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Multivibrador

Astavel01
R1, R2 = 1 kΩ
R3, R4 = 10 kΩ

En electrónica, un multivibrador es un circuito oscilador capaz de generar una onda cuadrada. Según su funcionamiento, los multivibradores se pueden dividir en dos clases:

  • De funcionamiento continuo, astable o de oscilación libre: genera ondas a partir de la propia fuente de alimentación.
  • De funcionamiento impulsado: a partir de una señal de disparo o impulso sale de su estado de reposo.

En su forma más simple son dos sencillos transistores realimentados entre sí. Usando redes de resistencias y condensadores en esa realimentación se pueden definir los periodos de inestabilidad.

Un circuito integrado multivibrador muy popular es el 555, que usa un sofisticado diseño para lograr una gran precisión y flexibilidad con muy pocos componentes externos.

Véase también

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Enlaces externos

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Multivibrador
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