Enhanced impedance measurement using CTMU

A sensing apparatus to measure a phenomenon, comprising:

• a voltage input to receive a pulsed input direct current (DC) voltage;
• a bridge sensor circuit including:
• a first bridge leg circuit including a variable impedance component, the variable impedance component including an impedance, which varies based upon the phenomenon, coupled at a first output to a first reference resistance connected in series with the variable impedance component, and
• a second bridge leg circuit including a reference impedance component coupled at a second output to a second reference resistance connected in series with the reference impedance component;
• a first comparator coupled to the first output and a reference voltage;
• and
• a second comparator coupled to the second output and the reference voltage;
• wherein a combination of an output of the first comparator and an output of the second comparator represent a measurement of the phenomenon.