give definition and example about Spectrum Analyzer

derive forirer components of square wave signal

Describe in detail how diodes work and their common applications. Design a clipper circuit that eliminates the positive portion of an AC waveform as shown below, leaving only the negative half-cycles to appear on the output. State approximations that you used.

Answer the ff.__________1. A wave shaping circuit which controls the shape of the output waveform by removing a portion of the applied wave. __________2. An electronic circuitthat fixes either the positive or the negative peak excursions of a signal to a defined value by shifting its DC value. __________3. A form of semiconductor diode in which at a critical reverse voltage a large reverse current can flow. __________4. An electronic component composed of two conductive plates separated by an insulator. __________5. A type of capacitor used in sensing applications as well as in RF electronics. __________6. A type of capacitor where the cross-sectional area is changed as one set of plates are rotated with           respect to the other. __________7. A material used as electrodes for an electrolytic capacitor aside from aluminum.