Amplifiers – With semiconductor amplifying device – Including frequency-responsive means in the signal...
Reexamination Certificate
2009-10-14
2011-12-06
Mottola, Steven J (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including frequency-responsive means in the signal...
Reexamination Certificate
active
08072271
ABSTRACT:
The present disclosure relates to RF power amplifier circuitry that may include a source termination circuit, a load termination circuit, or both used in an unconventional manner to shape amplitude-based amplitude modulation (AM-AM) distortion, amplitude-based phase modulation (AM-PM) distortion, or both to extend a linear operating range of the RF power amplifier circuitry. Conventional RF power amplifier circuitry may operate as a Class F RF power amplifier, which may use termination circuits to create impedance valleys at even harmonics of an RF carrier frequency to improve a saturated efficiency of the RF power amplifier circuitry. However, the termination circuits of the present disclosure may create impedance valleys that are not at even harmonics of an RF carrier frequency to shape amplitude-based distortion, thereby extending a linear operating range of the RF power amplifier circuitry.
REFERENCES:
patent: 5629648 (1997-05-01), Pratt
patent: 6043707 (2000-03-01), Budnik
patent: 6130579 (2000-10-01), Iyer et al.
patent: 6313705 (2001-11-01), Dening et al.
patent: 6377784 (2002-04-01), McCune
patent: 6750721 (2004-06-01), Patterson
patent: 7307473 (2007-12-01), Kusunoki et al.
Kim, Ell-Kou et al., “A Series Feedback Predistorter using Junction Resistance of Schottky Diode,” Proceedings of Asia-Pacific Microwave Conference, 2007, pp. 1-4, IEEE.
Staudinger, Joseph, “The Importance of Sub-Harmonic Frequency Terminations in Modeling Spectral Regrowth From CW Am-Am & Am-Pm Derived Non-Linearities,” 1997 Wireless Communications Conference, 1997, pp. 121-125, IEEE.
Vuolevi, Joel et al., “Measurement Technique for Increasing the Linearity by Optimising the Source Impedance of RF Power Amplifiers,” Radio and Wireless Conference, 2000, pp. 227-230, IEEE.
Yamada, Hiroshi et al., “Self-Linearizing Technique for L-Band HBT Power Amplifier: Effect of Source Impedance on Phase Distortion,” IEEE Transactions on Microwave Theory and Techniques, Dec. 1996, pp. 2398-2402, vol. 44, No. 12, IEEE.
Spears Edward T.
Stutzman Jason
Mottola Steven J
RF Micro Devices, Inc.
Withrow & Terranova, P.L.L.C.
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