
Integrated circuits
Microwaves
Noise levels
orthogonal frequency division multiplexing (OFDM)
peak-to-average power ratio (PAPR)
power amplifier (PA)
Power amplifiers
power back-off
Power generation
Power measurement
Power splitters
Power transmission lines
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Transmission line measurements
Wavelength measurement
Wavelengths
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Summary:This letter presents the first CMOS Doherty power amplifier (PA) fully integrated on chip. The "cascode-cascade" amplifier architecture is proposed to get rid of the bulky power splitter and facilitate the integration. The quarter wavelength transmission lines are replaced by the lumped component networks such that the whole amplifier circuit can be squeezed into the die size of 1.97 times 1.4 mm 2 . Fabricated in 0.18 mum CMOS technology, the 3.3 V PA achieves 12 dB power gain. The measured output power and power added efficiency (PAE) at P 1 dB are more than 21 dBm and 14%, respectively. The PAE at 7 dB back-off from P 1 dB is above 10% and the PAE degradation is less than 29%.
ISSN:1531-1309
2771-957X
1558-1764
2771-9588
DOI:10.1109/LMWC.2008.916812