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Messages - james123

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Natural resource management / Natural resource management
« on: March 08, 2009, 11:02:34 AM »
When we look at natural resource management this is something that can be done in every home and every business, what are the natural resources? Water from rain, that can be saved from guttering and directed into a cotainer for use later, also bath water, washing water all these can be managed in the home or at the office. What other savings can be made from our natural resources, or does it cost too much to emplement?

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General Discussion / Re: RF Power Small Signal
« on: March 08, 2009, 10:55:50 AM »
The anomalous dip in scattering parameter S11 of RF power MOSFETs with drain-to-spacer offset is explained quantitatively for the first time. Our results show that, for RF power MOSFETs, the input impedance can be represented by a simple series RC circuit at low frequencies and a "shifted" parallel RC circuit at high frequencies. The appearance of the anomalous dip of S11 in a Smith chart is caused by this inherent ambivalent characteristic of the input impedance. It is found that an increase of drain-to-spacer offset enhances the anomalous dip. In addition, the anomalous dip in S11 of RF power n-MOSFETs can also be interpreted in terms of poles and zeros

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