# Linear transformer signal conditioner

2017-03-20 11:17

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A1 and its associated components furnish an amplitude stable sine wave source. All positive feedback path is a Wein bridge, tuned for 1.5 kHz, Ql, the LT1004 reference, and additional components in Al's negative loop unity-gain stabilize the amplifier. Al's output an amplitude stable sine wave, drives the LVDT. Cl detects zero crossings and feeds the LTC1043 clock pin. A speed-up network at Cl's input compensates LVDT phase shift, synchronizing the LTC1043's clock to the transformer's output zero crossings. The LTC1043 alternately connects each end of the transformer to ground, resulting in positive half-wave rectification at pins 7 and 14.

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