Glossary
| 180° out of phase | When two identical sine waves are upside down with respect to each other. |
| Active | A device that controls current is said to be active. |
| Ampere | Standard unit to measure electrical current. Abbreviated to amp, symbol A. |
| Amplitude | The amplitude of an a.c. signal is the difference in voltage between its middle or common point and the peak voltage. |
| Analog | One of the two operating modes of a transistor, in which a variable tiny base current is used to control a large collector current. |
| Astable multi-vibrator | An oscillator whose output is a square wave. |
| Avalanche breakdown | The electronic breakdown of a diode when reverse biased to its breakdown voltage. |
| Avalanche point | The point on a diode’s characteristic curve when the curve rapidly changes ... |
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