A 60 GHz CMOS power amplifier using varactor cross-coupling neutralization with adaptive bias
- Resource Type
- Conference
- Authors
- Minami, Ryo; Matsushita, Kota; Asada, Hiroki; Okada, Kenichi; Matsuzawa, Akira
- Source
- Asia-Pacific Microwave Conference 2011 Microwave Conference Proceedings (APMC), 2011 Asia-Pacific. :789-792 Dec, 2011
- Subject
- Fields, Waves and Electromagnetics
Engineered Materials, Dielectrics and Plasmas
Components, Circuits, Devices and Systems
Computing and Processing
Varactors
Capacitance
CMOS integrated circuits
Logic gates
Power measurement
Circuit stability
Gain measurement
Power amplifiers
CMOS
varactor
Cross-Coupling
- Language
- ISSN
- 2165-4727
2165-4743
This paper proposes the method of varactor cross-coupling with adaptive bias. The capacitive cross-coupling neutralization contributes to improve power gain and reverse isolation. The optimized capacitance of cross-coupled PA depends heavily on the input power. Thus, the varacter is used and adaptive bias is obtained by the feedback of the input power. The 2-stage differential power amplifier is fabricated in a 65nm CMOS process. It achieves the PAE at P 1dB of 7.7% and peak PAE of 12.5% from a 1.2V power supply. The effect of varactor cross-coupling neutralization with adaptive bias is validated.