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Automatic Level Control Circuits
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Inverted bipolar transistor doubles as a signal clamp: 06/07/01 EDN-Design Ideas / A number of circuits, such as level detectors and AM demodulators, benefit from a rectifier with a low offset voltage. Silicon diodes have an offset of approximately 0.6V and do not work well in low-level circuitry. A Schottky diode is a bit better...
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