| 摘要 |
A pulse step modulator is provided that includes a plurality of series connected unit step modules, each including a DC voltage source and an associated actuatable switching means for, when actuated, turning ON the associated module to provide a unit step voltage. An output circuit is connected to the series connected modules for providing an output voltage to a load wherein the magnitude of the output voltage is equal to the sum of all of the voltage sources of the modules that are turned ON. A plurality of turn ON signals are provided with each serving to actuate one of the switches in one of the modules. A transformer is provided having an elongated core which has an axis of symmetry. A primary winding is coaxially wound about the core for a substantial portion of the axial length of the core. A plurality of secondary windings are coaxially wound about the core. Each unit step module includes one of the secondary windings. A stray capacitance is associated between each secondary winding and the primary winding. This stray capacitance is minimized by employing a structure wherein each secondary winding is wound in radial and axial directions about the core axis and wherein the extent of the winding in the radial direction is substantially greater than that in the axial direction.
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