Roberto Baca

Also, *V*<sup>2</sup>

and *V*<sup>0</sup>

202 Iron Ores and Iron Oxide Materials

(b) 1, and (c) 5 kHz. The input and output signals are shown.

like PLL system.

**5. Summary**

signals decrease slowly as frequency rises. Results from **Figure 10** indicate that

foil ferrite samples of grain-reduced crystalline structure with single magnetic domain offer controllable power losses under low-frequency excitation. Hence, a foil ferrite will operate

**Figure 10.** Waveforms monitored from the schematic circuit of **Figure 9** driven at three operating frequencies: (a) 0.5,

Since 1994, initiatives in response to the environmental and ecotoxicological concerns in manufacturing processes based on life-cycle assessment (LCA) have been established. To manufacturing electronic devices with desired characteristics, the conventional selection of raw materials had depended on link between material and function; however, environmental consequences of Address all correspondence to: rbaca02006@yahoo.com.mx

Department of Electronics, National Polytechnic Institute, México City, Mexico
