Transmitting output stage with adjustable output power and...

Details Transmitting output stage with adjustable output power and... Transmitting output stage with adjustable output power and...

2006-10-20

2009-02-03

Mottola, Steven J (Department: 2817)

Amplifiers

Combined with automatic amplifier disabling switch means

C330S295000, C330S302000

Reexamination Certificate

active

07486133

ABSTRACT:
In one embodiment of a transmitting output stage, a first controllable amplification device with a first amplification factor and a second amplification device with a second amplification factor are provided. The two amplification devices are connected on the input side to a signal input. The transmitting output stage comprises a first matching network, which is connected on the input side to an output of first amplification device. A second matching network is also provided, which is installed switchably between an output of the second amplifier stage and the input of the first matching network and which, in one operating mode of the transmitting output stage in which only the second amplifier stage is being used, is connected between the second amplifier stage and the first matching network. Other embodiments are also disclosed.

REFERENCES:
patent: 7135919 (2006-11-01), Chen
patent: 101 36 624 (2003-02-01), None
patent: 102 11 609 (2003-10-01), None
“High-Linearity RF Amplifier Design”, Peter B. Kenington, Artech House Microwave Library, 2000, 13 pgs.
“Linear RF CMOS Power Amplifier with Improved Efficiency and Linearity in Wide Power Levels”, N. Srirattana, P. Sen, H.-M. Park, C.-H. Lee, P.E. Allen and J. Laskar, IEEE, 2005, 4 pgs.
“Applying Switched Gain Stage Concepts to Improve Efficiency and Linearity for Mobile CDMA Power Amplification”, J. Staudinger, Microwave Journal, Sep. 2000, 12 pgs.

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