M atsuzawa & O kada Lab. M atsuzawa Lab. Tokyo Institute ofTechnology M atsuzawa & O kada Lab. M atsuzawa Lab. Tokyo Institute ofTechnology 2010/12 /10 R. Minami , Tokyo tech. Measurement of Integrated PA-to- LNA Isolation on Si CMOS Chip Ryo Minami , JeeYoung Hong , Kenichi Okada , and Akira Matsuzawa Tokyo Institute of Technology, Japan
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Matsuzawa& Okada Lab.
Matsuzawa Lab.Tokyo Institute of TechnologyMatsuzawa
& Okada Lab.Matsuzawa Lab.Tokyo Institute of Technology
2010/12/10
R. Minami , Tokyo tech.
Measurement of Integrated PA-to-LNA Isolation on Si CMOS Chip
Ryo Minami , JeeYoung Hong ,Kenichi Okada , and Akira Matsuzawa
Tokyo Institute of Technology, Japan
2010/12/10
R. Minami , Tokyo tech.
2
Matsuzawa& Okada Lab.
Matsuzawa Lab.Tokyo Institute of TechnologyMatsuzawa
& Okada Lab.Matsuzawa Lab.Tokyo Institute of Technology
Outline
• Tx leakage and problem• Evaluation of Tx leakage
– Tx leakage paths– Measurement and Simulation method
• Result• Conclusion
2010/12/10
R. Minami , Tokyo tech.
3
Matsuzawa& Okada Lab.
Matsuzawa Lab.Tokyo Institute of TechnologyMatsuzawa
& Okada Lab.Matsuzawa Lab.Tokyo Institute of Technology
Background
• Merit– High frequency characteristic– High supply voltage
• Demerit– Chip area and cost
CMOS transistors can provide a sufficient performance for PA design.
The level of Tx leakage increases.
To investigate Tx leakage paths.
Conventionally, Power Amplifier (PA) has been implemented by compound semiconductors.
CMOS technology has been developed.
2010/12/10
R. Minami , Tokyo tech.
4
Matsuzawa& Okada Lab.
Matsuzawa Lab.Tokyo Institute of TechnologyMatsuzawa
& Okada Lab.Matsuzawa Lab.Tokyo Institute of Technology
Tx leakage and problem
FDD system
• The large transmitted signal leaks to Rx input side.• Tx leakage causes IM and degrades demodulation quality.
Tx leakage
interference signal
Rx signal
cross modulation
intermodulation distortion
Tx leakage
interference signal
Rx signal
LNA nonlinearity
Duplexer
PA
transmitted signal
received signal
LNATx
leakage
2010/12/10
R. Minami , Tokyo tech.
5
Matsuzawa& Okada Lab.
Matsuzawa Lab.Tokyo Institute of TechnologyMatsuzawa
& Okada Lab.Matsuzawa Lab.Tokyo Institute of Technology