| 摘要 |
A circuit for non-destructive sensing of polarized materials includes a signal generator to generate a periodic, alternating voltage signal. The alternating voltage signal is applied to at least one cell of polarized material, such that the cell produces a cell output signal. A synchronous rectifier then rectifies the cell output waveform into positive and negative rectified signals. A differentiating amplifier receives the positive and negative rectified signals and produces an output signal wherein the output signal represents a data state of the cell.
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