Abstract
CONTROL of d-c power is used in most industry and defense systems. A new technique for controlling d-c power is called TRC (time-ratio control).1–7 The TRC operates by rapidly turning on and off current from a d-c source of power. After filtering the resulting pulses of current, a d-c voltage is provided that is less than the source voltage.4–7 In some applications,1 voltage is stepped up above the source voltage.

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