Amplifiers – With semiconductor amplifying device – Including particular power supply circuitry
Reexamination Certificate
2006-02-08
2008-09-23
Mottola, Steven J (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including particular power supply circuitry
C330S136000
Reexamination Certificate
active
07427897
ABSTRACT:
A two-(or multi)stage power amplifier receives a variable RF input signal, and outputs an optimized. RF output signal from, for example, a mobile handset. The output power level from the handset is predetermined, as known in the art, by the received control signal from a base station. The first power amplifier stage amplifies the variable RF input signal and outputs an RF signal, Vin, to a power detector circuit and an RF signal to the second or next amplifier stage. The power detect circuit amplifies the Vin signal and rectifies that signal with a linearly biased diode and provides a detect signal to a DC to DC converter. The converter responds by providing an optimum voltage bias, which is linearly related to the DC voltage detect signal from the power detector, to the output stage, and, if desired, to the first and/or other stages of the power amplifier that optimizes the output power level while meeting the required linearity specification. The battery current consumption is optimized through this automatic, dynamically control of the supply voltage for the power amplifier at each output power level through the DC to DC converter.
REFERENCES:
patent: 6081161 (2000-06-01), Dacus et al.
patent: 6646511 (2003-11-01), Canyon et al.
patent: 6741127 (2004-05-01), Sasho et al.
patent: 6900692 (2005-05-01), Kim et al.
patent: 6900697 (2005-05-01), Doyle et al.
patent: 2002/0175764 (2002-11-01), Matsuura
patent: 2005/0285681 (2005-12-01), Doherty
patent: 0007294 (2000-02-01), None
patent: 03056698 (2003-07-01), None
Asbeck P M et al: Gainp/Gass DHBTS for Power Amplifiers in Wireless Applications, Compound Semiconductors 1998. Proceedings of the 25th International Symposium on Compound Semiconductors. Nara, Japan, Oct., 112-16, 1998, Institute of Physics Conference Series, London: IOP, GB, vol. 1 NR. 162.
Larson L et al: Device and Circuit Approaches for Improved Wireless Communications Tranmitters, IEEE Personal Communications, IEEE Communications Society, US. vol. 6, No. 5, Oct. 1999.
Bealo Peter
Hau Gary
Cesari and McKenna LLP
Fairchild Semiconductor Corporation
Mottola Steven J
Paul, Esq. Edwin H.
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