31 the illustrative embodiment employs a significant number of machine wound turns requiring the use of fine copper wire e g 34 awg in order to construct a commercially viable compact and cost effective transducer fig4 illustrates a typical application of the actively compensated current and voltage ratio transformers as employed in a digital power meter for schematic simplicity the block diagram of fig4 illustrates the key functional sections with a single phase voltage and current pair phase a shown it will be appreciated that for polyphase applications a simple duplication of the analog circuitry is all that is required from a hardware standpoint for additional voltage and current phase pairs the primary input current ip is applied to an actively compensated current ratio transformer 40 as previously described and shown in fig1 the compensated burden resistor voltage output is applied to a series of fixed gain amplifiers 41 ranging from a high gain creep stage to a lower gain over_range stage the outputs of these amplifiers 41 are applied to the multiplexed inputs of a current a d converter 42 the specific selected input is controlled by a digital signal processor 43 operating to select the required range based on current signal levels this auto ranging capability utilizes the wide dynamic range offered by the actively compensated current ratio.