Permachart - Marketing Reference Guide: Semiconductor Device, Precision Rectifier, Envelope Detector

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Laplace transform: laplace transform applies only to time functions that are zero for t < 0; it implicates complex frequency s = jv + s. Diodes: diodes are 2-terminal devices that pass current in 1 direction, when a large enough reverse voltage is applied to any diode, it will conduct current in the reverse direction (breakdown) Advantage: forward voltage drop for silicon diodes is about. 0. 7 v, compared to 0. 3 v for germanium diodes. Disadvantage: breakdown voltages for germanium diodes are usually less than 100 v, compared to 50 1000 v for silicon. Ideal diode: diode is either an open circuit or a short circuit. Schottky diode: metal semiconductor junction diode, has low 0. 3 v forward voltage drop, al or pt may act as acceptor when in contact with n -type si. Varactor (varicap diode: a diode that acts as a capacitance controlled by the reverse-bias voltage, no forward bias due to high shunt conductance.

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