Main Page | See live article | Alphabetical index An astable multivibrator is an electronic circuit that has two states, neither one which is stable. The circuit therefore behaves as an oscillator. The time spent in each state is usually controlled by the charging (or discharging) of a capacitor through a resistor. See also: bistable multivibrator, monostable multivibrator. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.