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CACD Group updated 2000.03.30 Author Janez Puhan |
Precision Peak Value DetectorThe circuitWhile rectifiers have to convert ac power into dc power with the highest possible efficiency, a detector should demodulate radio frequency carriers with the best possible linearity. In the earlier times, radio engineers were concerned with sensitivity because quality amplifiers were still unavailable. Crystals were used as the detecting element to sense the weak electromagnetic fields. Today's semiconductor diodes have their origin in these early crystal detectors. Rectification efficiency improves by increasing the bend of the diode characteristic. Low voltages occur with small curvatures.
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