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Hi Kevin. The standard impedance of a half wave is about 2k5 – 3k Ohm so we need impedance transformation of 1:50 – 1:60. The impedance transformation ratio of an auto transformer is determined by the winding ratio. Actually, it is the winding ratio squared. We require a 1:7 to 1:8 ratio to get 1:49 (with 1:7 winding ratio) or 1:64 (with 1:8 winding ratio) impedance transformation. Regardless of the winding ratio, there’s an additional crucial issue for the auto transformer to work efficiently and that is the major inductance which is dependent on the frequency you want to use. Reduced frequencies generally like to see higher major inductance. There is two way to acomplish that: larger or more (stacked) cores or much more primary (thus secundary, you want the ratio to remain the same!) windings.
32-bit chips compete mostly on efficiency for an application. There is a considerable range of 32-bit components accessible, every targeted at some particular application. They have a tendency to come loaded with peripherals and compete on function completeness. They have a large amount of addressable memory and the efficiency tends to be far better than 16-bit components.
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