I think that's patentese.

the present invention teaches that the converter comprises a bias stage, adapted to generate and feed the signal stage with an input DC bias voltage, where the input DC bias voltage is adapted to keep the output DC bias current constant during the variation of the first resistor, thus providing a gain adjustment without any variation of performance parameters such as current consumption and output linearity.

http://www.patentstorm.us/patents/7230490-description.html


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Note added at 9 mins (2008-01-31 00:34:38 GMT)
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The present invention solves the problems present in the prior art. The present invention teaches a self-timed, self-actuated, and self-rearmed system for extinguishing candles on a pre-determined cycle.

The present invention teaches a system for controlling the burning cycle of a candle or other device with a fuel body which has two sources of stored energy for operating the control system and for operating the extinguishing mechanism.

The present invention teaches the use of a source of compressed fluid, usually air, controlled by the mass or weight of a consumable fuel to extinguish one or more fuel bodies independently of each other.

The present invention teaches the use of a rack and pawl mechanism biased in one direction and counteracted by the weight of the consumable fuel body in the other direction to control the burning cycle of the fuel body.
http://www.freepatentsonline.com/3905746.html