Importance

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Abstract

A signal-conditioning circuit provides an output signal (V.sub.O) at a frequency representative of an effect such as strain or temperature that acts on a resistance bridge (20) preferably arranged in a Wheatstone configuration. A pair of energizing voltages (V.sub.E1 and V.sub.E2) are supplied on corresponding lines (21 and 22) to energize the bridge. The signal-conditioning circuit contains an integrator (34 and C1), a comparator that compares the integrator output voltage (V.sub.I) with one of the energizing voltages (V.sub.E2), and switching circuitry (23 and 24) that suitably switches the polarity of the energizing voltages in response to the output voltage.

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First Claim