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Definition of "current-controlled multivibrator" |
a multivibrator with oscillation period controlled by the current that is charging and discharging a timing capacitor. Most of the circuits are based on two symmetric controlled current sources connected by a timing capacitor, and a steering circuit (connected between power supply voltage and this capacitor), which includes two switches. The switches take turns providing the conducting path for the current sources, and the current in the timing capacitor changes direction each half of the period. If the current sources are controlled by an external voltage, the circuit becomes a voltage-controlled multivibrator. Current- and voltage controlled multivibrators are a vital part of phase-locked loops and frequency synthesizers. |
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