System and method for dynamic drain voltage adjustment to...

Details System and method for dynamic drain voltage adjustment to... System and method for dynamic drain voltage adjustment to...

2011-03-15

2011-03-15

Nguyen, Khanh V (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including gain control means

C330S297000

Reexamination Certificate

active

07907014

ABSTRACT:
A system and method for dynamic adjustment of drain or collector voltage of a power amplifier (PA), including a PA having a voltage input, a temperature sensor measuring ambient temperature of the PA, and an adaptive PA control processor that dynamically changes the input voltage based on the ambient temperature, achieving a desired peak power when the system is subjected to high temperatures. In a further embodiment, a power sensor measures output power of the PA, and the control processor dynamically changes the voltage based on output power when the system serves a large cell in a mobile communication infrastructure employing high power. In a further embodiment, a multistage PA and method include amplifier stages having drain or collector voltage inputs, wherein a voltage applied to the inputs are set so as to be proportional to the peak power requirements of each stage, enhancing overall efficiency.

REFERENCES:
patent: 6169455 (2001-01-01), Yamaguchi
patent: 7183856 (2007-02-01), Miki et al.
patent: 7190221 (2007-03-01), Henze
patent: 7482873 (2009-01-01), Van Bezooijen et al.

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