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Method and arrangement for generating almost sinusffoermiger voltages, in particular for the reference character representation by means of an electric characters machine
Method and arrangement for generating almost sinusffoermiger voltages, in particular for the reference character representation by means of an electric characters machine
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机译:用于产生几乎正弦负电压的方法和装置,特别是用于通过电子字符机来表示参考字符的电压
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1,093,636. Frequency changing. PAILLARD S.A. May 27, 1965 [June 18, 1964], No. 22550/65. Heading H2F. Each phase of a four-phase voltage of twice the frequency of a four-phase input voltage V 1 , V 2 , V 3 , V 4 is produced by selecting the appropriate peaks a, b, c, d of the input phases and combining them. The peaks are selected by diodes biased by batteries of voltage B, and the output obtained is approximately sinusoidal. Two transformers each with fourteen secondary windings, fourteen diodes and two bias batteries may be used (Fig. 3, not shown) or, if efficiency is unimportant, resistance networks and simpler transformers may be used (Figs. 4 to 9, not shown). The apparatus may supply voltages required by the typewriter typing signs defined by co-ordinates as in Specification 964,109.
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