A 1.9-GHz CMOS Power Amplifier Using Three-Port Asymmetric Transmission Line Transformer for a Polar Transmitter

A 1.9-GHz CMOS Power Amplifier Using Three-Port Asymmetric Transmission Line Transformer for a Polar Transmitter

A 1.9-GHz CMOS differential power amplifier for a polar transmitter is implemented with a 0.18-mum RF CMOS process. All of the matching components, including the input and output transformers, are fully integrated. The concepts of injection locking and variable load are applied to increase the effic...

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Veröffentlicht in:IEEE transactions on microwave theory and techniques 2007-02, Vol.55 (2), p.230-238
Hauptverfasser: Changkun Park, Kim, Y., Haksun Kim, Hong, S.
Format: Artikel
Sprache:eng
Schlagworte:
Amplifiers
Applied sciences
Asymmetry
Circuit properties
Class-E
CMOS
CMOS process
Design. Technologies. Operation analysis. Testing
Differential amplifiers
Dynamic range
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
global system for mobile communication (GSM)
injection locking
Injection-locked oscillators
Integrated circuits
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
polar transmitter
power amplifier
Power amplifiers
Power generation
Power transmission lines
Radio frequency
Radiocommunications
Radiofrequency amplifiers
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Telecommunications
Telecommunications and information theory
Transformers
transmission line transformer
Transmission lines
Transmitters
Transmitters. Receivers
variable load
Voltage
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Beschreibung
Zusammenfassung:A 1.9-GHz CMOS differential power amplifier for a polar transmitter is implemented with a 0.18-mum RF CMOS process. All of the matching components, including the input and output transformers, are fully integrated. The concepts of injection locking and variable load are applied to increase the efficiency and dynamic range of the amplifier. An asymmetric three-port transmission line transformer is proposed to embody the variable load effectively. The power amplifier achieved a power-added efficiency of 40% at a maximum output power of 32 dBm. The dynamic range was 20 dB at supply voltages ranging from 0.5 to 3.3 V. The improvement of the low power efficiency was 290% at an output power of 16 dBm
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2006.889152